Novel herringbone ladder

Abstract

A novel herringbone ladder comprises a herringbone ladder body, the herringbone ladder body comprises two single ladders, connecting plates are integrally formed on the opposite sides of the tops of the two single ladders, two connecting rings are oppositely and integrally formed on the two connecting plates, a gap is reserved between the two connecting rings, and the size of the gap is matched with that of the connecting rings. The connecting rings on the two connecting plates are staggered and inserted into the interval between the two connecting plates, the four connecting rings are spliced to form a circular pipe, a shaft rod is inserted into the circular pipe, the two ends of the shaft rod penetrate out of the circular pipe and are fixedly provided with screw rods, external threads are arranged on the outer side walls of the screw rods, and the screw rods are sleeved with fixing sleeves. An internal thread matched with the external thread is arranged on the inner side wall of the fixing sleeve, and the external thread and the internal thread are right triangle threads and are opposite in thread direction. The tops of the two single ladders are stably connected, and the connecting process is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of ladders, in particular to a new type of folding ladder. Background Art

[0002] A folding ladder is composed of the top parts of two single ladders which are rotatably connected. In the prior art, hinges and bolts are generally used to hinge the top parts of the two single ladders. However, this connection method is not stable enough. After long-term use, there is a risk of bolt loosening and hinge detachment.

[0003] Therefore, the utility model proposes a technical solution, aiming to solve the problem that the connection between the top parts of the two single ladders is not stable enough, and there is a risk of bolt loosening and hinge detachment after long-term use. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a new type of folding ladder, aiming to achieve the technical effect of stable and convenient connection between the top parts of the two single ladders.

[0005] A new type of folding ladder includes a folding ladder body. The folding ladder body includes two single ladders. On one side of the top parts of the two single ladders opposite to each other, connecting plates are integrally formed. On the two connecting plates opposite to each other, two connecting rings are integrally formed. There is a gap between the two connecting rings. The size of the gap matches that of the connecting rings. The connecting rings on the two connecting plates are staggered and inserted into the gaps of each other. The four connecting rings are spliced to form a circular tube. A shaft rod is inserted into the circular tube. Both ends of the shaft rod penetrate out of the circular tube and are fixed with screw rods. External threads are provided on the outer side walls of the screw rods. A fixing sleeve is sleeved outside the screw rods. Internal threads matching the external threads are provided on the inner side walls of the fixing sleeve. Both the external threads and the internal threads are right triangle threads, and the thread directions are opposite.

[0006] By adopting the above technical solution, the connecting rings on the two connecting plates are inserted into the gaps between the connecting rings of each other, so that the four connecting rings are spliced to form a circular tube. Then the shaft rod is inserted into the circular tube. The screw rods at both ends of the shaft rod are located outside the circular tube. Then the fixing sleeve is sleeved outside the screw rods. By setting both the external threads and the internal threads as right triangle threads, and using the characteristic that the hypotenuses of the two right triangle threads face each other, the operation of direct pressing fit between the fixing sleeve and the screw rod can be realized, which is simpler and more convenient compared with the traditional slow screwing. The connecting rings can rotate around the shaft rod to realize the rotation between the two single ladders. And by blocking both ends of the shaft rod with the two fixing sleeves, the shaft rod will not fall out of the circular tube. Thus, the connection between the two single ladders is stable. The connection between the top parts of the two single ladders of the utility model is stable and the connection process is convenient.

[0007] Further setting of the present utility model: A limiting strip is integrally formed at the top end of the connecting ring.

[0008] By adopting the above technical solution, when the limiting strip contacts the connecting plate, the two single ladders cannot continue to rotate and unfold. This avoids the automatic rotation and unfolding of the two single ladders under the action of gravity when using the folding ladder body.

[0009] Further setting of the present utility model: An inclined strut is fixedly connected between the bottom end of the connecting plate and the top of the single ladder.

[0010] By adopting the above technical solution, the setting of the inclined strut improves the connection stability between the connecting plate and the single ladder.

[0011] Further setting of the present utility model: A through hole is provided on the inner bottom wall of the fixed sleeve, the cross-sectional shape of the through hole is rectangular, and a plug rod is fixed on the screw rod and inserted into the through hole in a mating connection manner.

[0012] By adopting the above technical solution, when the fixed sleeve is sleeved outside the screw rod, the plug rod is aligned with the through hole. After the fixed sleeve is completely sleeved outside the screw rod, the plug rod is completely inserted into the through hole. Since the cross-sectional shape of the through hole is rectangular, the fixed sleeve cannot rotate on the screw rod, thereby improving the connection stability between the fixed sleeve and the screw rod and preventing the fixed sleeve from falling off.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] A new type of folding ladder. The connecting rings on the two connecting plates are inserted into the intervals formed between the connecting rings of each other, so that the four connecting rings are spliced to form a circular tube. Then the shaft rod is inserted into the circular tube. The screw rods at both ends of the shaft rod are located outside the circular tube. Then the fixed sleeve is sleeved outside the screw rod. By setting both the external thread and the internal thread as right triangle threads, and using the characteristic that the hypotenuses of the two right triangle threads face each other, the operation of directly pressing and fitting between the fixed sleeve and the screw rod can be realized, which is simpler and more convenient compared with the traditional slow screwing. The connecting ring can rotate around the shaft rod to realize the rotation between the two single ladders. And by blocking both ends of the shaft rod with two fixed sleeves, the shaft rod will not fall out of the circular tube. Thus, the connection between the two single ladders is stable. The connection between the tops of the two single ladders of the present utility model is stable and the connection process is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a new type of folding ladder of the present utility model;

[0016] Figure 2 is Figure 1 the enlarged view of part A in

[0017] Figure 3Schematic diagram of the connection plate, connection ring, diagonal brace and limit strip in a new type of folding ladder of the present utility model;

[0018] Figure 4 Partial cross-sectional view of the connection ring, shaft rod, screw rod, insertion rod and fixing sleeve in a new type of folding ladder of the present utility model.

[0019] Reference numerals: 1, single ladder; 2, connection plate; 3, connection ring; 4, interval; 5, shaft rod; 6, screw rod; 7, external thread; 8, insertion rod; 9, fixing sleeve; 10, internal thread; 11, through hole; 12, limit strip; 13, diagonal brace. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] A new type of folding ladder, as Figures 1-4 shown, includes a folding ladder body. The folding ladder body includes two single ladders 1. On one side of the tops of the two single ladders 1 that face each other, connection plates 2 are integrally formed. On the two connection plates 2 that face each other, two connection rings 3 are integrally formed. There is a gap 4 reserved between the two connection rings 3. The size of the gap 4 matches that of the connection ring 3. The connection rings 3 on the two connection plates 2 are staggered and inserted into the gaps 4 of each other. The four connection rings 3 are spliced to form a circular tube. A shaft rod 5 is inserted into the circular tube. Both ends of the shaft rod 5 penetrate out of the circular tube and are fixed with screw rods 6. An external thread 7 is provided on the outer side wall of the screw rod 6. One end of the screw rod 6 that is away from the shaft rod 5 is fixed with an insertion rod 8. The shape of the insertion rod 8 is prismatic. A fixing sleeve 9 is sleeved outside the screw rod 6. An internal thread 10 that matches the external thread 7 is provided on the inner side wall of the fixing sleeve 9. Both the external thread 7 and the internal thread 10 are right triangle threads, and the thread directions are opposite. A through hole 11 for the insertion rod 8 to be inserted is provided on the fixing sleeve 9.

[0022] Additionally, a limit strip 12 is integrally formed at the top end of the connection ring 3. When the limit strip 12 contacts the connection plate 2, the two single ladders 1 cannot continue to rotate and unfold. This prevents the two single ladders 1 from automatically rotating and unfolding under the action of gravity when using the folding ladder body.

[0023] A diagonal brace 13 is fixedly connected between the bottom end of the connection plate 2 and the top of the single ladder 1. The setting of the diagonal brace 13 improves the connection stability between the connection plate 2 and the single ladder 1.

[0024] Working principle: Insert the connecting rings 3 on the two connecting plates 2 into the intervals 4 formed by inserting each other between the connecting rings 3, so that the four connecting rings 3 are spliced to form a circular tube. Then insert the shaft rod 5 into the circular tube. Make the screws 6 at both ends of the shaft rod 5 located outside the circular tube. Then align the insertion rod 8 with the through hole 11, and sleeved the fixing sleeve 9 outside the screw 6. After the fixing sleeve 9 is completely sleeved outside the screw 6, the insertion rod 8 is completely inserted into the through hole 11.

[0025] When sleeving the fixing sleeve 9 outside the screw 6, by setting both the external thread 7 and the internal thread 10 as right triangle threads, and using the characteristic that the hypotenuses of the two right triangle threads face each other, the operation of directly pressing and fitting between the fixing sleeve 9 and the screw 6 can be realized, which is simpler and more convenient compared with the traditional slow screwing.

[0026] After installation, the connecting ring 3 can rotate around the shaft rod 5 to realize the rotation between the two single ladders 1. And by blocking both ends of the shaft rod 5 with the two fixing sleeves 9, the shaft rod 5 will not fall out of the circular tube. And since the insertion rod 8 cannot rotate in the through hole 11, the fixing sleeve 9 cannot rotate on the screw 6, thereby improving the connection stability between the fixing sleeve 9 and the screw 6 and preventing the fixing sleeve 9 from falling off. Thus, the connection between the two single ladders 1 is stable. The connection between the tops of the two single ladders 1 of the present utility model is stable and the connection process is convenient.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "provided with", "sleeved / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel herringbone ladder, comprising a herringbone ladder body, wherein the herringbone ladder body comprises two single ladders (1), characterized in that: A connecting plate (2) is integrally formed on one side opposite to the top of the two single ladders (1), and two connecting rings (3) are integrally formed on the two connecting plates (2) opposite to each other. A gap (4) is reserved between the two connecting rings (3), and the size of the gap (4) matches the connecting ring (3). The connecting rings (3) on the two connecting plates (2) are staggered and inserted into each other's gaps (4). Four connecting rings (3) are spliced ​​to form a circular tube, and an axle (5) is inserted into the circular tube. Both ends of the axle (5) pass through the circular tube and are fixed with a screw (6). An external thread (7) is arranged on the outer wall of the screw (6), and a fixing sleeve (9) is arranged on the outer side of the screw (6). An internal thread (10) matching the external thread (7) is arranged on the inner wall of the fixing sleeve (9). The external thread (7) and the internal thread (10) are both right-angled triangle threads, and the thread directions are opposite.

2. A new type of herringbone ladder according to claim 1, characterized in that: A limiting strip (12) is integrally formed at the top end of the connecting ring (3).

3. The new type of herringbone ladder according to claim 1 is characterized in that: A diagonal bracing rod (13) is fixedly connected between the bottom end of the connecting plate (2) and the top of the single ladder (1).

4. The novel herringbone ladder according to claim 1 is characterized in that: A through hole (11) is provided on the inner bottom wall of the fixing sleeve (9), the cross-sectional shape of the through hole (11) is rectangular, and an insertion rod (8) is fixed on the screw rod (6) and inserted into the through hole (11) in a matching connection manner.

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