CN215565643U - Extension ladder with locking mechanism - Google Patents
Extension ladder with locking mechanism Download PDFInfo
- Publication number
- CN215565643U CN215565643U CN202121316301.7U CN202121316301U CN215565643U CN 215565643 U CN215565643 U CN 215565643U CN 202121316301 U CN202121316301 U CN 202121316301U CN 215565643 U CN215565643 U CN 215565643U
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- Prior art keywords
- ladder
- bar
- locking mechanism
- fixture block
- groove
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- Expired - Fee Related
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Abstract
The utility model discloses an extension ladder with locking mechanisms, which comprises a plurality of locking mechanisms, wherein each locking mechanism comprises a first clamping groove and a clamping piece; the first clamping grooves are formed in the ladder rods of the telescopic ladder sections; the chucking spare sets up in each on the ladder pole of flexible ladder section, the chucking spare includes fixture block, first elastic component, briquetting and stay cord, the fixture block activity set up in on the ladder pole, the one end of first elastic component with ladder pole fixed connection. The technical scheme provided by the utility model has the beneficial effects that: through set up first draw-in groove and fixture block on the ladder pole of each flexible ladder section, when a certain flexible ladder section was pulled out, the fixture block on the ladder pole of this flexible ladder section is gone into in the first draw-in groove on the ladder pole of adjacent flexible ladder section under the effect of first elastic component to can prevent flexible ladder section when trampled withdrawal, this device when using, does not need artifical manual locking each flexible ladder section, and the security is good.
Description
Technical Field
The utility model relates to the technical field of extension ladders, in particular to an extension ladder with a locking mechanism.
Background
In the distribution meter reading, rush-repair and substation equipment maintenance process, operating personnel often encounter the aerial work, and the frequency of adopting the ladder is more, and for making things convenient for the operation, the operating personnel can carry the extension ladder along with the car usually.
Present extension ladder includes the flexible ladder festival of a plurality of, each flexible ladder festival all includes two ladder poles and is located trampling the pole between two ladder poles, the back is pulled out to the ladder festival of will stretching out and drawing back, need to lock the fitting pin locking on the pole of trampling of flexible ladder festival just can prevent the flexible ladder festival withdrawal, therefore, when in-service use, need all stir the fitting pin on the pole of trampling of each flexible ladder festival to latched position just can guarantee operating personnel's safety, if part fitting pin is not stirred latched position or locking and is not in place, then easily lead to the operating personnel when trampling the extension ladder, flexible ladder festival withdrawal, thereby lead to the operating personnel to fall.
Therefore, the existing extension ladder has certain potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for a telescopic ladder with a locking mechanism, which is used to solve the technical problem that when part of locking pins of the conventional telescopic ladder is not shifted to a locking position or is not locked in place, operators are prone to falling down.
In order to achieve the purpose, the utility model provides an extension ladder with locking mechanisms, which comprises a plurality of extension ladder sections, a plurality of locking mechanisms and a plurality of locking mechanisms, wherein each extension ladder section comprises two ladder bars, a treading bar positioned between the two ladder bars, the locking mechanisms are used for locking the two adjacent extension ladder sections, and each locking mechanism comprises a first clamping groove and a clamping piece;
the first clamping grooves are formed in the ladder rods of the telescopic ladder sections;
the chucking spare set up in each on the ladder bar of flexible ladder section, the chucking spare includes fixture block, first elastic component, briquetting and stay cord, the fixture block activity set up in on the ladder bar, the one end of first elastic component with ladder bar fixed connection, the other end of first elastic component with fixture block fixed connection just is used for making in the fixture block card is gone into in the first draw-in groove on the ladder bar of adjacent flexible ladder section, the briquetting activity set up in step on the pole, the one end of stay cord with fixture block fixed connection, the other end of stay cord with briquetting fixed connection works as when the briquetting is pressed, the stay cord pulling the fixture block leaves in the first draw-in groove on the ladder bar of adjacent flexible ladder section.
Preferably, the clamping piece further comprises a second elastic piece, one end of the second elastic piece is fixedly connected with the corresponding stepping rod, and the other end of the second elastic piece is fixedly connected with the pressing piece.
Preferably, a guide groove is formed in the treading rod, the clamping block is slidably disposed in the guide groove, the second elastic member is located in the guide groove, one end of the second elastic member is fixedly connected with the inner wall of the guide groove, and the other end of the second elastic member is fixedly connected with the clamping block.
Preferably, the guide groove is opened on the lower end surface of the stepping rod.
Preferably, an accommodating groove is formed in the ladder bar, and the clamping block is slidably disposed in the accommodating groove.
Preferably, the ladder bar is further provided with a second clamping groove matched with the clamping block.
Preferably, a first wiring groove is formed in the ladder rod, a second wiring groove communicated with the first wiring groove is formed in the treading rod, and the pull rope is located in the first wiring groove and the second wiring groove.
Preferably, the clamping piece further comprises a first pulley, the first pulley is rotatably arranged in the first wiring groove, and the pulling rope is wound on the first pulley.
Preferably, the clamping piece further comprises a second pulley, the second pulley is rotatably arranged in the second wiring groove, and the pulling rope is wound on the second pulley.
Preferably, the telescopic ladder section located at the lowermost end further comprises a connecting rod, and two ends of the connecting rod are fixedly connected with the two ladder bars of the telescopic ladder section located at the lowermost end respectively.
Compared with the prior art, the technical scheme provided by the utility model has the beneficial effects that: through set up first draw-in groove and fixture block on the ladder pole of each flexible ladder section, when a certain flexible ladder section was pulled out, the fixture block on the ladder pole of this flexible ladder section is gone into in the first draw-in groove on the ladder pole of adjacent flexible ladder section under the effect of first elastic component to can prevent flexible ladder section when trampled withdrawal, this device when using, does not need artifical manual locking each flexible ladder section, and the security is good.
Drawings
FIG. 1 is a front view of one embodiment of a telescopic ladder with a locking mechanism provided in the present invention;
FIG. 2 is a front view of the two telescoping ladder sections of FIG. 1 at the lowermost end;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a cross-sectional view taken along section A-A of FIG. 3;
FIG. 5 is a partial enlarged view of area B of FIG. 4;
FIG. 6 is an enlarged partial view of area C of FIG. 4;
FIG. 7 is an enlarged partial view of region D of FIG. 4;
in the figure: 1-telescopic ladder section, 2-locking mechanism, 11-ladder rod, 111-accommodating groove, 112-first wiring groove, 12-treading rod, 121-guide groove, 122-second wiring groove, 13-connecting rod, 21-first wiring groove, 22-clamping piece, 221-clamping block, 222-first elastic piece, 223-clamping block, 224-pulling rope, 225-second elastic piece, 226-second wiring groove, 227-first pulley and 228-second pulley.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the utility model and together with the description, serve to explain the principles of the utility model and not to limit the scope of the utility model.
Referring to fig. 1, fig. 1 is a front view of an embodiment of an extension ladder with a locking mechanism provided by the present invention, the extension ladder with the locking mechanism includes a plurality of extension ladder sections 1 and a plurality of locking mechanisms 2, each extension ladder section 1 includes two ladder bars 11 and a stepping bar 12 located between the two ladder bars 11, the locking mechanism 2 is used for locking two adjacent extension ladder sections 1, and each locking mechanism 2 includes a first engaging groove 21 and a fastening member 22.
Referring to fig. 1 to 5, the first engaging groove 21 is formed on the ladder bar 11 of each telescopic ladder section 1.
Referring to fig. 1 to 7, the fastening member 22 is disposed on the ladder bar 11 of each telescopic ladder section 1, the clamping member 22 comprises a clamping block 221, a first elastic member 222, a pressing block 223 and a pulling rope 224, the latch 221 is movably disposed on the ladder bar 11, one end of the first elastic member 222 is fixedly connected with the ladder bar 11, the other end of the first elastic member 222 is fixedly connected with the latch 221 and is used for enabling the latch 221 to be latched into the first latching slot 21 on the ladder bar 11 of the adjacent telescopic ladder section 1, the pressing block 223 is movably disposed on the treading lever 12, one end of the pulling rope 224 is fixedly connected with the latch 221, the other end of the pulling rope 224 is fixedly connected with the pressing block 223, when the pressing piece 223 is pressed, the pulling rope 224 pulls the latch 221 away from the first catch 21 on the ladder bar 11 of the adjacent telescopic ladder section 1.
When using, pull out the flexible ladder section 1 of a certain amount in proper order as required, when flexible ladder section 1 is in the pull-out state, fixture block 221 card on the ladder bar 11 of this flexible ladder section 1 goes into in the first draw-in groove 21 on the ladder bar 11 of adjacent flexible ladder section 1, thereby can prevent this flexible ladder section 1 and withdraw into adjacent flexible ladder section 1 when trampling, when this flexible ladder section 1 of needs withdrawal, only need press briquetting 223, make stay cord 224 tensioning, thereby stay cord 224 stimulates fixture block 221 and leaves first draw-in groove 21, again with flexible ladder section 1 push down adjacent flexible ladder section 1 in can.
The utility model has the beneficial effects that: through setting up first draw-in groove 21 and fixture block 221 on the ladder pole 11 of each flexible ladder section 1, when a flexible ladder section 1 was pulled out, the fixture block 221 on the ladder pole 11 of this flexible ladder section 1 is gone into the first draw-in groove 21 on the ladder pole 11 of adjacent flexible ladder section 1 under the effect of first elastic component 222 to can prevent flexible ladder section 1 and withdraw when trampled, this device is when using, does not need artifical manual locking each flexible ladder section 1, and the security is good.
In order to reset the pressing piece 223 after being released from being pressed, referring to fig. 4 and 7, in a preferred embodiment, the clamping member 22 further includes a second elastic member 225, one end of the second elastic member 225 is fixedly connected to the corresponding stepping bar 12, the other end of the second elastic member 225 is fixedly connected to the pressing piece 223, and when the pressing piece 223 is released from being pressed, the pressing piece 223 is reset under the elastic restoring force of the second elastic member 225.
In order to limit the pressing block 223, referring to fig. 4 and 7, in a preferred embodiment, a guide groove 121 is formed on the treading rod 12, the fixture block 221 is slidably disposed in the guide groove 121, the second elastic member 225 is located in the guide groove 121, one end of the second elastic member 225 is fixedly connected to an inner wall of the guide groove 121, and the other end of the second elastic member 225 is fixedly connected to the fixture block 221. Carry on spacingly through the guide way 121 to briquetting 223 to when pressing briquetting 223, briquetting 223 can remove along guide way 121, thereby can improve briquetting 223 and remove the stability of process, improve the convenience in use of this device.
In order to prevent the pressing block 223 from being touched by mistake, referring to fig. 4 and 7, in a preferred embodiment, the guide groove 121 is opened on the lower end surface of the stepping rod 12, so that the pressing block 223 is not pressed when the operator steps on the stepping rod 12, thereby improving the safety of the device.
In order to limit the latch 221, referring to fig. 4 and 5, in a preferred embodiment, the ladder bar 11 is provided with a receiving groove 111, the latch 221 is slidably disposed in the receiving groove 111, and by disposing the receiving groove 111, the latch 221 is limited by the receiving groove 111 during movement and can only move along the extending direction of the receiving groove 111, thereby improving the stability of the device.
In order to keep the telescopic ladder section 1 locked in the retracted state, referring to fig. 4 and 5, in a preferred embodiment, the ladder bar 11 is further provided with a second engaging groove 226 matched with the engaging block 221, when the telescopic ladder section 1 is in the retracted state (the state shown in fig. 1-7), the engaging block 221 is engaged in the second engaging groove 226, so that the telescopic ladder section 1 is kept locked in the retracted state, when the device is transported, the telescopic ladder cannot automatically extend to facilitate transportation and carrying, when the telescopic ladder section 1 in the retracted state needs to be pulled out, the engaging block 223 is only pressed to tension the pulling rope 224, so that the pulling rope 224 pulls the engaging block 221 away from the second engaging groove 226, and then the telescopic ladder section 1 can be pulled out.
In order to prevent the pulling rope 224 from being accidentally bumped or wound, referring to fig. 4-7, in a preferred embodiment, the ladder bar 11 is provided with a first cabling channel 112, the treading bar 12 is provided with a second cabling channel 122 communicated with the first cabling channel 112, and the pulling rope 224 is located in the first cabling channel 112 and the second cabling channel 122. By bundling the pull rope 224 in the first wire slot 112 and the second wire slot 122, the pull rope 224 can be prevented from being accidentally bumped or wound, and the safety of the device is improved.
In order to reduce the friction force applied to the pulling rope 224 during the moving process, referring to fig. 4-7, in a preferred embodiment, the clamping member 22 further includes a first pulley 227, the first pulley 227 is rotatably disposed in the first cabling slot 112, and the pulling rope 224 is wound around the first pulley 227.
In order to reduce the friction force applied to the pulling rope 224 during the moving process, referring to fig. 4-7, in a preferred embodiment, the clamping member 22 further includes a second pulley 228, the second pulley 228 is rotatably disposed in the second cabling slot 122, and the pulling rope 224 is wound around the second pulley 228.
In order to improve the stability of the telescopic ladder, referring to fig. 1, in a preferred embodiment, the telescopic ladder section 1 at the lowermost end further includes a connecting rod 13, and two ends of the connecting rod 13 are respectively and fixedly connected to the two ladder bars 11 of the telescopic ladder section 1 at the lowermost end.
For a better understanding of the present invention, the operation of the extension ladder with locking mechanism provided by the present invention will be described in detail below with reference to fig. 1 to 7: when using, pull out the flexible ladder section 1 of a certain amount in proper order as required, when flexible ladder section 1 is in the pull-out state, fixture block 221 card on the ladder bar 11 of this flexible ladder section 1 goes into in the first draw-in groove 21 on the ladder bar 11 of adjacent flexible ladder section 1, thereby can prevent this flexible ladder section 1 and withdraw into adjacent flexible ladder section 1 when trampling, when this flexible ladder section 1 of needs withdrawal, only need press briquetting 223, make stay cord 224 tensioning, thereby stay cord 224 stimulates fixture block 221 and leaves first draw-in groove 21, again with flexible ladder section 1 push down adjacent flexible ladder section 1 in can.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. An extension ladder with locking mechanisms comprises a plurality of extension ladder sections, wherein each extension ladder section comprises two ladder bars and a treading bar positioned between the two ladder bars;
the first clamping grooves are formed in the ladder rods of the telescopic ladder sections;
the chucking spare set up in each on the ladder bar of flexible ladder section, the chucking spare includes fixture block, first elastic component, briquetting and stay cord, the fixture block activity set up in on the ladder bar, the one end of first elastic component with ladder bar fixed connection, the other end of first elastic component with fixture block fixed connection just is used for making in the fixture block card is gone into in the first draw-in groove on the ladder bar of adjacent flexible ladder section, the briquetting activity set up in step on the pole, the one end of stay cord with fixture block fixed connection, the other end of stay cord with briquetting fixed connection works as when the briquetting is pressed, the stay cord pulling the fixture block leaves in the first draw-in groove on the ladder bar of adjacent flexible ladder section.
2. The extension ladder with locking mechanism as claimed in claim 1, wherein said fastening member further comprises a second elastic member, one end of said second elastic member is fixedly connected to said corresponding stepping bar, and the other end of said second elastic member is fixedly connected to said pressing block.
3. The extension ladder with the locking mechanism as claimed in claim 2, wherein the stepping bar is provided with a guide slot, the locking block is slidably disposed in the guide slot, the second elastic member is disposed in the guide slot, one end of the second elastic member is fixedly connected to the inner wall of the guide slot, and the other end of the second elastic member is fixedly connected to the locking block.
4. The extension ladder with locking mechanism as claimed in claim 3, wherein said guide groove is opened on a lower end surface of said stepping bar.
5. The extension ladder with the locking mechanism as claimed in claim 1, wherein the ladder bar is provided with a receiving groove, and the locking block is slidably disposed in the receiving groove.
6. The extension ladder with the locking mechanism as claimed in claim 1, wherein the ladder bar is further provided with a second locking groove matched with the locking block.
7. The extension ladder with the locking mechanism as claimed in claim 1, wherein the ladder bar is provided with a first wire slot, the treading bar is provided with a second wire slot communicated with the first wire slot, and the pull rope is located in the first wire slot and the second wire slot.
8. The ladder with locking mechanism of claim 7, wherein said retainer further comprises a first pulley rotatably disposed within said first raceway, said pull cord being wound around said first pulley.
9. The ladder with locking mechanism of claim 7, wherein said retainer further comprises a second pulley rotatably disposed within said second raceway, said pull cord being wound around said second pulley.
10. The telescopic ladder with locking mechanism as claimed in claim 1, wherein the telescopic ladder sections at the lowermost end further comprise a connecting rod, and both ends of the connecting rod are fixedly connected with the two ladder bars of the telescopic ladder sections at the lowermost end, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121316301.7U CN215565643U (en) | 2021-06-11 | 2021-06-11 | Extension ladder with locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121316301.7U CN215565643U (en) | 2021-06-11 | 2021-06-11 | Extension ladder with locking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215565643U true CN215565643U (en) | 2022-01-18 |
Family
ID=79816936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121316301.7U Expired - Fee Related CN215565643U (en) | 2021-06-11 | 2021-06-11 | Extension ladder with locking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215565643U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116223225A (en) * | 2023-05-10 | 2023-06-06 | 山东和天下新材料有限公司 | PVC foaming regulator melt strength performance check out test set |
-
2021
- 2021-06-11 CN CN202121316301.7U patent/CN215565643U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116223225A (en) * | 2023-05-10 | 2023-06-06 | 山东和天下新材料有限公司 | PVC foaming regulator melt strength performance check out test set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220118 |