TELESCOPIC PIPE BUFFER STRUCTURE

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a telescopically extendable and collapsible ladder, and more particularly to a telescopic pipe buffer structure.

BACKGROUND OF THE INVENTION

[0002] Currently, the existing telescopic ladder includes two adjacent ladder legs and rungs disposed between the ladder legs. Each of the ladder legs includes a plurality of nested ladder sections which are able to slide relatively to each other to realize a telescopic function of the telescopic ladder. Sometimes, it is necessary to fix a top of the telescopic ladder to a wall or a beam. When in use, the lowermost section of the telescopic ladder is pulled down, and the lower section of the telescopic ladder drives the upper section to gradually unfold the entire telescopic ladder downward. When not in use, the lowermost section of the telescopic ladder is pushed upwards, so that the upper section is inserted into the lower section to fold the entire telescopic ladder. However, during the above-mentioned unfolding or folding process, there is no buffer effect between the adjacent upper section and the lower section. Therefore, when the lower section slides down relatively to the upper section, under the tension and gravity, the telescopic ladder is unfolded too fast thereby causing safety problems. For the existing telescopic ladder hanged on the wall or beam, the buffer effect between the upper section and the lower section is poor, and there are deficiencies in safety issues. Therefore, the existing telescopic ladder lacks safety and it is inconvenient to use. Chinese patent CN206129129U describes that a buffer guiding structure for an extension tube includes an inner tube, an outer tube, and a buffer member, and the inner tube is slidably sleeved into the outer tube. The buffer member is disposed at an end surface of the inner tube. An edge of the buffer member engages with an outer edge of the inner tube and abuts against an inner wall of the outer tube, such that when the inner tube extends outwardly, the buffer member is scrolled downwards to reduce a friction force, and when the inner tube retracts inwardly, the buffer member remains slidably abutting against the inner wall of the outer tube, thereby realizing buffer function.

SUMMARY OF THE INVENTION

[0003] One objective of the present invention is to provide a telescopic pipe buffer structure with simple structure, good buffer effect and high safety performance.

[0004] To achieve the above-mentioned objective, the present invention provides a telescopic pipe buffer structure includes an inner tube, an outer tube, a buffer plate, and a guard plate. The inner tube is slidably sleeved into the outer tube, and the guard plate is disposed at an end of the inner tube. Furthermore, an accommodating groove is formed between the guard plate and an end surface of the inner tube. The telescopic pipe buffer structure further includes a guide sleeve fixed to an end surface of the inner tube, the guide sleeve is directly opposite to the buffer plate, and the accommodating groove is located between the guide sleeve and the buffer plate. The buffer plate is disposed on the guard plate and located on a side of the guard plate close to the accommodating groove. Furthermore, an edge of the buffer plate is abutted against an inner wall of the outer tube, so that while the inner tube is inserted into the outer tube, the edge of the buffer plate is scrolled into the accommodating groove; and while the outer tube is pushed to make the inner tube extend outwardly from the outer tube, the buffer plate keeps slidably abutting against the inner wall of the outer tube to realize a buffer function.

[0005] In comparison with the prior art, a guard plate is provided at one end of the inner tube, and an accommodating groove is formed between the guard plate and an end surface of the inner tube, and a buffer plate is disposed on a side of the guard plate close to the accommodating groove. Furthermore, an edge of the buffer plate abuts against an inner wall of the outer tube, so that while the telescopic ladder is folded, the edge of the buffer plate is scrolled upwards into the accommodating groove thereby reducing friction; and while the telescopic ladder is unfolded, the guard plate blocks the buffer plate and the buffer plate keeps slidably abutting against the inner wall of the outer tube to realize a buffer function. The telescopic pipe buffer structure has a simple structure and good buffer effect, and can prevent the inner tube of the telescopic ladder from quickly extending outwardly thereby effectively improving safety performance of the telescopic ladder.

[0006] The guide sleeve is arranged to guide the inner tube while the inner tube slides relatively to the outer tube.

[0007] Preferably, the buffer plate is a silica gel piece. Silicone material is elastic and deformable and has a large friction coefficient, which can increase a large frictional force and improve the buffer effect during use.

[0008] Specifically, the accommodating groove is surrounded the inner tube.

[0009] Specifically, the inner tube and the outer tube are triangular tubes.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] 

Fig. 1 is a structure schematic showing a telescopic ladder installed on a beam according to one embodiment of the present invention;

Fig. 2 is an exploded view of a telescopic pipe buffer structure according to one embodiment of the present invention;

Fig. 3 is a partial section view of the telescopic pipe buffer structure when the telescopic ladder is unfold; and

Fig. 4 is a partial section view of the telescopic pipe buffer structure when the telescopic ladder is fold.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

[0011] A distinct and full description of the technical solution of the present invention will follow by combining with the accompanying drawings.

[0012] Referring to Figs. 2 and 3, the telescopic pipe buffer structure 100 includes an inner tube 1 and an outer tube 2, and the inner tube 1 is slidably sleeved into the outer tube 2. Specifically, the inner tube 1 and the outer tube 2 are triangular tubes. The telescopic pipe buffer structure 100 further includes a buffer plate 3, a guard plate 4, and a guide sleeve 5. More specifically, the cross sections of the buffer plate 3, the guard plate 4, and the guide sleeve 5 correspond to the cross section of the inner tube 1. The guard plate 4 is fixed at an end of the inner tube 1 by screws 7. Furthermore, an accommodating groove 6 surrounding the inner tube 1 is formed between the guard plate 4 and an end surface of the inner tube 1. Furthermore, the guide sleeve 5 is fixed to the end surface of the inner tube 1 and close to the accommodating groove 6, so both the guide sleeve 5 and the buffer plate 3 directly face to the accommodating groove 6. The guide sleeve 5 is arranged to guide the inner tube 1 while the inner tube 1 slides relatively to the outer tube 2. Specifically, the buffer plate 3 is disposed on the guard plate 4 and located at a side of the guard plate 4 close to the accommodating groove 6. Furthermore, an edge of the buffer plate 3 is abutted against an inner wall of the outer tube 2, so that while the inner tube 1 is inserted into the outer tube 2, the edge of the buffer plate 3 is scrolled into the accommodating groove 6; and while the outer tube 2 is pushed to make the inner tube 1 extend outwardly from the outer tube 2, the edge of the buffer plate 3 keeps slidably abutting against the inner wall of the outer tube 2 to realize a buffer function.

[0013] Preferably, the buffer plate 3 is a silica gel piece. Silicone material is elastic and deformable and has a large friction coefficient, which can increase a large frictional force and improve the buffer effect during use.

[0014] As shown in Fig. 1 and Fig. 3, an upper end of the telescopic ladder 200 is fixed to a beam 300, and when the telescopic ladder 200 is unfolded, the lowermost section of the telescopic ladder 200 firstly extends downwards. Therefore, the outer tube 2 slides downward relative to the inner tube 1, at the beginning of the sliding, the edge of the buffer plate 3 slides against the inner wall of the outer tube 2 and has a tendency to deform downwardly as the outer tube 2 slides. However, because the buffer plate 3 is blocked by the guard plate 4 below, the edge of the buffer plate 3 can only abut against the inner wall of the outer tube 2 and generate great frictional resistance. Thus, the buffer plate 3 hinders the outer tube 2 from sliding downward thereby achieving a buffering effect on the outer tube 2. As shown in Fig. 4, when the telescopic ladder 200 is folded, the lowermost section of the telescopic ladder 200 is folded upwards. Therefore, the outer tube 2 slides upward relative to the inner tube 1, at the beginning of the sliding, the edge of the buffer plate 3 slidably abuts against the inner wall of the outer tube 2 and deforms upward as the outer tube 2 slides. Because the accommodating groove 6 is located above the buffer plate 3, the edge of the buffer plate 3 will be scrolled upwards into the accommodating groove 6 so as to reduce the frictional resistance. Thus, the outer tube 2 can be nested to the inner tube 1 quickly and smoothly to achieve fold the telescopic ladder 200.

[0015] In comparison with the prior art, a guard plate 4 is provided at one end of the inner tube 1, and an accommodating groove 6 is formed between the guard plate 4 and an end surface of the inner tube 1, and a buffer plate 3 is disposed on a side of the guard plate 4 close to the accommodating groove 6. Furthermore, an edge of the buffer plate 3 abuts against an inner wall of the outer tube 2, so that while the telescopic ladder 200 is folded, the edge of the buffer plate 3 is scrolled upwards into the accommodating groove 6 thereby reducing friction. While the telescopic ladder 200 is unfolded, the guard plate 4 blocks the buffer plate 3 and the buffer plate 3 keeps slidably abutting against the inner wall of the outer tube 2 to realize a buffer function. The telescopic pipe buffer structure 100 has a simple structure and good buffer effect, and can prevent the inner tube 1 of the telescopic ladder 200 from quickly extending outwardly thereby effectively improving safety performance of the telescopic ladder 200.

Claims

1. A telescopic pipe buffer structure (100), comprising an inner tube (1), an outer tube (2), a buffer plate (3), and a guard plate (4), wherein the inner tube (1) is slidably sleeved into the outer tube (2), the guard plate (4) is disposed at an end of the inner tube (1), an accommodating groove (6) is formed between the guard plate (4) and an end surface of the inner tube (1), the telescopic pipe buffer structure (100) further comprises a guide sleeve (5) fixed to an end surface of the inner tube (1), the guide sleeve (5) is directly opposite to the buffer plate (3), and the accommodating groove (6) is located between the guide sleeve (5) and the buffer plate (3), the buffer plate (3) is disposed on the guard plate (4) and located on a side of the guard plate (4) close to the accommodating groove (6), an edge of the buffer plate (3) is abutted against an inner wall of the outer tube (2), so that while the inner tube (1) is inserted into the outer tube (2), the edge of the buffer plate (3) is scrolled into the accommodating groove (6); and while the outer tube (2) is pushed to make the inner tube (1) extend outwardly from the outer tube (2), the buffer plate (3) keeps slidably abutting against the inner wall of the outer tube (2) to realize a buffer function.

2. The telescopic pipe buffer structure (100) according to claim 1, wherein the buffer plate (3) is a silica gel piece.

3. The telescopic pipe buffer structure (100) according to claim 1, wherein the accommodating groove (6) is surrounded the inner tube (1).

4. The telescopic pipe buffer structure (100) according to claim 1, wherein the inner tube (1) and the outer tube (2) are triangular tubes.

Ansprüche

1. Teleskoprohrpufferstruktur (100), umfassend ein Innenrohr (1), ein Außenrohr (2), eine Pufferplatte (3) und eine Schutzplatte (4), wobei das Innenrohr (1) gleitend in das Außenrohr (2) geschoben ist, die Schutzplatte (4) an einem Ende des Innenrohrs (1) angeordnet ist, eine Aufnahmenut (6) zwischen der Schutzplatte (4) und einer Endfläche des Innenrohrs (1) gebildet ist, die Teleskoprohrpufferstruktur (100) ferner eine Führungshülse (5) umfasst, die an einer Endfläche des Innenrohrs (1) fixiert ist, wobei die Rührungshülse (5) der Pufferplatte (3) direkt gegenüberliegt und die Aufnahmenut (6) zwischen der Führungshülse (5) und der Pufferplatte (3) angeordnet ist, die Pufferplatte (3) sich auf der Schutzplatte (4) befindet und an einer Seite der Schutzplatte (4) nahe der Aufnahmenut (6) angeordnet ist, eine Kante der Pufferplatte (3) an eine Innenwand des Außenrohrs (2) stößt, sodass die Kante der Pufferplatte (3) in die Aufnahmenut (6) geschoben ist, während das Innenrohr (1) in das Außenrohr (2) eingesetzt ist; und während das Außenrohr (2) geschoben wird, sodass veranlasst wird, dass sich das Innenrohr (1) aus dem Außenrohr (2) nach außen erstreckt, die Pufferplatte (3) weiterhin gleitend an die Innenwand des Außenrohrs (2) stößt, um eine Pufferfunktion zu realisieren.

2. Teleskoprohrpufferstruktur (100) nach Anspruch 1, wobei die Pufferplatte (3) ein Silikagelstück ist.

3. Teleskoprohrpufferstruktur (100) nach Anspruch 1, wobei die Aufnahmenut (6) das Innenrohr (1) umgibt.

4. Teleskoprohrpufferstruktur (100) nach Anspruch 1, wobei das Innenrohr (1) und das Außenrohr (2) dreieckige Rohre sind.

Revendications

1. Structure tampon à tuyaux télescopiques (100), comprenant un tube interne (1), un tube externe (2), une plaque tampon (3) et une plaque de garde (4), dans laquelle le tube interne (1) est manchonné à coulissement dans le tube externe (2), la plaque de garde (4) est disposée à une extrémité du tube interne (1), une rainure d'hébergement (6) est formée entre la plaque de garde (4) et une surface d'extrémité du tube interne (1), la structure tampon à tuyaux télescopiques (100) comprend en outre un manchon de guidage (5) fixé à une surface d'extrémité du tube interne (1), le manchon de guidage (5) est directement en face de la plaque tampon (3), et la rainure d'hébergement (6) est située entre le manchon de guidage (5) et la plaque tampon (3), la plaque tampon (3) est disposée sur la plaque de garde (4) et située sur un côté de la plaque de garde (4) proche de la rainure d'hébergement (6), un bord de la plaque tampon (3) est en butée contre une paroi interne du tube externe (2) de sorte que, tandis que le tube interne (1) est inséré dans le tube externe (2), le bord de la plaque tampon (3) est défilé dans la rainure d'hébergement (6) ; et tandis que le tube externe (2) est poussé pour faire s'étendre le tube interne (1) vers l'extérieur depuis le tube externe (2), la plaque tampon (3) continue de buter à coulissement contre la paroi interne du tube externe (2) pour réaliser une fonction tampon.

2. Structure tampon à tuyaux télescopiques (100) selon la revendication 1, dans laquelle la plaque tampon (3) est une pièce de gel de silice.

3. Structure tampon à tuyaux télescopiques (100) selon la revendication 1, dans laquelle la rainure d'hébergement (6) est entourée du tube interne (1).

4. Structure tampon à tuyaux télescopiques (100) selon la revendication 1, dans laquelle le tube interne (1) et le tube externe (2) sont des tubes triangulaires.

Drawing