Telescopic ladder

Abstract

The utility model relates to the technical field of ladders, and discloses a telescopic ladder, which comprises two support rods and horizontal treading rods, a plurality of ladder rods are symmetrically inserted in the two support rods, and two opposite ladder rods are fixedly connected with the horizontal treading rods through locking mechanisms; the locking mechanism comprises a hoop, a lock pin, a spring, a spring seat and a deflector rod, the hoop comprises a hoop body and a supporting block, the hoop body is clamped on the ladder rod, the two ends of the treading rod are inserted in the outer side of the supporting block, the lock pin is arranged in a mounting groove of the supporting block in a sliding mode, and the front end of the lock pin penetrates through the hoop body and the ladder rod and is matched with a positioning hole in the lower portion of the adjacent upper ladder rod; the spring seat is clamped at the rear end of the installation groove, the rear portion of the lock pin is inserted into the spring seat and abuts against the spring, the installation groove is rotationally provided with a shifting rod in a clamped mode, a color indicating block is clamped on the lock pin, and the treading rod is provided with a display hole corresponding to the color indicating block. The ladder is convenient and reliable to stretch and retract, the locking mechanism can quickly determine the locking or unlocking state through vision, and the locking mechanism and the ladder rods can be quickly mounted and positioned.

Description

TECHNICAL FIELD

[0001] The utility model relates to ladder technical field especially relates to a telescopic ladder. BACKGROUND

[0002] The existing ladder usually includes the crosspiece supported between the multiple columnar ladder poles. In some cases, the ladder can be a telescopic ladder, and can be unfolded to separate the ladder poles from each other to extend the ladder, or folded together to retract the ladder. When the ladder is opened or folded, whether the two adjacent ladder poles are locked by the locking mechanism cannot be quickly determined by vision, which easily leads to safety accidents. Moreover, the connection between the ladder pole and the locking mechanism is relatively complex, and needs to be fixed by a pin, which is relatively cumbersome. Moreover, the pin is easy to loosen and fall off during the use of the ladder, which affects the reliability and service life of the ladder. SUMMARY

[0003] The utility model provides a telescopic ladder, this ladder is convenient and reliable to extend, contract, and the locking mechanism can be quickly determined by vision to lock or unlock state, and the ladder is safe and reliable to use, which effectively protects the personal safety of the user. The locking mechanism and the ladder pole can be quickly installed and positioned.

[0004] The above-mentioned object of the utility model is realized by the following technical scheme:

[0005] A telescopic ladder, comprising two vertical support poles, the bottom of the two support poles is provided with a horizontal stepping pole, the two ends of the stepping pole are respectively fixedly connected between the two support poles, a plurality of ladder poles are symmetrically inserted into the two support poles, and the two opposite ladder poles are fixedly connected by a locking mechanism and a horizontal stepping pole. The locking mechanism comprises a clamp, a locking pin, a spring, a spring seat and a lever, the clamp comprises a clamp body and a support block fixedly connected thereto, the clamp body is sleeved and clamped on the ladder pole, the stepping pole is a hollow square tube, the two ends of the stepping pole are inserted and fixedly connected outside the support block, the bottom of the support block is provided with a mounting groove, the locking pin is slidably arranged in the mounting groove, the front end of the locking pin penetrates through the clamp body and the ladder pole and is matched with the positioning hole in the lower part of the adjacent upper ladder pole, the spring seat is clamped at the rear end of the mounting groove, the front end of the spring seat is provided with a containing hole for containing the spring, the rear part of the locking pin is inserted into the containing hole and abuts against the spring, the front part of the locking pin is provided with a stop ring abutting against the clamp body, the lever is rotatably clamped in the middle part of the mounting groove, one end of the lever abuts against the front side of the stop ring, and when the lever is pressed down, one end of the lever pushes the locking pin to move towards the spring seat, so as to realize the unlocking between the two adjacent ladder poles. The middle part of the locking pin is clamped with a color indicating block, and the stepping pole is provided with a display hole corresponding to the color indicating block.

[0006] The telescopic ladder described above, wherein the inside top of the clamp body is provided with a stepped ring with a neck, and the top end of the ladder pole abuts against the stepped ring.

[0007] The telescopic ladder, wherein the hoop body is provided with a pair of inverted U-shaped isolation grooves in the circumferential direction, the inner wall of the hoop body in the isolation grooves is provided with a buckle part protruding inward, and the upper part of the ladder rod is provided with a clamping hole corresponding to the buckle part.

[0008] The telescopic ladder, wherein the spring seat is in the shape of a cross as a whole, the spring seat comprises a cylindrical seat body and a clamping strip vertically connected to the middle part of the seat body, the clamping strip is clamped on the supporting block, and the accommodating hole is located at the front end of the seat body and is coaxially arranged with the seat body.

[0009] The telescopic ladder, wherein the middle part of the locking pin is provided with a first clamping shaft with a neck, one side of the color indicating block is provided with a C-shaped clamping groove matched with the first clamping shaft, the side part of the supporting block is provided with a through groove corresponding to the color indicating block, and the through groove corresponds to the display hole; the color indicating block is provided with a red part and a green part from front to back along the length direction of the locking pin, when the locking pin passes through the ladder rod and is inserted into the positioning hole at the lower end of the adjacent upper ladder rod, the display hole is opposite to the green part, and when the locking pin is separated from the positioning hole at the lower end of the adjacent upper ladder rod, the display hole is opposite to the red part.

[0010] The telescopic ladder, wherein the middle part of the locking pin is provided with a first clamping shaft with a neck, one side of the color indicating block is provided with a C-shaped clamping groove matched with the first clamping shaft, the side part of the supporting block is provided with a through groove corresponding to the color indicating block, and the through groove corresponds to the display hole; the color indicating block is provided with a red part and a green part from front to back along the length direction of the locking pin, when the locking pin passes through the ladder rod and is inserted into the positioning hole at the lower end of the adjacent upper ladder rod, the display hole is opposite to the green part, and when the locking pin is separated from the positioning hole at the lower end of the adjacent upper ladder rod, the display hole is opposite to the red part.

[0011] The telescopic ladder, wherein the upper part of the supporting block is provided with a supporting block close to one side of the hoop body, and the bottom of the supporting block is provided with an isolation block directly below the supporting block.

[0012] The telescopic ladder, wherein the bottom of the supporting block is provided with an embedding groove, the isolation block is embedded in the embedding groove, and the isolation block is made of flexible material.

[0013] The telescopic ladder, wherein the upper surface of the stepping rod is arc-shaped in the width direction, and a plurality of parallel anti-skid protrusions are arranged on the upper surface of the stepping rod in the length direction.

[0014] The telescopic ladder, wherein the two ends of the stepping rod are respectively provided with reinforcing blocks, and the reinforcing blocks are respectively connected with the stepping rod and the adjacent supporting rod.

[0015] In summary, the beneficial technical effects of the telescopic ladder are as follows:

[0016] The color indicating block is arranged in the locking mechanism, the locking mechanism is quickly determined whether to be locked or unlocked through vision, and therefore the safety and reliability of the ladder are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structure schematic diagram when the utility model is collected;

[0018] Figure 2 is the partial sectional view of the locking mechanism locked state of the utility model;

[0019] Figure 3 is the partial sectional view of the locking mechanism unlocked state of the utility model;

[0020] Figure 4 is the structure schematic diagram of the utility model's hoop.

[0021] Fig., 1, support pole;2, tread pole;3, ladder pole;31, positioning hole;4, locking mechanism;41, hoop;411, hoop body;4111, ladder ring;4112, isolation groove;4113, buckle part;412, support block;4121, installation groove;4122, through groove;4123, supporting block;42, lock pin;421, baffle ring;422, first clamping shaft;423, second clamping shaft;43, spring;44, spring seat;441, seat body;4411, containing hole;442, clamping strip;45, push rod;451, clamping shaft;5, tread rod;51, display hole;52, anti-skid convex strip;53, restraint belt;6, color indicating block;61, red part;62, green part;7, isolation block;8, reinforcing block;9, handle. DETAILED DESCRIPTION

[0022] The following will be combined with the Figures 1-4 The utility model makes further detailed description.

[0023] As Figure 1 Indicated, a telescopic ladder, including two vertical support poles 1, the bottom of two support poles 1 is equipped with horizontal tread pole 2, and the both ends of tread pole 2 are fixedly connected between two support poles 1, and a plurality of ladder poles 3 are symmetrically inserted and installed in two support poles 1, the ladder pole 3 is cylindrical, and the outer diameter of a plurality of ladder poles 3 decreases successively from bottom to top;The upper ladder pole 3 in adjacent two ladder poles 3 is inserted in the inner cavity of lower ladder pole 3, and the opposite two ladder poles 3 are fixedly connected through locking mechanism 4 and horizontal tread rod 5.

[0024] As Figure 1 , 2The locking mechanism 4 includes a clamp 41, a locking pin 42, a spring 43, a spring seat 44 and a push rod 45, as shown in FIGS. 4, 5 and 6. The clamp 41 includes a clamp body 411 and a support block 412 fixed to the clamp body 411. The clamp body 411 is sleeved on the ladder rod 3. The stepping rod 5 is a hollow square tube. The two ends of the stepping rod 5 are inserted and fixed outside the support block 412. The bottom of the support block 412 is provided with a mounting groove 4121. The locking pin 42 is slidably arranged in the mounting groove 4121. The front end of the locking pin 42 penetrates through the clamp body 411 and the ladder rod 3 and is adapted to the positioning hole 31 in the lower part of the adjacent upper ladder rod 3. The spring seat 44 is clamped at the rear end of the mounting groove 4121. The front end of the spring seat 44 is provided with a containing hole 4411 for containing the spring 43. The rear part of the locking pin 42 is inserted into the containing hole 4411 and abuts against the spring 43. The front part of the locking pin 42 is provided with a stop ring 421 abutting against the clamp body 411. The mounting groove 4121 is rotatably clamped with the push rod 45. One end of the push rod 45 is clamped on the locking pin 42. When the push rod 45 is pressed down, the push rod 45 can push the locking pin 42 to move towards the spring seat 44, so as to realize the unlocking between the adjacent two ladder rods 3. Under the action of gravity, the upper ladder rod 3 can slide into the adjacent lower ladder rod 3. The color indicating block 6 is also clamped on the locking pin 42. The stepping rod 5 is provided with a display hole 51 corresponding to the color indicating block 6. When the locking pin 42 moves, the color indicating block 6 can be driven to move. The color of the color indicating block 6 in the display hole 51 can be observed to determine whether the locking mechanism 4 is in the locked state or the unlocked state, so as to improve the safety of using the ladder.

[0025] As shown in FIGS. 4, 5 and 6, Figure 2 , 4 The inside top of the clamp body 411 is provided with a stepped ring 4111 with a neck. The top end of the ladder rod 3 abuts and clamps with the stepped ring 4111.

[0026] The clamp body 411 is provided with a pair of inverted U-shaped isolation grooves 4112 in the circumferential direction. The inner wall of the clamp body 411 in the isolation groove 4112 is provided with an inwardly protruding buckle part 4113. Since the buckle part 4113 is only connected with the ladder rod 3 at the bottom, the buckle part 4113 has a certain elasticity. The upper part of the ladder rod 3 is provided with a clamping hole corresponding to the buckle part 4113 (not shown in the figure). When the clamp 41 is installed, the clamp body 411 is only needed to be sleeved on the top of the ladder rod 3 and the buckle part 4113 is clamped in the clamping hole of the ladder rod 3, so as to realize the quick installation of the clamp 41.

[0027] As shown in FIGS. 4, 5 and 6, Figure 2 , 4 The spring seat 44 is in the shape of a cross as a whole. The spring seat 44 includes a cylindrical seat body 441 and a clamping strip 442 vertically fixed in the middle of the seat body 441. The clamping strip 442 is clamped on the support block 412. The containing hole 4411 is located at the front end of the seat body 441 and is coaxially arranged with the seat body 441.

[0028] As shown in FIGS. 4, 5 and 6, Figure 2 ,4 As shown, the middle of the locking pin 42 is provided with a first clamping shaft 422 with a neck, and one side of the color indicating block 6 is provided with a C-shaped clamping slot matched with the first clamping shaft 422. The color indicating block 6 is made of a certain elastic plastic material, and the side of the supporting block 412 is provided with a through groove 4122 corresponding to the color indicating block 6. The through groove 4122 corresponds to the display hole 51 on the stepping rod 5.

[0029] The color indicating block 6 is provided with a red part 61 and a green part 62 from front to back along the length direction of the locking pin 42. When the ladder is retracted, the locking pin 42 is separated from the positioning hole 31 at the lower end of the adjacent upper ladder rod 3. At this time, the display hole 51 is opposite to the red part 61, and the user can observe the color of the red part 61 of the color indicating block 6 through the display hole 51 and the through groove 4122, indicating that the locking mechanism 4 is in an unlocked state. When the upper ladder rod 3 of the adjacent two ladder rods 3 is pulled upward, the locking pin 42 passes through the ladder rod 3 and is inserted into the positioning hole 31 at the lower end of the adjacent upper ladder rod 3. The retaining ring 421 can limit the depth of the locking pin 42 inserted into the positioning hole 31, and can limit the locking pin 42. At this time, the display hole 51 is opposite to the green part 62, indicating that the locking mechanism 4 is in a locked state.

[0030] As shown in the figure, Figures 2-4 The locking pin 42 is provided with a second clamping shaft 423 with a neck at the rear side of the first clamping shaft 422. One end of the push rod 45 is provided with a U-shaped clamping slot, and the U-shaped clamping slot is embedded in the second clamping shaft 423. The push rod 45 is provided with a clamping shaft 451 perpendicular thereto, and the clamping shaft 451 is clamped on the supporting block 412.

[0031] Figure 3 As shown in the figure, the locking mechanism is in an unlocked state. The push rod 45 is pressed towards the supporting block 412, and the push rod 45 rotates clockwise around the clamping shaft 451. The one end of the push rod 45 inserted into the second clamping shaft 423 overcomes the elastic force of the spring 43, pushes the locking pin 42 to the right, and makes the front end of the locking pin 42 separate from the positioning hole 31 at the lower part of the adjacent upper ladder rod 3, thereby realizing the unlocking of the locking mechanism 4. The adjacent upper ladder rod 3 and the ladder rod 3 therebetween can slide relative to each other, and the ladder can be retracted under the weight of the upper ladder rod 3.

[0032] The upper part of the supporting block 412 close to the clamping hoop body 411 is provided with a supporting block 4123, and the bottom of the supporting block 412 and below the supporting block 4123 is provided with a separation block 7.

[0033] When the ladder is retracted, the supporting block 4123 between the adjacent two stepping rods 5 abuts against the separation block 7, thereby ensuring that the adjacent two stepping rods 5 maintain a certain distance when they are retracted, avoiding being clamped to the user's hand.

[0034] As shown in the figure, Figure 4As shown in the drawings, the bottom of the support block 412 of the embodiment is provided with an embedding groove, and the isolation block 7 is embedded in the embedding groove, and the isolation block 7 is made of flexible material.

[0035] As shown in the drawings, in order to improve the comfort of the ladder use and improve the friction of the stepping rod 5, the upper surface of the stepping rod 5 is arc-shaped along the width direction, and the upper surface of the stepping rod 5 is provided with a plurality of parallel anti-skid convex strips 52 along the length direction. Figure 2

[0036] As shown in the drawings, in order to improve the strength between the support rod 1 and the stepping rod 2, the stepping rod 2 is respectively provided with a reinforcing block 8 at both ends, and the reinforcing block 8 is respectively fixedly connected with the stepping rod 2 and the adjacent support rod 1. Figure 1

[0037] Figure 1 As shown in the drawings, in the embodiment, the bottom of the stepping rod 5 at the lowermost end of the ladder is provided with a handle 9 and a binding belt 53, and when the ladder is folded, the clasp on the binding belt 53 can realize the limiting and fixing of a plurality of stepping rods 5, so as to ensure the safe transportation and storage of the ladder; when the ladder is carried, the ladder can be carried through the handle 9, so as to improve the experience of the user.

[0038] The embodiments of the specific embodiment are the preferred embodiments of the utility model, and are not limited to the protection scope of the utility model, so that: all equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.​​

Claims

1. A telescopic ladder comprising two vertical support poles, the bottom of the two support poles being provided with a horizontal step pole, the two ends of the step pole being fixed between the two support poles, characterized in that, Two said support rods are symmetrically inserted with several ladder rods, and two opposite ladder rods are fixedly connected with horizontal stepping rods through locking mechanisms; the locking mechanism comprises a clamp, a locking pin, a spring, a spring seat and a lever, the clamp comprises a clamp body and a support block fixedly connected with the clamp body, the clamp body is sleeved on the ladder rod, the stepping rod is a hollow square tube, the two ends of the stepping rod are inserted and fixedly connected outside the support block, the bottom of the support block is provided with a mounting groove, the locking pin is slidably arranged in the mounting groove, the front end of the locking pin penetrates through the clamp body and the ladder rod and is matched with the positioning hole in the lower part of the adjacent upper ladder rod, the spring seat is clamped at the rear end of the mounting groove, the front end of the spring seat is provided with a receiving hole for accommodating the spring, the rear part of the locking pin is inserted into the receiving hole and abuts against the spring, the front part of the locking pin is provided with a stop ring abutting against the clamp body, the lever is rotatably clamped in the middle part of the mounting groove, one end of the lever is clamped on the locking pin, when the lever is pressed down, the lever can push the locking pin to move towards the spring seat, so as to realize the unlocking between the two adjacent ladder rods; the color indicating block is also clamped on the locking pin, and the stepping rod is provided with a display hole corresponding to the color indicating block.

2. Telescoping ladder according to claim 1, characterized in that The inner top of the clamp body is provided with a stepped ring with a necking.

3. The telescoping ladder of claim 1, wherein, The clamp body is provided with a pair of inverted U-shaped isolation grooves in the circumferential direction, the inner wall of the clamp body in the isolation groove is provided with an inwardly protruding buckle part, and the upper part of the ladder rod is provided with a clamping hole corresponding to the buckle part.

4. The telescoping ladder of claim 1, wherein, The spring seat is in the shape of a cross as a whole, the spring seat comprises a cylindrical seat body and a clamping strip vertically fixed in the middle part of the seat body, the clamping strip is clamped on the support block, and the receiving hole is located at the front end of the seat body and is coaxially arranged with the seat body.

5. The telescoping ladder of claim 1, wherein, The middle part of the locking pin is provided with a first clamping shaft with a necking, one side of the color indicating block is provided with a C-shaped clamping groove matched with the first clamping shaft, the side part of the support block is provided with a through groove corresponding to the color indicating block, and the through groove corresponds to the display hole; the color indicating block is provided with a red part and a green part from front to back along the length direction of the locking pin, when the locking pin penetrates through the ladder rod and is inserted into the positioning hole in the lower end of the adjacent upper ladder rod, the display hole is opposite to the green part, and when the locking pin is separated from the positioning hole in the lower end of the adjacent upper ladder rod, the display hole is opposite to the red part.

6. The telescoping ladder of claim 5, wherein, The rear side of the locking pin is provided with a second clamping shaft with a necking, one end of the lever is provided with a U-shaped clamping groove, the U-shaped clamping groove is embedded in the second clamping shaft, the lever is provided with a rotating shaft perpendicular thereto, and the rotating shaft is rotatably clamped on the support block.

7. The telescoping ladder of claim 1, wherein, The side of the upper part of the support block close to the clamp body is provided with a supporting block, and the bottom of the support block and below the supporting block is provided with an isolation block.

8. The telescoping ladder of claim 7, wherein, The bottom of the support block is provided with an embedded groove, the isolation block is embedded in the embedded groove, and the isolation block is made of flexible material.

9. The telescoping ladder of claim 1, wherein, The upper surface of the stepping rod is arc-shaped in the width direction, and the upper surface of the stepping rod is provided with several parallel anti-skid protrusions in the length direction.

10. The telescoping ladder of claim 1, wherein, The two ends of the stepping rod are respectively provided with reinforcing blocks, and the reinforcing blocks are respectively fixedly connected with the stepping rod and the adjacent support rod.

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