CN106593290A - Locking device capable of conducting double-way rotation operation for combination ladder - Google Patents
Locking device capable of conducting double-way rotation operation for combination ladder Download PDFInfo
- Publication number
- CN106593290A CN106593290A CN201611218794.4A CN201611218794A CN106593290A CN 106593290 A CN106593290 A CN 106593290A CN 201611218794 A CN201611218794 A CN 201611218794A CN 106593290 A CN106593290 A CN 106593290A
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- ladder
- rod
- shaped lock
- lock pin
- locking
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000009194 climbing Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/06—Securing devices or hooks for parts of extensible ladders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
Disclosed is a locking device capable of conducting double-way rotation operation for a combination ladder. The locking device comprises fixed blocks and handle blocks; rod-shaped lock pins penetrate through the fixed blocks correspondingly; and the inner ends of the rod-shaped lock pins penetrate through the locking holes formed in an outer ladder body and an inner ladder body to complete locking of the combination ladder. The handle blocks are rotatably arranged on the outer sides of the fixed blocks in a sleeving mode. The outer ends of the rod-shaped lock pins are fixedly arranged on the inner sides of the handle blocks to enable the handle blocks to rotate on the fixed blocks with the rod-shaped lock pins as shafts. Springs are further arranged on the rod-shaped lock pins in a sleeving mode, the inner ends of the springs are positioned at the inner ends of the rod-shaped lock pins, and the outer ends of the springs are positioned in the fixed blocks, wherein the outer surfaces of the fixed blocks are inclined to form convex positioning portions, and concave positioning grooves are formed in the inner surfaces, corresponding to the convex positioning portions, of the handle blocks. When the handle blocks rotate, through squeezing and abutting of the positioning portions and the positioning grooves, the handle blocks are forced to overcome pulling force of the springs and produce axial displacement outward while rotating. According to the locking device capable of conducting double-way rotation operation for the combination ladder, the quantity of parts is significantly reduced, the double-way rotation operation can be realized, and operation convenience is improved.
Description
Technical Field
The invention relates to a combined ladder, in particular to a combined ladder with adjustable height.
Background
The ladder is a common tool for climbing, and a straight ladder or a herringbone ladder is common. In most cases, ladders meet the user's climbing needs, but in some cases, such as when the user needs to climb to a height that exceeds the limits of the ladder, the ladder does not meet the climbing needs.
In order to solve the problem, the industry invented a combined ladder, which comprises an inner ladder and an outer ladder, wherein the ladder posts of the outer ladder are sleeved on the ladder posts of the inner ladder to form the outer ladder which can slide up and down on the inner ladder, so as to achieve the function of increasing the overall climbing limit of the ladder. In order to lock the position of the ladder legs of the outer ladder on the ladder legs of the inner ladder, a locking device is usually provided between the ladder legs of the inner and outer ladders. The traditional locking device structure is characterized in that elastic lock pins are arranged on the outer sides of two ladder posts of the outer ladder, a plurality of positioning holes are formed in the ladder posts of the inner ladder along the length direction of the ladder posts, and the outer ladder and the inner ladder are positioned by utilizing the elasticity of the elastic lock pins to be matched with the positioning holes at different height positions in a self-locking manner. The conventional locking device finds the following problems in long-term use: firstly, for the pursuit of reliability of locking, the spring of the elastic lock pin is required to have enough tension, so that when the ladder is used for adjusting the height, unlocking of the locking device is very inconvenient; secondly, if the ladder is required to be adjusted to be high, the spring of the elastic lock pin cannot have too large tension, so that the reliability of locking is reduced.
Accordingly, the applicant filed a patent entitled "a height adjustable combination ladder" on 2016, 01, 19, with the invention application number of 201610033751.2. This patent overcomes the above-mentioned contradiction between the reliability of locking and the convenience of operation in the prior art, but it is also found by designers that the following disadvantages exist: firstly, the structure is complex: the number of parts is large, and the material cost is improved; meanwhile, the assembly is inconvenient, time and labor are wasted, the labor cost is increased, and the production efficiency is reduced; secondly, only one-way unlocking and locking can be realized, and limitation is brought to the convenience of operation.
Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.
Disclosure of Invention
It is an object of the present invention to provide a bi-directionally rotatably operable locking device for a ganged ladder.
In order to achieve the purpose, the invention adopts the technical scheme that:
a bi-rotatably operable locking arrangement for a ganged ladder, the ganged ladder comprising an inner ladder, an outer ladder, the locking arrangement for locking the inner ladder and the outer ladder; the ladder post of the outer ladder is sleeved on the ladder post of the inner ladder, an outer locking hole is formed in the ladder post of the outer ladder along the thickness direction of the ladder post, and a plurality of inner locking holes are formed in the ladder post of the inner ladder along the length direction of the ladder post of the inner ladder corresponding to the outer locking hole; the locking device is fixedly arranged at the outer locking hole on the ladder column of the outer ladder, and the purpose of positioning the position relation of the inner ladder and the outer ladder is achieved by simultaneously locking the outer locking hole and one inner locking hole, namely the locking of the paired combined ladder is achieved;
the locking device comprises a fixed block and a handle block; wherein,
the fixed block is fixedly arranged on the ladder post of the outer ladder, a rod-shaped lock pin penetrates through the fixed block and is perpendicular to the ladder post of the outer ladder, and the axis of the rod-shaped lock pin is coaxially arranged with the hole center of the outer locking hole; the rod-shaped lock pin reciprocates in the fixed block along the inner and outer directions of the ladder post, and the inner end of the rod-shaped lock pin extends into or moves out of the inner locking hole through the outer locking hole; when the inner end of the rod-shaped lock pin extends into the inner locking hole through the outer locking hole, the locking device is in a locking state for the outer ladder and the inner ladder of the combined ladder; when the outer end of the rod-shaped lock pin moves out of the inner locking hole through the outer locking hole, the outer ladder and the inner ladder of the combined ladder are in an unlocking state by the locking device;
the handle block is rotatably sleeved outside the fixed block and is provided with a handheld part; the outer end of the rod-shaped lock pin extends out of the fixed block and is fixedly arranged on the inner side of the handle block to form the handle block which rotates on the fixed block by taking the rod-shaped lock pin as a shaft;
the rod-shaped lock pin is sleeved with a spring, the inner end of the spring abuts against and is positioned at the inner end of the rod-shaped lock pin, and the outer end of the spring abuts against and is positioned at the inner side of the fixed block; when the combined ladder is in a locking state, the rod-shaped lock pin extends inwards into the inner locking hole, the spring is in a completely extended state, and when the combined ladder is in an unlocking state, the handle block drives the rod-shaped lock pin to move outwards, and the spring is in a completely compressed state;
the two symmetrical surfaces of the outer surface of the fixed block are obliquely arranged and are folded outwards to form a convex positioning part on the outer surface of the fixed block; the inner surface of the handle block is provided with an inwards concave positioning groove corresponding to the outwards convex positioning part; when the handle block rotates, the handle block is pressed against the positioning groove through the extrusion of the positioning part and the positioning groove, the handle block is forced to overcome the tensile force of a spring on the rod-shaped lock pin to generate axial displacement outwards, and meanwhile, the inner end of the rod-shaped lock pin is driven to move out of the inner locking hole, so that the combined ladder is unlocked.
The relevant content in the above technical solution is explained as follows:
1. in the above scheme, the outer end of the rod-shaped lock pin is fixedly arranged on the inner side of the handle block through a positioning pin, and the positioning pin penetrates through the outer end of the rod-shaped lock pin and the handle block simultaneously.
2. In the scheme, the convex positioning part is formed by obliquely arranging two symmetrical surfaces on the outer surface of the fixing block, the handle block for realizing the locking device can be unlocked no matter clockwise or anticlockwise rotated, and the locking device can return to the original locking state position after being rotated by 180 degrees, so that the operation of a user is facilitated.
3. In the above scheme, the positioning groove of indent and the location portion of evagination are through inlaying the group cooperation, not only make handle piece and fixed block combine more stably, reliably when locking device's locking state to when carrying out the unblock operation, the handle piece can turn into axial displacement with the rotation motion comparatively easily, and does not receive the direction of rotation influence, and two-way all can easily rotate the unblock promptly.
4. In the above scheme, the outer edges of the two sides of the handle block are respectively provided with a clamping groove along the vertical direction of the positioning groove; when the handle block rotates to the unlocking position, the clamping groove is buckled on the positioning part of the fixed block in a clamping mode, so that the unlocking state is maintained, and the convenience and the reliability of use of a user are improved.
The working principle and the advantages of the invention are as follows:
the invention relates to a locking device capable of rotating in two directions for a combined ladder, which comprises a fixed block and a handle block, wherein the fixed block is fixed on the fixed block; a rod-shaped lock pin penetrates through the fixed block, and the inner end of the rod-shaped lock pin penetrates through the locking holes of the outer ladder and the inner ladder to lock the combined ladder; the handle block is rotatably sleeved outside the fixed block, and the outer end of the rod-shaped lock pin is fixedly arranged inside the handle block to form a handle block which rotates on the fixed block by taking the rod-shaped lock pin as an axis; the rod-shaped lock pin is also sleeved with a spring, the inner end of the spring is positioned at the inner end of the rod-shaped lock pin, and the outer end of the spring is positioned at the fixed block; wherein, the outer surface of the fixed block is obliquely provided with a convex positioning part, and the inner surface of the handle block is provided with a concave positioning groove corresponding to the convex positioning part; when the handle block rotates, the handle block is forced to overcome the pulling force of the spring and generate axial displacement outwards while rotating through the extrusion and the abutting of the positioning part and the positioning groove, and the inner end of the rod-shaped lock pin is taken out, so that the combined ladder is unlocked. Compared with the prior art, the invention greatly simplifies the number of parts, not only reduces the material cost, but also reduces the production cost and improves the production efficiency; meanwhile, the outer convex positioning part and the inner concave positioning groove are formed in an ingenious inclined mode, so that the locking device can realize bidirectional rotation operation while the reliability of the locking state is guaranteed, and the use feeling and the operation convenience of a user are greatly improved. In conclusion, the invention has the advantages of simple structure and convenient use.
Drawings
FIG. 1 is a first schematic structural diagram (front view) of an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram (side view) of an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of the locking device of the embodiment of the present invention in a locked condition;
FIG. 4 is a partial cross-sectional view of a locking device in a locked condition in accordance with an embodiment of the present invention;
FIG. 5 is an enlarged fragmentary view of the locking device of the embodiment of the present invention in an unlocked condition;
FIG. 6 is a partial cross-sectional view of a locking device in an unlocked state in accordance with an embodiment of the present invention;
FIG. 7 is an exploded first view (unlocked state) of the locking device in an embodiment of the present invention;
fig. 8 is an exploded perspective view ii (unlocked state) of the locking device in the embodiment of the present invention.
In the above drawings: 1. an inner ladder; 2. an outer ladder; 3. an outer locking hole; 4. an inner locking hole; 5. a fixed block; 6. a handle block; 7. a rod-shaped lock pin; 8. a hand-held portion; 9. positioning pins; 10. a spring; 11. a bevel; 12. a positioning part; 13. positioning a groove; 14. a clamping groove.
Detailed Description
The invention is further described with reference to the following figures and examples:
example (b): referring to fig. 1 to 8, a bi-directionally rotatable locking device for a combination ladder comprises an inner ladder 1 and an outer ladder 2, wherein the height of the outer ladder 2 is adjustable in the vertical direction relative to the inner ladder 1. The locking device is used for locking the inner ladder 1 and the outer ladder 2; the ladder post of the outer ladder 2 is sleeved on the ladder post of the inner ladder 1, an outer locking hole 3 is formed in the ladder post of the outer ladder 2 along the thickness direction of the ladder post, and a plurality of inner locking holes 4 are formed in the ladder post of the inner ladder 1 along the length direction of the ladder post of the inner ladder 1 corresponding to the outer locking hole 3; the locking device is fixedly arranged at the outer locking hole 3 on the ladder post of the outer ladder 2, and the purpose of positioning the position relation of the inner ladder 1 and the outer ladder 2 is achieved by locking the outer locking hole 3 and one inner locking hole 4 at the same time, namely the locking of the paired combined ladders is achieved.
The locking device comprises a fixed block 5 and a handle block 6; the fixed block 5 is fixedly arranged on a ladder post of the outer ladder 2, a rod-shaped lock pin 7 penetrates through the fixed block 5, the rod-shaped lock pin 7 is perpendicular to the ladder post of the outer ladder 2, and the axis of the rod-shaped lock pin 7 is coaxially arranged with the hole center of the outer locking hole 3; the rod-shaped lock pin 7 reciprocates in the fixed block 5 along the inner and outer directions of the ladder column, and the inner end of the rod-shaped lock pin 7 extends into or moves out of the inner locking hole 4 through the outer locking hole 3; when the inner end of the rod-shaped lock pin 7 extends into the inner locking hole 4 through the outer locking hole 3, the locking device is in a locking state for the outer ladder 2 and the inner ladder 1 of the combined ladder; when the outer end of the rod-shaped lock pin 7 moves out of the inner locking hole 4 through the outer locking hole 3, the locking device is in an unlocking state for the outer ladder 2 and the inner ladder 1 of the combined ladder.
The handle block 6 is rotatably sleeved on the outer side of the fixed block 5 and is provided with a handheld part 8, and the handheld part 8 is used for a user to hold, apply force and rotate; the outer end of the rod-shaped lock pin 7 extends out of the fixed block 5 and is fixedly arranged on the inner side of the handle block 6 through a positioning pin 9, so that the handle block 6 rotates on the fixed block 5 by taking the rod-shaped lock pin 7 as a shaft.
The rod-shaped lock pin 7 is sleeved with a spring 10, the inner end of the spring 10 abuts against and is positioned at the inner end of the rod-shaped lock pin 7, and the outer end of the spring 10 abuts against and is positioned at the inner side of the fixed block 5; when the combined ladder is in a locking state, the rod-shaped lock pin 7 extends inwards into the inner locking hole 4, the spring 10 is in a fully extended state, and when the combined ladder is in an unlocking state, the handle block 6 drives the rod-shaped lock pin 7 to move outwards, and the spring 10 is in a fully compressed state.
Wherein, two symmetrical surfaces of the outer surface of the fixed block 5 are obliquely arranged to form two inclined surfaces 11 which are folded outwards, so that the cross section of the fixed block 5 is approximately triangular, and a convex positioning part 12 is formed on the outer surface of the fixed block 5; the inner surface of the handle block 6 is provided with a concave positioning groove 13 corresponding to the convex positioning part 12; when the handle block 6 and the fixed block 5 are locked, the positioning of the positioning groove 13 and the positioning part 12 is realized through the embedding and assembling matching of the positioning groove 13 and the positioning part 12, when the handle block 6 rotates clockwise or anticlockwise, the positioning part 12 is pressed against the positioning groove 13, the handle block 6 is forced to overcome the tensile force of the spring 10 on the rod-shaped lock pin 7 to generate axial displacement outwards, and meanwhile, the inner end of the rod-shaped lock pin 7 is driven to move out of the inner locking hole 4, so that the unlocking of the combined ladder is realized.
The outer edges of the two sides of the handle block 6 are respectively provided with a clamping groove 14 along the vertical direction of the positioning groove 13; when the handle block 6 is rotated to the unlocking position, the clamping groove 14 is buckled on the positioning part 12 of the fixed block 5, so that the unlocking state is maintained, and the convenience and the reliability of use of a user are improved.
The invention relates to a locking device capable of rotating in two directions for a combined ladder, which comprises a fixed block and a handle block, wherein the fixed block is fixed on the fixed block; a rod-shaped lock pin penetrates through the fixed block, and the inner end of the rod-shaped lock pin penetrates through the locking holes of the outer ladder and the inner ladder to lock the combined ladder; the handle block is rotatably sleeved outside the fixed block, and the outer end of the rod-shaped lock pin is fixedly arranged inside the handle block to form a handle block which rotates on the fixed block by taking the rod-shaped lock pin as an axis; the rod-shaped lock pin is also sleeved with a spring, the inner end of the spring is positioned at the inner end of the rod-shaped lock pin, and the outer end of the spring is positioned at the fixed block; wherein, the outer surface of the fixed block is obliquely provided with a convex positioning part, and the inner surface of the handle block is provided with a concave positioning groove corresponding to the convex positioning part; when the handle block rotates, the handle block is forced to overcome the pulling force of the spring and generate axial displacement outwards while rotating through the extrusion and the abutting of the positioning part and the positioning groove, and the inner end of the rod-shaped lock pin is taken out, so that the combined ladder is unlocked. Compared with the prior art, the invention greatly simplifies the number of parts, not only reduces the material cost, but also reduces the production cost and improves the production efficiency; meanwhile, the outer convex positioning part and the inner concave positioning groove are formed in an ingenious inclined mode, so that the locking device can realize bidirectional rotation operation while the reliability of the locking state is guaranteed, and the use feeling and the operation convenience of a user are greatly improved. In conclusion, the invention has the advantages of simple structure and convenient use.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (2)
1. A bi-rotatably operable locking arrangement for a ganged ladder, the ganged ladder comprising an inner ladder, an outer ladder, the locking arrangement for locking the inner ladder and the outer ladder; the ladder post of the outer ladder is sleeved on the ladder post of the inner ladder, an outer locking hole is formed in the ladder post of the outer ladder along the thickness direction of the ladder post, and a plurality of inner locking holes are formed in the ladder post of the inner ladder along the length direction of the ladder post of the inner ladder corresponding to the outer locking hole; the locking device is fixedly arranged at the outer locking hole on the ladder column of the outer ladder, and the purpose of positioning the position relation of the inner ladder and the outer ladder is achieved by simultaneously locking the outer locking hole and one inner locking hole, namely the locking of the paired combined ladder is achieved; the method is characterized in that:
the locking device comprises a fixed block and a handle block; wherein,
the fixed block is fixedly arranged on the ladder post of the outer ladder, a rod-shaped lock pin penetrates through the fixed block and is perpendicular to the ladder post of the outer ladder, and the axis of the rod-shaped lock pin is coaxially arranged with the hole center of the outer locking hole; the rod-shaped lock pin reciprocates in the fixed block along the inner and outer directions of the ladder post, and the inner end of the rod-shaped lock pin extends into or moves out of the inner locking hole through the outer locking hole; when the inner end of the rod-shaped lock pin extends into the inner locking hole through the outer locking hole, the locking device is in a locking state for the outer ladder and the inner ladder of the combined ladder; when the outer end of the rod-shaped lock pin moves out of the inner locking hole through the outer locking hole, the outer ladder and the inner ladder of the combined ladder are in an unlocking state by the locking device;
the handle block is rotatably sleeved outside the fixed block and is provided with a handheld part; the outer end of the rod-shaped lock pin extends out of the fixed block and is fixedly arranged on the inner side of the handle block to form the handle block which rotates on the fixed block by taking the rod-shaped lock pin as a shaft;
the rod-shaped lock pin is sleeved with a spring, the inner end of the spring abuts against and is positioned at the inner end of the rod-shaped lock pin, and the outer end of the spring abuts against and is positioned at the inner side of the fixed block; when the combined ladder is in a locking state, the rod-shaped lock pin extends inwards into the inner locking hole, the spring is in a completely extended state, and when the combined ladder is in an unlocking state, the handle block drives the rod-shaped lock pin to move outwards, and the spring is in a completely compressed state;
the two symmetrical surfaces of the outer surface of the fixed block are obliquely arranged and are folded outwards to form a convex positioning part on the outer surface of the fixed block; the inner surface of the handle block is provided with an inwards concave positioning groove corresponding to the outwards convex positioning part; when the handle block rotates, the handle block is pressed against the positioning groove through the extrusion of the positioning part and the positioning groove, the handle block is forced to overcome the tensile force of a spring on the rod-shaped lock pin to generate axial displacement outwards, and meanwhile, the inner end of the rod-shaped lock pin is driven to move out of the inner locking hole, so that the combined ladder is unlocked.
2. The locking device of claim 1, wherein: the outer edges of the two sides of the handle block are respectively provided with a clamping groove along the vertical direction of the positioning groove; when the handle block rotates to the unlocking position, the clamping groove is buckled on the positioning part of the fixed block, so that the unlocking state is maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218794.4A CN106593290A (en) | 2016-12-26 | 2016-12-26 | Locking device capable of conducting double-way rotation operation for combination ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611218794.4A CN106593290A (en) | 2016-12-26 | 2016-12-26 | Locking device capable of conducting double-way rotation operation for combination ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106593290A true CN106593290A (en) | 2017-04-26 |
Family
ID=58603988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611218794.4A Pending CN106593290A (en) | 2016-12-26 | 2016-12-26 | Locking device capable of conducting double-way rotation operation for combination ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106593290A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000027426A (en) * | 1998-07-14 | 2000-01-25 | Nippon Light Metal Co Ltd | Expansion leg with lock visual confirming mechanism |
| CN202673121U (en) * | 2012-05-25 | 2013-01-16 | 苏州飞华铝制工业有限公司 | Positioning device for telescoping of inner and outer ladder set |
| CN105221063A (en) * | 2015-10-23 | 2016-01-06 | 苏州飞华铝制工业有限公司 | A kind of locking device of combination ladder |
| CN105221064A (en) * | 2015-10-23 | 2016-01-06 | 苏州飞华铝制工业有限公司 | A kind of locking device of combination ladder |
| CN106337651A (en) * | 2016-10-28 | 2017-01-18 | 苏州飞华铝制工业有限公司 | Bilateral rotation operation locking device for combination ladder |
-
2016
- 2016-12-26 CN CN201611218794.4A patent/CN106593290A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000027426A (en) * | 1998-07-14 | 2000-01-25 | Nippon Light Metal Co Ltd | Expansion leg with lock visual confirming mechanism |
| CN202673121U (en) * | 2012-05-25 | 2013-01-16 | 苏州飞华铝制工业有限公司 | Positioning device for telescoping of inner and outer ladder set |
| CN105221063A (en) * | 2015-10-23 | 2016-01-06 | 苏州飞华铝制工业有限公司 | A kind of locking device of combination ladder |
| CN105221064A (en) * | 2015-10-23 | 2016-01-06 | 苏州飞华铝制工业有限公司 | A kind of locking device of combination ladder |
| CN106337651A (en) * | 2016-10-28 | 2017-01-18 | 苏州飞华铝制工业有限公司 | Bilateral rotation operation locking device for combination ladder |
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Application publication date: 20170426 |
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