CN113670244A - T-shaped hollow elevator guide rail section deviation testing device and method - Google Patents
T-shaped hollow elevator guide rail section deviation testing device and method Download PDFInfo
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- CN113670244A CN113670244A CN202111234418.5A CN202111234418A CN113670244A CN 113670244 A CN113670244 A CN 113670244A CN 202111234418 A CN202111234418 A CN 202111234418A CN 113670244 A CN113670244 A CN 113670244A
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention relates to the technical field of elevator guide rail detection, in particular to a T-shaped hollow elevator guide rail section deviation testing device and a method, wherein the device comprises the following components: the device comprises a bottom plate, a portal frame and a guide rail fixing piece; the detection assembly comprises two rollers, two swing arms and a moving member, the two rollers are rotatably connected with the swing arms, the swing arms are connected with the moving member, a cross beam of the portal frame is provided with a sliding groove extending towards the length direction of the portal frame, and the moving member is movably arranged along the length direction of the sliding groove; the patch type pressure sensor is fixed on two side walls of the chute; the driving piece is connected with the detection assembly and is used for driving the detection assembly to move in the sliding groove in a reciprocating mode; wherein, the moving member has the pinch roller on the both sides towards SMD pressure sensor direction, and the pinch roller is laminated with SMD pressure sensor, and the side laminating that detects is waited with the guide rail to the gyro wheel. According to the invention, the deviation defect of the section of the T-shaped hollow elevator guide rail is detected through the pressure change on the patch type pressure sensor, so that the detection is more accurate and the detection efficiency is higher.
Description
Technical Field
The invention relates to the technical field of elevator guide rail detection, in particular to a T-shaped hollow elevator guide rail section deviation testing device and method.
Background
The T-shaped elevator guide rail is divided into a solid elevator guide rail and a hollow elevator guide rail, the processing modes of the two products are different, the solid T-shaped guide rail is formed by rolling through a rolling mill, and the hollow T-shaped guide rail is formed by bending a plate; because the machining mode is different from that of a solid guide rail, the final possible deviation of the two products is different, the possible deviation of the solid guide rail is mainly the straightness deviation, and the deviation of the hollow elevator guide rail is different in cross section at different positions due to local problems and bending deviation of the adopted plates.
In the related art, most of the detection for the hollow T-shaped guide rail is realized by arranging a laser straightness sensor on one end surface of the elevator guide rail, and an operator needs to detect the straightness of each side wall in turn, however, the detection depends on artificial vision to determine the straightness, and the detection precision and the detection efficiency are poor.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the device and the method for testing the section deviation of the T-shaped hollow elevator guide rail are provided, and the section deviation of the hollow elevator guide rail is detected.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, the present disclosure provides a T-shaped hollow elevator guide rail section deviation testing device, including:
the support comprises a bottom plate, a portal frame and guide rail fixing pieces, the length direction of the portal frame is parallel to the length direction of the bottom plate, the portal frame is arranged at the center of the width direction of the bottom plate, and the guide rail fixing pieces are arranged at the positions of two sides of the portal frame and used for fixing the guide rails;
the detection assembly comprises two idler wheels, two swing arms and a moving piece, the two idler wheels are rotatably connected with the swing arms, the swing arms are connected with the moving piece, a cross beam of the portal frame is provided with a sliding groove extending towards the length direction of the portal frame, and the moving piece is movably arranged along the length direction of the sliding groove;
the patch type pressure sensor is fixed on two side walls of the sliding chute;
the driving piece is connected with the detection assembly and is used for driving the detection assembly to reciprocate in the sliding groove;
the moving member faces to pinch rollers are arranged on two sides of the direction of the patch type pressure sensor, the pinch rollers are attached to the patch type pressure sensor, and the idler wheels are attached to the side face of the guide rail to be detected.
Furthermore, the driving part comprises a screw rod arranged in parallel with the beam of the portal frame and a motor for driving the screw rod to rotate;
the bottom of the moving piece is also connected with a nut seat, and the nut seat is meshed with the screw rod.
Furthermore, the swing arm and the two sides of the nut seat are hinged, and the hinged part is connected with a torsion spring so as to ensure the fitting degree of the roller and the guide rail to be tested.
Furthermore, the sliding groove is formed in the upper surface of a cross beam of the portal frame, the bottom center of the sliding groove is arranged in a penetrating mode, the nut seat is connected with the moving piece through the bottom penetrating position, the moving piece is provided with pulleys in rolling connection with the position, not penetrating, of the bottom of the sliding groove, and the maximum distance between the two pulleys in the width direction is smaller than the width of the sliding groove.
Further, the guide rail fixing part comprises a base, two crimping plates and a fastener, wherein vertical threaded holes are formed in the base and the crimping plates, the fastener penetrates through the rear portion of the crimping plate and is connected with the base, the two crimping plates are arranged in the vertical direction, when the web of the guide rail is vertically placed, the crimping plates are crimped on a wing plate on one side of the guide rail, and when the web of the guide rail is horizontally placed, the web of the guide rail is pressed and held between the two crimping plates.
Furthermore, the bottom plate is also provided with a supporting piece, the supporting piece is arranged near the vertical upright column close to the portal frame, and the supporting piece is used for supporting at least one end of the guide rail in the length direction.
Furthermore, the axial direction of pinch roller is vertical setting, just the axial lateral surface of pinch roller is the arc.
Furthermore, still have the guide post towards its width direction setting on the moving member, be connected with the sliding sleeve on the guide post, the pinch roller is fixed the tip of sliding sleeve, just the sliding sleeve with compression spring has between the guide post, the guide post with it is spacing through a word hole between the sliding sleeve.
In a second aspect, the present disclosure also provides a method for testing section deviation of a T-shaped hollow elevator guide rail, which applies the device for testing section deviation of a T-shaped hollow elevator guide rail according to the first aspect, and includes the following steps:
s10: fixing two standard T-shaped hollow elevator guide rails on a bottom plate, and enabling two rollers to be attached to the inner side walls of the T-shaped hollow elevator guide rails;
s20: the detection assembly is driven to move along the length direction of a cross beam of the portal frame until a moving path covers the first two ends of the T-shaped hollow elevator guide rail;
s30: recording the pressure values sensed by the two pressure sensors;
s40: replacing one standard T-shaped hollow elevator guide rail with a T-shaped hollow elevator guide rail to be tested;
s50: after the driving detection assembly is reset, driving the detection assembly to move along the length direction of the cross beam of the portal frame again, and recording a second pressure value;
s60: and comparing the difference between the two pressure values, if the absolute value of the difference is greater than the threshold value, judging that the deviation exists on the section of the detected T-shaped hollow elevator guide rail, and judging the position of the T-shaped hollow elevator guide rail at which the deviation exists according to the time point when the driving speed and the pressure value exceed the threshold value.
Further, after step S30, the method further includes the following steps:
s31: the detection assembly is driven reversely, and the value of the pressure sensor during reverse movement is recorded;
after the forward detection of the first T-shaped hollow elevator guide rail to be detected accords with the standard, the second T-shaped hollow elevator guide rail to be detected is replaced by the second standard T-shaped hollow elevator guide rail, then the detection assembly is driven reversely, and the first T-shaped hollow elevator guide rail is verified while the second T-shaped hollow elevator guide rail to be detected is detected.
The invention has the beneficial effects that: according to the invention, the pressure sensor is arranged on the side wall of the sliding groove of the portal frame, and the detection component is driven to detect the pressure change on the patch type pressure sensor in a manner that the roller arranged on the detection component is attached to the surface to be detected of the guide rail, so that the deviation defect of the section of the guide rail of the T-shaped hollow elevator is detected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a T-shaped hollow elevator guide rail section deviation testing device in the embodiment of the invention;
FIG. 2 is a schematic cross-sectional structure diagram of a T-shaped hollow elevator guide rail section deviation testing device in the embodiment of the invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a moving part according to an embodiment of the present invention;
FIG. 5 is a schematic view of an embodiment of the present invention showing a horizontally disposed guide rail with a fixed web of a guide rail fastener;
fig. 6 is a flow chart of a method for detecting the section deviation of the guide rail of the T-shaped hollow elevator in the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The device for testing the section deviation of the T-shaped hollow elevator guide rail as shown in figures 1 to 5 comprises a bracket 10, a detection component 20, a patch type pressure sensor 30 and a driving element 40, wherein:
the support 10 comprises a bottom plate 11, a portal frame 12 and guide rail fixing pieces 13, wherein the length direction of the portal frame 12 is parallel to the length direction of the bottom plate 11, the portal frame 12 is arranged at the center of the width direction of the bottom plate 11, and the guide rail fixing pieces 13 are arranged at the positions of two sides of the portal frame 12 and used for fixing the guide rails; it should be noted here that the gantry 12 includes two parallel vertical columns and a cross beam connected to the tops of the two vertical columns;
the detection assembly 20 comprises two rollers 21, two swing arms 22 and a moving piece 23, the two rollers 21 are rotatably connected with the swing arms 22, the swing arms 22 are connected with the moving piece 23, a cross beam of the portal frame 12 is provided with a sliding groove extending towards the length direction of the portal frame, and the moving piece 23 is movably arranged along the length direction of the sliding groove;
the patch type pressure sensor 30 is fixed on two side walls of the chute; the patch type pressure sensor 30 is used for sensing the pressure transmitted on the detection component 20 so as to reflect the smoothness degree on the side wall of the T-shaped hollow elevator guide rail;
the driving part 40 is connected with the detection assembly 20 and is used for driving the detection assembly 20 to reciprocate in the chute;
wherein, moving member 23 has pinch roller 23a on the both sides towards SMD pressure sensor 30 direction, and pinch roller 23a and SMD pressure sensor 30 laminating, gyro wheel 21 and the side laminating that the guide rail detected. As shown in fig. 2 and 3, when the detecting assembly 20 moves laterally, the lateral force applied to the roller 21 is transmitted to the lateral pressing wheel 23a of the moving member 23, and the pressing wheel 23a is attached to the patch type pressure sensor 30, so that the pressure applied to the patch type pressure sensor 30 corresponds to the flatness of the side surface of the guide rail, when the pressure is increased, the side wall of the guide rail is protruded, otherwise, the side wall of the guide rail is sunken;
in the above embodiment, through set up pressure sensor on the spout lateral wall of portal frame 12, detect the mode of face laminating through gyro wheel 21 and the guide rail that set up on the detection component 20, drive detection component 20 and detect the change of pressure on SMD pressure sensor 30 to detect out the deviation defect in T type air core elevator guide rail cross-section, compare with prior art, detect more accurately, detection efficiency is higher
With continued reference to fig. 1 and fig. 2, in the embodiment of the present invention, the driving member 40 includes a screw 41 disposed parallel to the beam of the gantry 12 and a motor 42 for driving the screw 41 to rotate;
the bottom of the moving part 23 is also connected with a nut seat 24, and the nut seat 24 is meshed with the screw rod 41. With such an arrangement, under the driving of the motor 42, the screw rod 41 rotates, and since the screw rod 41 is engaged with the nut seat 24, the nut seat 24 moves in the axial direction of the screw rod 41, thereby driving the whole detection assembly 20 to move; besides, the lead screw 41 can provide power and also can support the whole detection assembly 20, and the stress condition of the roller 21 can be effectively transmitted to the pressing wheel 23a because the lead screw 41 and the nut seat 24 can rotate.
In the embodiment of the present invention, for convenience of description, the T-shaped hollow elevator guide rail is simply referred to as a guide rail, in order to ensure the attachment of the roller 21 to the side wall of the guide rail, the swing arm 22 is hinged to two sides of the nut seat 24, and the hinged portion is connected to a torsion spring (not shown in the figure), so as to ensure that a force is applied outwards on the swing arm 22 by the torsion force of the torsion spring, thereby ensuring the attachment of the roller 21 to the guide rail to be tested.
In order to reduce the influence of the gravity of the detection assembly 20 on the screw rod 41, in the embodiment of the present invention, the sliding groove is disposed on the upper surface of the beam of the gantry 12, the bottom center position of the sliding groove is disposed to penetrate, the nut seat 24 is connected to the moving member 23 through the bottom penetrating position, the moving member 23 is provided with a pulley 23b in rolling connection with the non-penetrating position of the bottom of the sliding groove, and the maximum distance of the two pulleys 23b in the width direction is smaller than the width of the sliding groove. Thus, the support of the pulley 23b ensures that the screw rod 41 is only forced in the length direction when rotating, and the service life and reliability of the device can be improved through the arrangement.
In the embodiment of the present invention, since the three sides of the guide rail are all detected, a structure capable of fixing the guide rail in various forms is provided, as shown in fig. 2 and 5, the guide rail fixing member 13 includes a base 13a, a press plate 13b and a fastening member 13c, the base 13a and the press plate 13b have vertical threaded holes, the fastening member 13c is connected to the base 13a after passing through the press plate 13b, the press plate 13b is provided with two in the vertical direction, when the web of the guide rail is vertically placed, the press plate 13b is pressed against one side wing plate of the guide rail, and when the web of the guide rail is horizontally placed, the web of the guide rail is pressed between the two press plates 13 b. Through this kind of setting, improved fixed efficiency, need not all to change the mounting at every turn.
In order to further ensure that the detection assembly 20 can prevent the guide rail from moving when moving, in the embodiment of the present invention, the bottom plate 11 further has a holding member 14, the holding member 14 is disposed near the vertical column of the gantry 12, and the holding member 14 is used for holding at least one end of the guide rail in the length direction. By the arrangement of the abutting piece 14, the guide rail is prevented from moving, and the detection reliability is improved.
In the moving process of the detecting assembly 20, since the angle of the moving member 23 may change due to the stress, in the embodiment of the present invention, in order to ensure the good contact between the pressing wheel 23a and the patch type pressure sensor 30, the pressing wheel 23a is axially vertically arranged, and the axial outer side surface of the pressing wheel 23a is arc-shaped. Like this, when pinch roller 23 a's angle also changed, through the setting of arc lateral wall, can guarantee with SMD pressure sensor 30's laminating degree, improve detection stability.
In order to prevent the patch type pressure sensor 30 from being damaged due to the excessively large angle change of the pressing wheel 23a, in the embodiment of the present invention, as shown in fig. 4, the moving member 23 further has a guide post 23c arranged toward the width direction thereof, the guide post 23c is connected with a sliding sleeve 23d, the pressing wheel 23a is fixed at the end of the sliding sleeve 23d, a compression spring (not shown in the figure) is arranged between the sliding sleeve 23d and the guide post 23c, and the guide post 23c and the sliding sleeve 23d are limited by a straight hole. It should be noted here that the linear hole limiting means a linear hole parallel to the moving direction of the sliding sleeve 23d and formed in the sliding sleeve 23d, and the guide post 23c has a limiting post disposed in the linear hole, so that flexible contact can be achieved by sliding the sliding sleeve 23d and matching with a compression spring, force transmission can be ensured, and the use reliability of the whole device is improved.
On the basis of the device, the embodiment of the invention also provides a method for testing the section deviation of the T-shaped hollow elevator guide rail by using the device, as shown in fig. 6, which comprises the following steps:
s10: fixing two standard T-shaped hollow elevator guide rails on the bottom plate 11, and enabling the two rollers 21 to be attached to the inner side walls of the T-shaped hollow elevator guide rails;
s20: the detection assembly 20 is driven to move along the length direction of the beam of the portal frame 12 until the moving path covers the first two ends of the T-shaped hollow elevator guide rail;
s30: recording the pressure values sensed by the two pressure sensors;
s40: replacing one standard T-shaped hollow elevator guide rail with a T-shaped hollow elevator guide rail to be tested;
s50: after the driving detection assembly 20 is reset, driving the detection assembly 20 to move along the length direction of the beam of the portal frame 12 again, and recording a second pressure value;
s60: and comparing the difference between the two pressure values, if the absolute value of the difference is greater than the threshold value, judging that the deviation exists on the section of the detected T-shaped hollow elevator guide rail, and judging the position of the T-shaped hollow elevator guide rail at which the deviation exists according to the time point when the driving speed and the pressure value exceed the threshold value.
Through the arrangement, compared with the existing artificial laser sensor testing direction, the precision and the efficiency of detection are improved.
In the embodiment of the present invention, in order to implement verification on the same guide rail, after step S30, the method further includes the following steps:
s31: the detection assembly 20 is driven reversely, and the value of the pressure sensor during the reverse movement is recorded; therefore, the forward detection and the reverse detection can be realized, and the detection efficiency is improved;
specifically, after the forward detection of the first T-shaped hollow elevator guide rail to be detected accords with the standard, the second T-shaped hollow elevator guide rail to be detected is replaced by the second standard T-shaped hollow elevator guide rail, then the detection assembly 20 is driven reversely, and the first T-shaped hollow elevator guide rail is verified while the second T-shaped hollow elevator guide rail to be detected is detected. This kind of setting can realize on the one hand that two moves in positive and negative directions are detected two guide rails, and on the other hand can also realize detecting the both sides of same guide rail, promptly when first detection is errorless the back, replaces another of opposite side with waiting to detect, when reverse detection, can also check up the guide rail of this side, has improved the precision of detecting. Through the arrangement, one of the guide rails to be detected can be continuously replaced by the guide rail which is detected to be qualified, and then the old guide rail can be detected and confirmed for the second time when a new guide rail is detected, so that the detection precision and efficiency are improved.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a hollow elevator guide rail cross-section deviation testing arrangement of T type which characterized in that includes:
the support comprises a bottom plate, a portal frame and guide rail fixing pieces, the length direction of the portal frame is parallel to the length direction of the bottom plate, the portal frame is arranged at the center of the width direction of the bottom plate, and the guide rail fixing pieces are arranged at the positions of two sides of the portal frame and used for fixing the guide rails;
the detection assembly comprises two idler wheels, two swing arms and a moving piece, the two idler wheels are rotatably connected with the swing arms, the swing arms are connected with the moving piece, a cross beam of the portal frame is provided with a sliding groove extending towards the length direction of the portal frame, and the moving piece is movably arranged along the length direction of the sliding groove;
the patch type pressure sensor is fixed on two side walls of the sliding chute;
the driving piece is connected with the detection assembly and is used for driving the detection assembly to reciprocate in the sliding groove;
the moving member faces to pinch rollers are arranged on two sides of the direction of the patch type pressure sensor, the pinch rollers are attached to the patch type pressure sensor, and the idler wheels are attached to the side face of the guide rail to be detected.
2. The T-shaped hollow elevator guide rail section deviation testing device according to claim 1, wherein the driving member comprises a screw rod arranged in parallel with a cross beam of the portal frame and a motor driving the screw rod to rotate;
the bottom of the moving piece is also connected with a nut seat, and the nut seat is meshed with the screw rod.
3. The T-shaped hollow elevator guide rail section deviation testing device according to claim 2, characterized in that the swing arm is hinged to two sides of the nut seat, and a torsional spring is connected to the hinged position to ensure the fitting degree of the roller and the guide rail to be tested.
4. The T-shaped hollow elevator guide rail section deviation testing device according to claim 2, characterized in that the sliding groove is arranged on the upper surface of the cross beam of the portal frame, the bottom center position of the sliding groove is arranged in a penetrating manner, the nut seat is connected with the moving member through the bottom penetrating position, the moving member is provided with a pulley which is in rolling connection with the position where the bottom of the sliding groove is not penetrated, and the maximum distance of the two pulleys in the width direction is smaller than the width of the sliding groove.
5. The T-shaped hollow elevator guide rail section deviation testing device as claimed in claim 1, wherein the guide rail fixing member comprises a base, two crimping plates and a fastening member, the base and the crimping plates are provided with vertical threaded holes, the fastening member passes through the crimping plates and then is connected with the base, the two crimping plates are arranged in the vertical direction, when the web of the guide rail is vertically placed, the crimping plates are crimped on one side wing plate of the guide rail, and when the web of the guide rail is horizontally placed, the web of the guide rail is pressed between the two crimping plates.
6. The T-shaped hollow elevator guide rail section deviation testing device according to claim 1, characterized in that the bottom plate is further provided with a supporting member, the supporting member is arranged near a vertical upright column close to the portal frame, and the supporting member is used for supporting at least one end of the guide rail in the length direction.
7. The T-shaped hollow elevator guide rail section deviation testing device according to claim 1, characterized in that the pinch rollers are axially vertically arranged, and the axial outer side surfaces of the pinch rollers are arc-shaped.
8. The T-shaped hollow elevator guide rail section deviation testing device according to claim 7, characterized in that the moving member is further provided with a guide post arranged towards the width direction of the moving member, the guide post is connected with a sliding sleeve, the pinch roller is fixed at the end of the sliding sleeve, a compression spring is arranged between the sliding sleeve and the guide post, and the guide post and the sliding sleeve are limited through a straight hole.
9. A T-shaped hollow elevator guide rail section deviation testing method is characterized in that the T-shaped hollow elevator guide rail section deviation testing device according to any one of claims 1 to 8 is applied, and the method comprises the following steps:
s10: fixing two standard T-shaped hollow elevator guide rails on a bottom plate, and enabling two rollers to be attached to the inner side walls of the T-shaped hollow elevator guide rails;
s20: the detection assembly is driven to move along the length direction of a cross beam of the portal frame until a moving path covers the first two ends of the T-shaped hollow elevator guide rail;
s30: recording the pressure values sensed by the two pressure sensors;
s40: replacing one standard T-shaped hollow elevator guide rail with a T-shaped hollow elevator guide rail to be tested;
s50: after the driving detection assembly is reset, driving the detection assembly to move along the length direction of the cross beam of the portal frame again, and recording a second pressure value;
s60: and comparing the difference between the two pressure values, if the absolute value of the difference is greater than the threshold value, judging that the deviation exists on the section of the detected T-shaped hollow elevator guide rail, and judging the position of the T-shaped hollow elevator guide rail at which the deviation exists according to the time point when the driving speed and the pressure value exceed the threshold value.
10. The T-shaped hollow elevator guide rail section deviation testing method according to claim 9, characterized by further comprising the following steps after step S30:
s31: the detection assembly is driven reversely, and the value of the pressure sensor during reverse movement is recorded;
after the forward detection of the first T-shaped hollow elevator guide rail to be detected accords with the standard, the second T-shaped hollow elevator guide rail to be detected is replaced by the second standard T-shaped hollow elevator guide rail, then the detection assembly is driven reversely, and the first T-shaped hollow elevator guide rail is verified while the second T-shaped hollow elevator guide rail to be detected is detected.
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| CN202111234418.5A CN113670244B (en) | 2021-10-22 | 2021-10-22 | T-shaped hollow elevator guide rail section deviation testing device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115077356A (en) * | 2022-08-22 | 2022-09-20 | 蒂升电梯(中国)有限公司成都分公司 | Elevator guide rail straightness measuring device |
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Effective date of registration: 20230412 Address after: No. 18-69, Changwu Middle Road, Wujin District, Changzhou City, Jiangsu Province, 213,000 Patentee after: Jiangsu Jicui Zhongyi Technology Industry Development Co.,Ltd. Address before: 213155 No.6 Dongfang Road, Huangli Town, Wujin District, Changzhou City, Jiangsu Province Patentee before: MARAZZI (JIANGSU) ELEVATOR GUIDE RAIL CO.,LTD. |