CN2271192Y - Folding ladder with new-type joint - Google Patents

Abstract

The utility model relates to a folding ladder with a new-type joint. The joint of the utility model comprises two outer pieces and two inner pieces; a pin hole 11 and a pin hole 12 are respectively arranged on one end of each of the two outer pieces, and a pin hole 31 and a pin hole 41 are respectively arranged on one end of each of the two inner pieces; the two inner pieces are clamped between the two outer pieces. A resistance piece 50, an elastic element, a clamping block 60, another elastic element and a lever 62 which can be used for driving the clamping block are arranged between the two outer pieces near one side of each inner piece; a plurality of grooves 34 and 44 are arranged on the periphery of the top ends of the two inner pieces. A guide tube 12 and a guide tube 22 are extended form the hole edges of the pin holes of the two outer pieces to the inner side, a circular convex surface 32 and a circular convex surface 42 are arranged outside the two inner pieces, the pin holes are arranged on the centers of the circular convex surface 32 and the circular convex surface 42, and a guide tube 33 and a guide tube 43 are extended from the hole edges of the pin holes to the inner side. A concave circular arc 51 which is less than a central angle of 180 DEG is arranged on one end of the resistance piece 50, and a long guide hole 52 is arranged on the middle part of the resistance piece 50.

Description

Folding ladder with novel joint

The utility model relates to a kind of Folding ladder with novel joint, and this ladder improves the joint of traditional Folding ladder, make its become easy to assembly, save material, Folding ladder that cost is low.

The articulation structure of traditional Folding ladder exists Assembly part many, assembling inconvenience, the more high deficiency of cost.Accompanying drawing 5 is the decomposing schematic representations in traditional Folding ladder joint, accompanying drawing 6 is the combination schematic diagrames in traditional Folding ladder joint, the joint of tradition Folding ladder includes sheet 71 in two outer plates 70 and two, one end of its two interior sheet and two outer plates is provided with pin-and-hole 72, for riveted joint mutually, two interior sheets must be folded between two outer plates, close interior sheet one side place between two outer plates, be equipped with and resist sheet 73 and spring 730, clamping block 74 and spring 740, and but the tommy bar 75 of push card clamp dog is housed, sheet top peripheries are provided with several grooves 710 in two, are embedded in location in the groove for clamping block, control in two sheets thus and two outer plates relatively rotate or only fixed.This Folding ladder will produce following deficiency when implementing:

1, Assembly part is many, assembling inconvenience, cost of parts height; Within it in the assembly structure of outer plate, for guaranteeing that the inside and outside suitable contact surface of centre tool is to promote stability, it is the peritreme place formation rounded convex 720 that is positioned at pin-and-hole in the outer plate inner face, because outer plate is to be made by sheet metal, so its lateral surface will form circular concave, the pin-and-hole of adding outer plate forms outside conduit 722, be the smooth shape of tightening when making riveted, must add the pad 77 of an awl peviform, simultaneously, by riveting, the terminal car of bearing pin must be become form for ease of bearing pin 76 again, will increase manufacturing cost greatly thus than the roundlet footpath.

2, resist sheet and be used to fix interior sheet, be offset arbitrarily for avoiding resisting sheet, must be designed to the complete turn ring-type with resisting sheet, it is set on the formed rounded convex of outer plate, therefore cause waste of material, cost increases.

3, add the syndeton of formula, make and be difficult for, increase cost, this resists between sheet and the outer plate and is connected by spring 730, spring one end is placed in the socket part 731 of resisting sheet, and the spring other end then is placed on the backstay 702 that outer plate plants in addition, because outer plate adds and plants backstay, increase manufacture difficulty, caused the increase of cost.

The purpose of this utility model is to provide a kind of Folding ladder with novel joint, this Folding ladder simple and convenient assembly, save material, cost is lower.

The purpose of this utility model is achieved in that a kind of Folding ladder with novel joint, its joint includes two outer plates and two interior sheets, described two outer plates, one end is provided with pin-and-hole, sheet one end is provided with pin-and-hole in two, sheet is folded between two outer plates in two, close interior sheet one side place between two outer plates, be equipped with and resist sheet and connected flexible member, clamping block and flexible member, and but the tommy bar of push card clamp dog is housed, sheet top periphery is provided with several grooves in two, the pin-and-hole peritreme of two outer plates extends into conduit to the inside, there is a rounded convex in the sheet outside in two, and its center is provided with described pin-and-hole, and this pin-and-hole peritreme extends into conduit to the inside, resistance sheet one end has the concave arc less than 180 ° of central angles, and its middle part is provided with long guide hole.

That compared with the prior art the utility model has is easy to assembly, save material, lower-cost advantage.

The utility model is described in further detail below in conjunction with drawings and Examples

Fig. 1 decomposing schematic representation of the present utility model

Fig. 2 combination schematic diagram of the present utility model

Fig. 3 local constitutional diagram of the present utility model

Fig. 4 sectional view of the present utility model (Fig. 2 A-A analyses and observe)

The decomposing schematic representation in Fig. 5 tradition Folding ladder joint

The combination schematic diagram in Fig. 6 tradition Folding ladder joint

Referring to accompanying drawing 1, the joint of Folding ladder of the present utility model includes two outer plates 10,20 and two interior sheets 30,40, described two outer plates, one end is provided with pin-and- hole 11,21, sheet one end is provided with pin-and-hole 31 in two, 41, supply and marketing axle 1 passes this hole riveted joint, sheet is folded between two outer plates in two, close interior sheet one side place between two outer plates, be equipped with and resist sheet 50 and connected flexible member 54, clamping block 60 and flexible member 61, and but the tommy bar 62 of push card clamp dog is housed, described flexible member is a helical spring, sheet top periphery is provided with several grooves 34 in two, 44, be embedded in location in the groove for clamping block, can control in two sheets and two outer plates relatively rotate or only fixed, the lateral surface of two outer plates is flat, which is provided with described pin-and-hole, this pin-and-hole peritreme extends into conduit 12 to the inside, 22, there is a rounded convex 32 in the sheet outside in two, 42, its center is provided with described pin-and-hole, this pin-and-hole peritreme extends into conduit 33 to the inside, 43, resistance sheet 50 1 ends have the concave arc 51 less than 180 ° of central angles, and its middle part is provided with long guide hole 52.The radius of this concave arc just matches with the radius of interior sheet outside rounded convex, long guide hole can penetrate for dowel 23 on the outer plate 20, and resistance sheet one side is located for kelly 24 blockings of this outer plate 20, uses to reach purpose easy to assembly, that save material, reduce cost.

Referring to Fig. 1, Fig. 2, shown in Figure 4, during the utility model combination, to resist the medial surface (as shown in Figure 3) that sheet adheres on an outer plate 20 earlier, and in backstay 53 pocketed springs 54 1 ends that resist on the sheet, and with this spring in addition end be set on this outer plate, again clamping block, spring 61 and plate stem are installed on this outer plate, again sheets in two are amplexiformed on this outer plate after involutory, again that another outer plate 10 is involutory with it, and, be the utility model assembled state by bearing pin 1 rivet clasp.

According to above-mentioned structure design, the utility model also has following several advantage as can be seen:

1, smooth because of the lateral surface of its outer plate, interior sheet forms rounded convex, can get final product by the direct riveted of bearing pin, need not add the pad of awl peviform, the more terminal car of bearing pin need not be become than minor diameter, so the part simplification, simple and convenient assembly can effectively reduce the cost of part.

2, resist sheet and only have a simple concave arc, cooperate long guide hole, dowel and kelly can be stablized start, so can save material, reduce cost.

3, the inboard bent angle of outer plate 100,200 places at right angles bend, and the complete socket that can make progress of ladder straight-bar forms firm binding, need not development length, so can save material, reduce cost.

Claims (1)

1, a kind of Folding ladder with novel joint, its joint includes two outer plates (10,20) with two interior sheets (30,40), described two outer plates, one end is provided with pin-and-hole (11,21), sheet one end is provided with pin-and-hole (31 in two, 41), sheet is folded between two outer plates in two, close interior sheet one side place between two outer plates, be equipped with and resist sheet (50) and connected flexible member (54), clamping block (60) and flexible member (61), and but the tommy bar (62) of push card clamp dog is housed, sheet top periphery is provided with several grooves (34 in two, 44), it is characterized in that, the pin-and-hole peritreme of two outer plates extends into conduit (12 to the inside, 22), there is a rounded convex (32 in the sheet outside in two, 42), its center is provided with described pin-and-hole, this pin-and-hole peritreme extends into conduit (33 to the inside, 43), resistance sheet 50 1 ends have the concave arc (51) less than 180 ° of central angles, and its middle part is provided with long guide hole (52).

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