KR20110066086A - Foldable ladder - Google Patents

Abstract

PURPOSE: A folding type ladder is provided to use for inspection and repair of facilities like a bridge or a building and to use effectively for evacuation in an emergency like a fire in a multistoried building. CONSTITUTION: A folding type ladder comprises: an intermediate profile member(110) provided with a flange type first joint; a step member(120) coupled to the first joint of the intermediate profile member by a hinge pin, and forming an adjacent side to right and left sides of the intermediate profile member in a flat plane and a taper on the folded side to make the right and left sides of the intermediate profile member folded horizontally or unfolded perpendicularly; left and right profile members(130) connecting the step members vertically to fold or unfold the step members simultaneously; and a step folding device coupled to the top of the intermediate profile member and pulling or releasing the right and left profile members to fold or unfold the step member.

Description

Folding ladders

The present invention relates to a ladder, and more particularly, to a folding ladder having a structure that can be folded and used for evacuation or emergency in case of fire in a multi-storey building or fixedly installed in the facility for inspection and repair of a facility such as a bridge. will be.

Ladder, a tool that allows you to climb up and down to a certain height, is widely used for construction, civil engineering, and landscaping as well as emergency in everyday life.

As is well known, the most common form of the ladder is a one-shaped structure or a structure that can be folded and made up of the 'A' shape, but it is disclosed in Patent Publication No. 1999-017256 (name: telescopic ladder As described in the above), a ladder having a straight or folding structure that can be adjusted in length by being straight is known. Stretch or folding ladder is very useful in that it can be moved up and down to the desired position by adjusting the length of the up and down.

Meanwhile, in order to inspect and repair facilities such as bridges or buildings, inspection ladders are installed outside the railings of the facilities to allow workers to freely enter and exit the facility. Such a check ladder can be arbitrarily used by an intruder with an impure intention because anyone can access the facility arbitrarily and a separate locking device is not provided.

In addition to the ladder used for checking and repairing the above facilities, it is difficult to use the ladder for evacuation in an emergency situation such as when a fire occurs in a multi-storey building such as an apartment or a villa.

The present invention was developed to improve the conventional problems as described above, the object of which can be installed and used in the facility for inspection and repair of facilities, such as bridges and buildings, can be used in emergency, such as a fire occurrence in a multi-storey building, etc. It is to provide a folding ladder that can be used efficiently even when used for evacuation in situations.

The folding ladder of the present invention for achieving the above object is composed of an intermediate profile member which is made up of a vertical shape long and arranged in the center of the ladder, and a scaffold member which is installed at regular intervals up and down on the left and right sides of the intermediate profile member. And left and right profile members connecting the scaffold members at the left and right sides of the intermediate profile member, and scaffold folding means for pulling or releasing the left and right profile members to simultaneously fold or unfold the scaffold members.

In particular, the intermediate profile member has a first coupling portion for hinge coupling at regular intervals up and down on the left and right sides, and the scaffold member has one end portion hinged to the first coupling portion to allow left and right sides of the intermediate profile member. It can be fixed by folding it in parallel or straightening it.

In addition, the left and right profile members are made up and down length corresponding to the intermediate profile member to connect the other end portion of the scaffold member up and down at the left and right sides of the intermediate profile member so that the scaffold members can be folded or unfolded at the same time.

In addition, the scaffold folding means is provided on the intermediate profile member so as to connect the intermediate profile member and the left and right profile members, so that the scaffold member is folded or unfolded by pulling or releasing the left and right profile members.

Folding ladder according to the present invention configured as described above,

1 is a front perspective view of a first embodiment of the present invention.
2 is a rear perspective view of a second embodiment of the present invention.
3 is a view showing a state in which the scaffold member is folded in the state of FIG. 2.
4 is a view showing a state in which the scaffold member is completely folded from the state of FIG.
5 is an exploded perspective view showing a second embodiment of the present invention in which a second ladder is added to the first embodiment of the present invention.
6 is a view illustrating an example in which a plurality of second ladder parts are coupled to the first ladder part of the present invention.
FIG. 7 is a view illustrating a structure in which the second left and right profile members of the second ladder part are folded or unfolded together with the left and right profile members of the first ladder part.
8 is a view showing a modification to the second embodiment of the present invention.
Figure 9 is a view showing a third embodiment of the present invention, Figure 9a is a front view of the ladder is opened, Figure 9b is a side view of Figure 9a, Figure 9c is a front view of the ladder folded state.
10 is a cross-sectional view of the intermediate profile member applied in the third embodiment of the present invention.
11 is a cross-sectional view of the left and right profile members applied to the third embodiment of the present invention.
12 is a view showing the footrest folding means applied to the third embodiment of the present invention, FIG. 12A is a front view in the open state of the link member, FIG. 12B is a side sectional view in the folded state of the link member, and FIG. It is a front view which shows the state which the link member was folded.
FIG. 13 is an enlarged view of a portion A of FIG. 9A.
Figure 14 is a view showing a fourth embodiment of the present invention, Figure 14a is a front view of the ladder is opened, Figure 14b is a side view of Figure 14a, Figure 14c is a front view of the ladder folded state.
FIG. 15 is a view showing the scaffold folding means applied to the fourth embodiment of the present invention, FIG. 15A is a front view showing the configuration provided on the upper side of the intermediate profile member, FIG. 15B is a plan view of FIG. 15A, and FIG. 15C is the middle It is a front view which shows the structure provided under the profile member, and FIG. 15D is a side view of FIG. 15C.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments are provided to those skilled in the art to fully understand the present invention can be modified in various forms, the scope of the present invention to the embodiments described below It is not limited.

First Embodiment

1 and 2 are respectively a perspective view of the front portion and the rear portion of the first embodiment of the present invention, Figure 3 is a view showing a state in which the scaffold member is folded in the state of Figure 2, Figure 4 is a view of FIG. It is a figure which shows the state that the scaffold member was completely folded from the state.

In the drawings, the height of the ladder is shown to be very low for convenience of drawing, but the height may be designed in various ways depending on the purpose of use and purpose.

1 to 4, the folding ladder according to the present embodiment includes an intermediate profile member 10 serving as a support shaft at the center of the ladder, and left and right sides of the intermediate profile member 10. The scaffold members 20 provided at regular intervals along the up and down directions, the left and right profile members 30 connecting the scaffold members 20 up and down, and the left and right profile members 30 by pulling or releasing the scaffold members ( 20) is composed of a scaffold folding means 40 to be folded or unfolded. The detailed description of each component is as follows.

First, the intermediate profile member 10 is preferably made of a material having a high strength and light weight, such as high-strength aluminum, and more preferably a hollow structure to reduce the weight. The shape of the intermediate profile member 10 is illustrated in this embodiment in the cross-sectional square, but may be variously modified in other forms.

The left and right sides of the intermediate profile member 10 are formed as flat surfaces, respectively, and are provided with first coupling parts 11 for hinge coupling at regular intervals along the vertical direction of the ladder. In the present embodiment, the first coupling part 11 has a protrusion end 11b protruding toward one end 21 of the scaffold member 20 and an opening 11a opened to both sides of the first protrusion end 11b. Is illustrated.

Like the central shaft member 10, the scaffold member 20 is made of a material such as high-strength aluminum, and the inside of the scaffold member 20 may be formed of a hollow or filled structure, and an intermediate profile member on the left and right sides of the intermediate profile member 10. A plurality is provided along the vertical direction of (10). That is, the scaffold member 20 is rotatably coupled to one side end portion 21 to the first coupling portion 11 in a state arranged at regular intervals in the same manner as the arrangement interval of the first coupling portion (11).

In particular, one end 21 of the scaffold member 20 is superimposed on the protruding end 11b of the intermediate profile member 10, that is, one end 21 of the scaffold member 20 is formed of the protruding end 11b. It is rotatably coupled by a hinge pin (21a) in a form overlapping on both sides. The upper portion of one end portion 21 of the scaffold member 20 is formed in a flat and angled shape, so that the intermediate profile member 10 when the scaffold member 20 is extended horizontally from the intermediate profile member 10. It is fixed by being caught by the upper end of the opening portion 11a of the ladder, so that when the ladder user stepping on the footrest member 20, the footrest member 20 can withstand the load applied by the user to maintain a horizontal state. On the other hand, the bottom portion of the one end portion 21 of the footrest member 20 is rounded, so that when the footrest member 20 is rotated and stretched or folded in a horizontal state, the one end portion 21 is opened without any problem. It is possible to enter and exit 11a). In this way, the scaffold member 20 is folded or extended to the left and right sides of the intermediate profile member 10. Similarly, the other end 22 of the scaffold member 20 opposite to the one end 21 is left and right. Is coupled with the profile member 30. The contour of the scaffold member 20 in this embodiment is illustrated in an approximately cuboid shape to facilitate supporting the foot of the ladder user.

The left and right profile members 30 may be made of the same material as the intermediate profile member 10 and the scaffold member 20, and may have a hollow or filled structure inside. When the scaffold member 20 is folded, FIG. 4 is illustrated. As described above, it may be formed of an arc-shaped cross-sectional structure that is folded next to the intermediate profile member 10 while concealing the scaffold member 20. The left and right profile members 30 are coupled to the other end portions 22 of the scaffold member 20 to connect the other end portions 22 of the scaffold member 20. The left and right profile members 30 and the scaffold member 20 The coupling structure may be the same as the coupling structure of the intermediate profile member 10 and the scaffold member 20, or may simply be a hinge coupling structure.

The scaffold folding means 40 is composed of a screw shaft 41, a female screw member 42, a handle 43, and a link member 44. The screw shaft 41 is installed up and down in the rear portion of the intermediate profile member 10, the length of which consists of a length corresponding to the length that the scaffold member 20 is folded and extended. The screw shaft 41 is supported by bearing members 45 and 46 which rotatably support the screw shaft 41 to the back of the intermediate profile member 10 so that it can rotate in place. That is, the upper end and the lower end of the screw shaft 41 have a threadless structure, and the upper end and the lower end are rotatably coupled to the bearing members 45 and 46. The female screw member 42 is fastened on a screw thread of the screw shaft 41, and the handle 43 is installed at one end of the screw shaft 41 so that the ladder user rotates the handle 43 and the screw. The shaft 41 is rotated. In this embodiment, the handle 43 is provided at the upper end of the screw shaft 41 to protrude toward the upper end of the intermediate profile member 10. The link member 44 connects the female screw member 42 and the left and right profile members 30 to each other so that the female screw member 42 moves the screw shaft 41 according to the rotation direction when the handle 43 is rotated. If the upward movement or downward movement, the left and right profile members 30 are pulled or pushed by the link members 44 so that the scaffold member 20 is folded or unfolded. To facilitate this operation, one end of the link member 44 coupled to the female screw member 42 may be coupled to the outer circumferential surface of the female screw member 42 through a bearing (not shown), and the left and right sides may be coupled to each other. The other end of the link member 44 coupled to the profile member 30 may be coupled to the left and right profile members 30 by a ball joint or a flexible joint (not shown).

On the other hand, in the present embodiment, the front end of the intermediate profile member 10, the fastener (R) of the seat belt is coupled to prevent the ladder user from inadvertently falling up and down the ladder is coupled to this hinge A rail groove 12 through which the R can slide is formed long in the vertical direction of the intermediate profile member 10. That is, as shown in Figure 1, the ring-shaped hinge (R) having a stop key (R1) is provided in the seat belt, the ladder user in the state where the detent (R1) is inserted into the rail groove 12 When the body is abnormally twisted on the ladder, the detent (R1) is inserted into the rail groove 12 while the angle of the detent is stopped by sliding the hinge (R) to prevent the fall of the ladder user.

In this embodiment, the front upper end of the intermediate profile member 10 is further provided with a rope connecting ring 13 that can connect a life rope (not shown), such as a stiffener.

In order to prevent anyone from arbitrarily using the ladder of the present invention, the female screw member 42 and the fixing member 45 above the intermediate profile member 10 are provided with a female screw member 42 and the fixing member 45 in a chain or the like. Lock rings 42a and 45a may be provided to allow the lock to be engaged in a state where they are bound to each other. In particular, the handle 43 is moved from the upper end of the intermediate profile member 10 so that the locking rings 42a, 45a can be exposed to the outside when the left and right profile members 30 are folded toward the intermediate profile member 10 side. In addition, it is preferable that the left and right profile members 30 are properly folded toward the intermediate profile member 10 so that the locking ring 42a of the female screw member 42 is not concealed by the left and right profile members 30.

Second Embodiment

5 is an exploded perspective view showing a second embodiment of the present invention in which a second ladder part is added to the first embodiment of the present invention.

In the present embodiment, when the height of the ladder (hereinafter referred to as 'first ladder part') described in the first embodiment is made short, the second ladder part is assembled at the bottom of the first ladder part to increase its length. Characterized in that added to.

The second ladder part comprises a second intermediate profile member 50, a second scaffold member 60, and a second left and right profile member 70, and their materials and shapes are each an intermediate profile of the first ladder part. It is made in the same manner as the member 10, the scaffold member 20 and the left and right profile member 30.

The second intermediate profile member 50 is linearly coupled to the lower end of the intermediate profile member 10, and the second left and right profile member 70 is linearly coupled to the lower end of the left and right profile members 30. That is, coupling ends 53 and 71 are provided at upper ends of the second intermediate profile member 50 and the second left and right profile members 70, respectively, and lower ends of the intermediate profile member 10 and the left and right profile members 30, respectively. Inserting grooves are formed in the coupling ends 53 and 71 and the lower ends of the intermediate profile member 10 and the left and right profile members 30 and the coupling ends 53 and 71 are respectively provided with key holes 14 and 30a, 53a, 71a are formed, and the intermediate profile member 10 and the second intermediate profile member 50 are separated from each other by the fixing keys 81, 82 fastened to the key holes 14, 30a, 53a, 71a. And the left and right profile members 30 and the second left and right profile members 70 are coupled to each other.

The coupling structure of the second scaffold members 60 to the second intermediate profile member 50 is the same as that of the coupling members of the scaffold members 20 to the intermediate profile member 10 described in the first embodiment. The coupling structure of the second scaffold member 60 by the second left and right profile members 70 is also the same as the coupling structure of the scaffold member 20 by the left and right profile members 30. For example, in the case of the second intermediate profile member 50 and the second scaffold member 60, the second coupling portion 51 at regular intervals along the vertical direction on the left and right sides of the second intermediate profile member 50. The second coupling part 51 is composed of a second opening part 51a and a second protrusion part 51b, so that one end portion 61 of the second scaffold member 60 is the second protrusion part 51b. 2) the second scaffold member 60 is folded or extended to the left and right sides of the second intermediate profile member 50 while being hinged to the second opening and exiting to the second opening 51a.

Since the second left and right profile members 70 are coupled to the left and right profile members 30 while connecting the second scaffold members 60 up and down, when the scaffold folding means 40 of the first ladder part is operated, 2 The scaffold member 60 to be folded or unfolded at the same time in conjunction with the scaffold member 20. The second left and right profile members 70 also have an arcuate cross-sectional structure to be folded while concealing the second scaffold member 60 when the second scaffold member 60 is folded.

Like the intermediate profile member 10, the front portion of the second intermediate profile member 50 is provided with a second rail groove 52 that forms an extension line of the rail groove 12. Can be moved sliding.

FIG. 6 is a view illustrating an example in which a plurality of second ladder parts are coupled to the first ladder part up and down, and FIG. 7 illustrates a second left and right profile member of the second ladder part of FIG. A diagram showing a structure folded or unfolded together.

When the ladder of FIG. 6 is installed in a high-rise building, the ladder can be appropriately used in an emergency such as a fire occurrence. That is, when the female screw member 42 and the bearing member 45 of the first ladder part located on the highest floor of the building are locked by a chain, etc., and the evacuation personnel of the lower floor cannot release the lock. In the insertion groove of the left and right profile members 30 into which the engaging ends 71 of the second left and right profile members 70 are inserted, so as to be able to use the second ladder without extending the locking mechanism of the first ladder. (31) has a structure that is open to the side, and the plurality of second ladder parts are also laterally inserted into the lower end of the upper side of the second left and right profile member 70 coupled with the second second left and right profile member 70 between each other. The groove 72 is formed. Therefore, when the fixing key 82 which is fastened to the key holes 30a and 71a to connect the first ladder part and the second ladder part on the uppermost side is removed, the second left and right profile members 70 of the second ladder part are left and right. Unfolded freely from the profile member 30, the second left and right profile members 70 of the plurality of second ladder parts are unfolded one after another to enable the use of a ladder.

In addition, the shock absorber 90 may be further provided on the second ladder part on the lowermost side to alleviate the impact of the plurality of second ladder parts suddenly being unfolded at high speed. That is, the shock absorber 90 having the conventional structure is provided in the second intermediate profile member 50 'of the lowermost second ladder part, and the shock absorber 90 is the second left and right profile member of the lowermost second ladder part ( 70 is connected to the second link member 44 '. This second link member 44 'is configured in the same manner as the link member 44 described above.

The rear part of the second intermediate profile member 50 of the second ladder part may be provided with a bracket (not shown) for fixing to a wall or the like, and may be fixed with a screw or the like.

8 is a view showing a modified example of the second embodiment of the present invention, characterized in that the second ladder portion is coupled to the upper end of the first ladder portion, the structure of the configuration is the same as the second embodiment described above Therefore, detailed description thereof will be omitted.

The folding ladder of the present invention configured as described above may be installed and used in facilities such as a bridge or a building for inspection and repair of facilities such as a bridge or a building. That is, the intermediate profile member 10 is fixed to the entrance side of the facility by using a bracket or the like by welding or fastening means, the handle 43 of the stool folding means 40 can be easily accessed and operated by the ladder user Position it facing the position. As shown in FIG. 5, the second ladder part may be installed to be coupled to the lower end of the first ladder part. Alternatively, the second ladder part may be installed to be coupled to the opposite position as shown in FIG. 8. Only one ladder part can be installed and used alone.

When the ladder is not used, the handle 43 of the stool folding means 40 is rotated so that the stool member 20 is folded toward the intermediate profile member 10 (when the second ladder part is provided, the second The scaffold member 60 is also folded to the second intermediate profile member 50 side). In this state, the left and right profile members 30 conceal the scaffold member 20 (when the second ladder part is provided, the second left and right profile members 70 also conceal the second scaffold member 60), It is possible to prevent an intruder or the like having an impure intention from using a ladder arbitrarily. In order to more reliably prevent the use of a ladder by an intruder or the like, the locking loops 42a and 45a provided in the female screw member 42 and the bearing member 45 of the scaffold folding means 40 are respectively bound by a chain or the like. Just lock it.

On the other hand, when using the ladder of the present invention to check and repair facilities such as bridges or buildings equipped with a folding ladder of the present invention or to evacuate in case of an emergency such as a fire in the facility, the lock is released and the footrest folding means 40 The steering wheel 43 may be rotated to extend the scaffold members 20 and 50 from the central shaft members 10 and 50.

As described above, the folding ladder of the present invention can easily fold and unfold the scaffold members 20 and 50 through the operation of the handle 43 of the scaffold folding means 40, so that the ladder can be easily managed and stored.

In addition, the folding ladder of the present invention is installed on the outer wall of the building in a structure in which several second ladders are connected up and down on the lower side of the first ladder, so that people in the building can be evacuated safely in an emergency situation such as a fire in the building. You can do it.

Third Embodiment

Figure 9 is a view showing a third embodiment of the present invention, Figure 9a is a front view of the ladder is opened, Figure 9b is a side view of Figure 9a, Figure 9c is a front view of the ladder folded state. 10 and 11 are cross-sectional views of the intermediate profile member and the left and right profile members respectively applied to the third embodiment of the present invention. 12 is a view showing the scaffold folding means applied in the third embodiment of the present invention, FIG. 12A is a front view in a state where the link member is opened, and FIG. 12B is a side sectional view in a state where the link member is folded, FIG. 12C is a front view showing a state in which the link member of FIG. 12A is folded. FIG. 13 is an enlarged view of a portion A of FIG. 9A.

As shown in FIG. 9, the third embodiment of the present invention uses the intermediate profile member 110, the scaffold member 120, the left and right profile members 130, and the scaffold folding means 140 as in the above-described embodiments. Equipped. The specific configuration of each of these elements is as follows, and parts not mentioned in the following description are based on the configuration applied to the above-described first or second embodiment.

First, as illustrated in FIG. 10, the intermediate profile member 110 is provided with a flange-like first coupling portion 111 while the left and right surfaces are formed as flat surfaces. Then, one end portion 121 of the scaffold member 120 is coupled to the first coupling portion 111 of the flange form by a hinge pin.

As shown in FIG. 13, the one end portion 121 of the scaffold member 120 is formed with a taper 121a at the folding side while the left and right sides of the intermediate profile member 110 are in contact with the flat surface. The left and right sides of the 110 can be folded horizontally or at right angles.

The left and right profile members 130 have an open shape such that the other end portion 122 of the scaffold member 120 is hinged, as shown in FIG. 11, and the other end portions 122 of the scaffold member 120 are arranged up and down. By connecting to the scaffold member 120 to be folded or unfolded at the same time.

The scaffold folding means 140 is coupled to the upper end of the intermediate profile member 110, as shown in Figure 9, the detailed configuration is shown in Figures 12a to 12c. That is, the scaffold folding means 140 of the present embodiment includes a casing 141, a rotation shaft 142, a bevel gear pair 143, a handle 144, a nut 145, a link member 146, and a stopper 147. And, and includes a wire 148, specifically described as follows.

First, the casing 141 is coupled to the upper end of the intermediate profile member 110, the rotation shaft 142 and the bevel gear pair 143, the nut 145, the stopper 147 is accommodated therein.

The rotating shaft 142 is installed to be rotatable by being supported by a bearing in a state in which the casing 141 is vertically disposed up and down, and a male screw portion 142a is formed on an outer circumferential surface thereof.

In addition, the bevel gear pair 143 is installed on an upper outer circumference of the rotating shaft 142, and one gear of the bevel gear pair 143 is coupled to the rotating shaft 142 to rotate together with the rotating shaft 142. Then, the other gear is connected to the handle 144 horizontally installed on the casing 141 by the connecting shaft 144a to be rotated by the rotation operation of the handle 144. Accordingly, when the handle 144 is rotated, the rotating shaft 142 rotates via the bevel gear pair 143.

The nut 145 is fastened to the rotating shaft 142 to be able to move up and down along the rotating shaft 142. In particular, when the rotating shaft 142 is rotated by operating the handle 144, the foot member 120 is folded. It moves upward along the axis of rotation 142. One side of the outer peripheral surface of the nut 145 is provided with a latch 145a protruding toward the stopper 147.

The link member 146 connects the nut 145 with the left and right profile members 130, thereby pulling or releasing the left and right profile members 130 as the nut 145 moves upward or downward on the rotation shaft 142. do. Accordingly, the scaffold member 120 connected to the left and right profile members 130 is folded or unfolded.

The stopper 147 is rotatably installed in the casing 141 by the shaft pin 147a. In particular, the stopper 147 is installed near the highest height of the nut 145 when the foot member 120 is fully folded. . In addition, the stopper 147 is provided with a protruding jaw 147b below the shaft pin 147a so as to partially support the bottom portion of the latch 145a at a position facing the nut 145. Then, the compression spring 147c is coupled to the position opposite to the side facing the nut 145 in the stopper 147, one end of the compression spring 147c is fixed to the inner wall of the casing 141 and the other end Is fixed to the stopper 147 below the shaft pin (147a). Therefore, the stopper 147 is normally forced in the direction in which the latch 145a is caught by the projecting jaw 147b of the stopper 147 by the elastic force of the compression spring 147c.

One end of the wire 148 is fixed to the side of the latch 145a of the nut 145, and the other end is free and extends downward to be held by an external ladder user. Immediately below the stopper 147, a support 149 through which the wire 148 extends is provided in a state fixed to the casing 141.

Therefore, when the scaffold member 120 is folded to the intermediate profile member 110 side, the latch 145a of the nut 145 is caught in the stopper 147 as shown in FIG. When 148 is pulled hard, the protruding jaw 147b of the stopper 147 is pushed by the load applied to the latch 145a so that the stopper 147 rotates. Then, the free nut 145 is moved below the rotation shaft 142 by its own weight, as indicated by the virtual line in Figure 12b, so that the scaffold member 120 is extended from the intermediate profile member 110 to use a ladder. It becomes possible.

On the other hand, as mentioned above, when the handle 144 is rotated, the rotating shaft 142 connected to the handle 144 by the bevel gear pair 143 rotates together with the nut fastened to the rotating shaft 142. 145 is moved upward along the axis of rotation 142, so that the left and right profile member 130, which is connected to the nut 145 by the link member 146, is folded toward the intermediate profile member 110, thereby The scaffold member 120 connected to each other by the member 130 is also folded.

On the other hand, the ladder of the present embodiment is configured to be folded in half for easy movement. That is, as shown in FIG. 13, the intermediate profile member 110 and the left and right profile members 130 are provided with conventional hinge parts 110a and 130a so as to be folded up and down in the middle portion, respectively.

Moreover, the ladder of this embodiment is provided with the fixing bracket 130b in the back part of the intermediate profile member 110 so that it can be used fixedly installed in the wall surface of a building. This fixing bracket 110b is fixed to the ladder installation site with a bolt.

Fourth Embodiment

Figure 14 is a view showing a fourth embodiment of the present invention, Figure 14a is a front view of the ladder is opened, Figure 14b is a side view of Figure 14a, Figure 14c is a front view of the ladder folded state. 15 is a view showing the scaffold folding means applied to the fourth embodiment of the present invention, FIG. 15A is a front view showing the configuration provided on the upper side of the intermediate profile member, FIG. 15B is a plan view of FIG. 15A, and FIG. 15C Is a front view which shows the structure provided below the intermediate profile member, and FIG. 15D is a side view of FIG. 15C.

As shown in FIGS. 14A to 14C, the fourth embodiment of the present invention, like the above-described embodiments, includes the intermediate profile member 210, the scaffold member 220, the left and right profile members 230, and the scaffold folding means ( 240 is provided, in particular, there is a feature in the configuration of the scaffold folding means 240, the remaining configuration is the same as the third embodiment described above. Therefore, hereinafter, the description will focus on the scaffold folding means 240 which is a characteristic configuration of the fourth embodiment.

The scaffold folding means 240 of the present embodiment includes a first housing 241 and a second housing 242, a first roller 243 and a second roller 244, a wire 245, a wire moving block 246, A moving piece 247, a link member 248, and a rocker 249 are included, and will be described in detail below.

First, the first housing 241 is installed vertically long in the upper end of the intermediate profile member 210, the first roller 243 is installed on the inner upper side of the first housing 241. The second housing 242 is installed at the lower end of the intermediate profile member 210, and the second roller 244 is installed therein.

The wire 245 is wound around the first roller 243 and the second roller 244, thereby extending from the upper end to the lower end of the intermediate profile member 210. The wire 245 may move on the first roller 243 and the second roller 244.

The wire movement block 246 is made of a weight to be fixed to the wire 245 in the lower side of the intermediate profile member 210 to be able to move with the wire 245. In particular, referring to FIG. 15C, when the wire movement block 246 descends to the bottom end of the intermediate profile member 210 by its own weight (part shown by a imaginary line), the scaffold member 220 is in an unfolded state, and the ladder user When the wire moving block 246 is positioned at the portion shown by the solid line in the drawing by pulling the wire 245, the scaffold member 220 is in a folded state. The wire movement block 246 is formed with a locking projection 246a for locking by the rocker 249.

The moving piece 247 is installed on the side of the first housing 241 in a state of being connected to the wire 245, and moves up and down in the first housing 241 according to the operation of pulling the wire 245.

One end of the link member 248 is connected to the movable piece 247, and the other end of the link member 248 is connected to the left and right profile members 230. Therefore, when the ladder user pulls the wire 245 in the state in which the scaffold member 220 is unfolded, the movable piece 247 moves upward, and at this time, the left and right profile members 230 connected to the movable piece 247 by the link member 248. By pulling the footrest member 220 is also folded.

The rocker 249 is installed at the lower portion of the intermediate profile member 210 as shown in FIGS. 15C and 15D, where the ladder user pulls the wire 246 to move the wire moving block 246 to the solid line of FIG. 15C. When the rocker 249 is engaged with the locking projection 246a of the wire moving block 246 in the raised position, the wire 246 is no longer moved.

Therefore, the state in which the wire 246 is pulled by the ladder user is in the state in which the scaffold member 220 is folded toward the middle profile member 210 together with the left and right profile members 230, and thus the locking projection of the wire moving block 246 is thus. When the rocker 249 is fastened to 246a, the scaffold member 220 is maintained in a folded state. On the contrary, in the case where the scaffold member 220 is to be unfolded from the intermediate profile member 210, the rocker 249 is released from the locking projection 246a of the wire movement block 246. The scaffold member 220 is extended by falling by its own weight.

In the above, the present invention has been described based on the preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. There are several variations available.

10,110,210: intermediate profile member 11,111: first coupling portion
12: rail groove 13: rope connecting ring
14,30a, 53a, 71a: key hole 20,120,220: scaffold member
30,130,230: left and right profile members 31,72: insertion groove
40,140,240: Footrest folding means 41: Screw shaft
42: female thread member 42a, 45a: locking ring
43: handle 44: link member
45,46: bearing member 50,50 ': second intermediate profile member
53,71: coupling end 60: second scaffold member
70: second left and right profile member 81,82: fixed key
90: shock absorber 110a, 130a: hinge part
110b: fixing bracket 141: casing
142: rotating shaft 143: bevel gear pair
144: handle 145: nut
145a: latch 146: link member
147: stopper 148: wire
241: first housing 242: second housing
243: first roller 244: second roller
245 wire 246 wire moving block
247: moving piece 248: link member
249: rocker

Claims (15)

An intermediate profile member having a long vertical shape and having first coupling parts for hinge coupling at predetermined intervals on the left and right sides;
A plurality of scaffold members which are hinged at one end of the first coupling portion of the intermediate profile member, and are folded or folded at right angles to the left and right sides of the intermediate profile member to be fixed;
Left and right profile members having an upper and lower length corresponding to the intermediate profile member, the left and right profile members connecting the other end portions of the scaffold member upward and downward to allow the scaffold members to be folded or unfolded at the same time; And
And a scaffold folding means installed on the intermediate profile member to connect the intermediate profile member and the left and right profile members to pull or release the left and right profile members so that the scaffold member is folded or unfolded.
The method of claim 1, wherein the scaffold folding means,
A screw shaft which is rotatably installed by a bearing member vertically in a rear portion of the intermediate profile member;
A female screw member fastened to the screw shaft;
A handle installed at the distal end of the screw shaft to rotate the screw shaft; And
And a link member that connects the female screw member with the left and right profile members so that the foot member is folded or unfolded by pulling or releasing the left and right profile members by moving the female screw member along the screw axis when the handle is rotated. Folding ladder.
The method of claim 2,
Folding bearing, characterized in that the bearing member and the female screw member is provided with a locking ring for engaging each other with a lock.
The method of claim 1,
The left and right profile member is a folding ladder, characterized in that made of an arc-shaped cross-sectional structure that is folded while concealing the scaffold member when the scaffold member is folded.
The method of claim 1,
The first coupling portion of the intermediate profile member is composed of a protruding end protruding toward one end of the scaffold member and an opening opening to both sides of the protruding end,
One end portion of the scaffold member is hinged by overlapping with the protruding end is folded folding, characterized in that the one end of the scaffold member to enter and exit the opening when the scaffold member is folded or extended.
The method of claim 1,
The front part of the intermediate profile member is coupled to the hinge of the seat belt for preventing the fall of the ladder user is coupled to the hinge so that the sliding movement, the angle of the hinge when the ladder user falls, the hinge slides The folding ladder characterized in that the rail groove which becomes impossible is formed long in the up-down direction.
The method of claim 1,
Folding ladder, characterized in that the front upper portion of the intermediate profile member is provided with a rope connecting ring for connecting a life rope.
The method according to any one of claims 1 and 4, 5 and 6,
And a second ladder configured to be formed in the same manner as the intermediate profile member, the left and right profile members, and the scaffold member to extend the length of the ladder, and the second ladder part including the second left and right profile members and the second scaffold member. Folding ladder.
The method of claim 8,
The intermediate profile member and the second intermediate profile member, and the left and right profile member and the second left and right profile member, each have a coupling end and an insertion groove structure in which a key hole is formed, and are fixed to the key hole by a fixed key. Folding ladder, characterized in that coupled to each other.
The method of claim 8,
A shock absorber is provided on the second intermediate profile member of the second ladder to allow the second left and right profile members to be gradually extended, and the shock absorber is connected to the second left and right profile members as a second link member. Folding ladder.
The method of claim 1, wherein the scaffold folding means,
A casing coupled to the intermediate profile member;
A rotating shaft disposed vertically in the casing to be rotatably installed and having a male screw portion formed on an outer circumferential surface thereof;
Bevel gear pair provided in the upper outer peripheral portion of the rotating shaft in the casing;
A handle which is connected to the bevel gear pair by a connecting shaft outside the casing to rotate the rotating shaft;
A nut which is fastened to the rotating shaft to move up and down, and moves upward along the rotating shaft so that the scaffold member is folded when the rotating shaft is rotated by the handle;
A link member that connects the nut and the left and right profile members so that the scaffold member is folded or unfolded by pulling or releasing the left and right profile members according to the movement of the nut;
A stopper rotatably installed to catch or release the nut of the nut in the casing, and to receive a force in a direction in which the catch is normally held by a compression spring;
One end is fixed to the latch side of the nut, the other end is extended in a long downward direction in the free state to be grasped by the ladder user outside, the latch of the nut is pulled by the ladder user in a state that is caught on the stopper And folding the stopper in a direction in which the latch is released from the stopper so that the nut is moved downward of the rotation shaft by its own weight to expand the scaffold member.
The method of claim 1,
The intermediate profile member and the left and right profile member, each of the folding ladder, characterized in that the hinge portion is provided so that it can be folded in half.
The method of claim 1,
The first coupling portion of the intermediate profile member is composed of a flange, one side end portion of the scaffold member is a folding ladder, characterized in that the tapered on the folding side while the surface in contact with the left and right sides of the intermediate profile member made of a flat surface .
The method of claim 1,
The rear part of the intermediate profile member is a folding ladder, characterized in that the fixing bracket for fixing to the installation site of the ladder.
The method of claim 1, wherein the scaffold folding means,
A first housing installed vertically at an upper end of the intermediate profile member;
A first roller installed above the inner side of the first housing;
A second housing installed at a lower end of the intermediate profile member;
A second roller installed in the second housing;
A wire wound around the first roller and the second roller to move from the upper end to the lower end of the intermediate profile member to be movable;
A wire moving block fixed to the wire at a lower side of the intermediate profile member to move together with the wire;
A moving piece installed in the first housing while connected to the wire and moving up and down in the first housing according to an operation of pulling the wire;
A link member which connects the movable piece and the left and right profile members so that the scaffold member is folded or unfolded by pulling or releasing the left and right profile members in accordance with the movement of the movable piece;
And a rocker installed on the lower side of the intermediate profile member to lock or release the wire moving block by hand operation to control the movement of the wire.

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