TW201435200A - Ladder - Google Patents

Abstract

The present invention mainly provides a ladder which comprises two ladder frames. One ends of the two ladder frames are connected and the opposite ends are separated. Each of the ladder frames comprises two rails opposite to each other and rungs are connected between the two rails. The invention is characterized in that each of the rails is provided, at a bottom thereof, with a first telescopic leg in such a way that the first telescopic leg and the rail are capable of relative movement of extension and contraction in order to adjust the length of the first telescopic leg extends out of the rail; a positioning mechanism arranged between the first telescopic leg and the rail. The positioning mechanism is provided for fixing the rail and the first telescopic leg or releasing the rail and the first telescopic leg. Through adjusting the lengths of the first telescopic leg extending out of the rails, the first telescopic leg of each of the rails may accommodate positional variation resulting from altitude difference to ensure the ladder can be firmly erected on an uneven surface, such as a stairway.

Description

ladder

The present invention relates to a ladder, and more particularly to a ladder that can adjust the height of the foot of the ladder to facilitate use on stairs or uneven terrain.

Due to the environmental factors of work, people often need to work at high places, such as wall, roof (ceiling) mud, woodworking or painting, etc., and these operations must rely on the ladder to work by climbing the ladder.

The current ladder 900 (or commonly referred to as an aluminum ladder) has two ladder frames 91 as shown in FIG. 10, and the two ladder frames 91 are hingedly connected at one end, and the other end is a free end, and the two ladder frames 91 are The connecting rods 92 are fastened together, and each of the ladder frames 91 is provided with a plurality of cross bars 93 for the user to step on.

The conventional ladder 900 is erected on a plane by using the ladder frame 91, such as on the ground, and is stepped on the crossbar 93 by the user to be used for work at a height. However, when encountering stairs or rugged terrain, the ladder 900 is useless.

Therefore, how to make the ladder can be used in stairwells or in uneven terrain is an important issue for this case.

In view of this, the present invention provides a stair or uneven terrain The ladder of work.

In order to achieve the above object, the technical means adopted by the present invention are as follows: a ladder of the present invention comprises: two ladder frames, the two ladder frames are connected at one end and separated at the other end, and each ladder frame has Two opposite brackets are disposed between the two brackets, wherein a cross bar is disposed at a bottom end of each bracket, and the first telescopic legs and the brackets can be extended and contracted Mutual movement to adjust the length of the first telescopic foot extending bracket, and a positioning mechanism between the first telescopic foot and the bracket, the positioning mechanism for fixing the bracket and the first telescopic foot or releasing the bracket and the first telescopic foot.

The above-mentioned ladder, wherein the positioning mechanism comprises: at least one positioning hole is arranged on the bracket; a plurality of perforations are arranged on the first telescopic leg; and a plug; a plurality of perforations of the first telescopic leg are available The positioning hole is aligned with the positioning hole of the bracket, and the positioning hole and the opposite perforation are inserted into the insertion end to fix the bracket and the first telescopic foot.

In the above ladder, a second telescopic leg is disposed at a bottom end of each of the first telescopic legs, and a fine adjustment mechanism is disposed between the second telescopic leg and the first telescopic leg to adjust the second telescopic foot to extend the first telescopic leg The length.

The above-mentioned ladder, wherein the fine adjustment mechanism comprises: a fixing seat disposed at a bottom end of the first telescopic foot, the fixing seat has an inner screw hole; and the external telescopic leg is provided with an external thread, the external thread is provided for the second The telescopic foot screw is connected to the screw hole in the fixing seat.

In the above ladder, the bottom end of the second telescopic foot is provided with a foot pad.

In the above ladder, the fixing seat is fixed inside the bottom end of the first telescopic foot.

In the above ladder, a connecting rod and a set of fasteners are arranged between the two ladder frames. When the two ladder frames are deployed, they are connected by a connecting rod and are fastened by a buckle group.

Compared with the conventional ladder, the ladder of the present invention has a first telescopic foot and a second telescopic foot, and the first telescopic foot can be used to extend the ladder when the ladder is placed at an uneven position such as a staircase. The length of the bracket enables the first telescopic legs of each bracket to adapt to different positional changes of the height difference. If there is a slight gap between the ground and the ground, the second telescopic foot can be passed through the length of the second telescopic leg. It is more compliant with the ground, and it makes the ladder more stable when it is placed on the uneven terrain such as stairs.

[习有]

900‧‧‧Ladder

91‧‧‧ ladder

92‧‧‧ linkage

93‧‧‧crossbar

【this invention】

100‧‧‧Ladder

11‧‧‧ ladder

21‧‧‧First telescopic foot

31‧‧‧ Positioning agency

12‧‧‧ bracket

13‧‧‧cross bar

14‧‧‧ Connecting rod

15, 16‧‧‧ buckle group

32‧‧‧Positioning holes

33‧‧‧Perforation

34‧‧‧ 插插

41‧‧‧Second telescopic foot

51‧‧‧ fine-tuning agency

52‧‧‧ Fixed seat

53‧‧‧Inner hole

54‧‧‧ external thread

42‧‧‧foot pads

43‧‧‧ bottom

60‧‧‧Stairs

61, 62‧‧‧ steps

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a preferred embodiment of the ladder of the present invention.

Figure 2 is a front view of Figure 1.

Figure 3 is a side view of Figure 1.

Fig. 4 is a perspective view showing the first telescopic foot retracted into the bracket in Fig. 1.

Figure 5 is a partial exploded view of Figure 1.

Figure 6 is a partial cross-sectional view showing the combination of the first telescopic leg and the second telescopic leg in the ladder of the present invention.

Figure 7 is a cross-sectional view showing the first telescopic leg, bracket and lance combination in the ladder of the present invention.

Figure 8 is a schematic view of one of the stairs used in the present invention.

Figure 9 is a schematic view of one of the stairs used in the present invention.

Figure 10 is a perspective view of an existing ladder.

In order to enable your review board to have a better understanding and recognition of the features and characteristics of this creation, the following preferred embodiments are illustrated with the following description: Please refer to Figures 1-7 for the comparison of the ladder 100 of the present invention. A preferred embodiment includes two ladder frames 11, four first telescopic legs 21, and four sets of positioning mechanisms 31.

One end of each of the ladder frames 11 in this embodiment is hingedly coupled together, and the other end of the ladder frame 11 is a free end of separation, and the two ladder frames 11 are hinged so that the free end can be separated into the folding room. Each of the ladder frames 11 has two opposite brackets 12, and a plurality of crossbars 13 are disposed between the two brackets 12. In addition, a link 14 is movably disposed on a ladder frame 11 A set of fastener sets 15, 16 are provided on the connecting rod 14 and the other ladder frame 11. When the two ladder frames 11 are deployed, they are connected by a connecting rod 14 and are attached by the buckle sets 15, 16. The buckle is fixed.

Each of the first telescopic legs 21 in the embodiment is disposed at a bottom end of each of the brackets 12. The first telescopic legs 21 and the bracket 12 are movable between the extension and the contraction to adjust the extension of the first telescopic legs 21 For the length of the bracket 12, as shown in Fig. 7, the cross section of the first telescopic leg 21 and the bracket 12 has a rectangular parallelepiped structure, but a triangular structure such as a U-shape may be used in practice. Preferred materials may be aluminum or aluminum alloy.

Please continue to show the fifth and seventh figures. In this embodiment, the positioning mechanism 31 The first telescopic leg 21 and the bracket 12 are disposed between the first telescopic leg 21 and the bracket 12 for fixing the bracket 12 and the first telescopic leg 21 or the bracket 12 and the first telescopic leg 21, and the bracket 12 is disposed on the bracket 12 At least one positioning hole 32, a plurality of through holes 33 disposed on the first telescopic leg 21, and a plug 34 that can be inserted into the positioning hole 32 and the through hole 33, and the plurality of the first telescopic legs 21 The through hole 33 is apt to be aligned with the positioning hole 32 of the bracket 12, and the insertion hole 34 is inserted into the positioning hole 32 and the pair of through holes 33 to fix the sliding movement between the bracket 12 and the first telescopic foot 21.

Further, as shown in FIG. 1 to FIG. 6 , in this embodiment, a second telescopic leg 41 is further disposed at a bottom end of each of the first telescopic legs 21 , and between the second telescopic legs 41 and the first telescopic legs 21 . A fine adjustment mechanism 51 is provided to adjust the length of the second telescopic foot 41 to extend out of the first telescopic leg 21.

As described above, the fine adjustment mechanism 51 includes a fixing base 52 disposed at a bottom end of the first telescopic leg 21, the fixing base 52 has an inner screw hole 53; and an external thread 54 is disposed on the second telescopic foot 41. The external thread 54 is screwed into the inner screw hole 53 of the fixing base 52.

As described above, in addition, a foot pad 42 is disposed at the bottom end of the second telescopic foot 41, and the material thereof may be rubber, silicone, plastic, etc., and the bottom surface 43 of the foot pad 42 is curved, which is convenient for each of the foot pads 42. The direction touches the ground.

The above is a description of the components of the ladder 100 and its assembly manner according to a preferred embodiment of the present invention, and then the features of its use are described as follows: Please refer to FIGS. 8 and 9 for the ladder 100 of the present invention. in A schematic diagram of the two states of use of the stair 60, and with reference to Figures 1-7, when the ladder 100 of the present invention stands on the stair 60, the two brackets 12 of the ladder 100 stand on a step 61, and the ladder 100 The two brackets 12 stand on the other step 62. By adjusting the first telescopic legs 21, the ladder 100 is maintained in a normal horizontal use state, and the perforations 33 corresponding to the positioning holes 32 are selected, and the insertion pins 34 are inserted into the positioning holes. In 32 and the corresponding perforation 33, the fixing is completed. If the ladder 100 is still somewhat unstable, the ladder 100 can be more conformed to the steps 61, 62 or the ground by rotating the fine adjustment mechanism 51 of the second telescopic foot 41, and is more stable.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all of the related art in the art according to the present invention are equivalent to the present invention. The scope of coverage.

100‧‧‧Ladder

11‧‧‧ ladder

21‧‧‧First telescopic foot

12‧‧‧ bracket

13‧‧‧cross bar

14‧‧‧ Connecting rod

15, 16‧‧‧ buckle group

33‧‧‧Perforation

34‧‧‧ 插插

41‧‧‧Second telescopic foot

Claims (7)

A ladder comprising: two ladder frames, one end of which is joined together and the other end is separated, each ladder frame has two opposite brackets, and a cross bar is arranged between the two brackets The first telescopic leg is disposed at a bottom end of each bracket, and the first telescopic foot and the bracket can move between the extension and the contraction to adjust the length of the first telescopic foot to extend the bracket, and A positioning mechanism is disposed between the first telescopic leg and the bracket, and the positioning mechanism is configured to fix the bracket and the first telescopic leg or release the bracket and the first telescopic leg. The ladder of claim 1, wherein the positioning mechanism comprises: at least one positioning hole is disposed on the bracket; a plurality of perforations are disposed on the first telescopic leg; and a plug; the first A plurality of perforations of the telescopic legs are selected to be aligned with the positioning holes of the bracket, and the insertion holes are inserted into the positioning holes and the opposite perforations to fix the bracket and the first telescopic legs. The ladder according to claim 1 or 2, wherein a second telescopic leg is disposed at a bottom end of each of the first telescopic legs, and a fine adjustment mechanism is disposed between the second telescopic leg and the first telescopic leg. The second telescopic foot is adjusted to extend the length of the first telescopic leg. According to the ladder of claim 3, wherein the fine adjustment mechanism package The utility model comprises: a fixing seat disposed at a bottom end of the first telescopic foot, the fixing seat has an inner screw hole; and the external telescoping leg is externally threaded, the external thread is screwed to the inner screw of the fixing seat hole. The ladder of claim 4, wherein the bottom end of the second telescopic foot is provided with a foot pad. The ladder according to claim 4, wherein the fixing seat is fixed inside the bottom end of the first telescopic foot. According to the ladder of claim 4, wherein the two ladder frames are provided with a connecting rod and a set of fasteners, and the two ladder frames are connected by a connecting rod and are assembled by a connecting rod. The group is fastened.