KR102312867B1 - Cross insider Ladder - Google Patents

Abstract

The present invention relates to a front leg member, a rear leg member, a first link frame having a front end axially coupled to the front leg member, an operating frame connected to and installed at the end of the first link frame, a guide long hole formed in the operating frame, and the A guide pin installed on the vertical frame of the rear leg member and moving on the guide long hole, a second link frame having a tip axially coupled to the rear leg member, an operation frame connected to the end of the second link frame, and the first A guide long hole formed in the operation frame of the two link frame, a guide pin installed on the vertical frame of the front leg member and moving on the guide long hole, and a hinge shaft coupled to the center butt portion of the first and second link frames, First and second locking holes and folding holes are respectively formed through the operation frame of the first link frame, and the hooking pins of the rear rocker member are selectively fitted into the first and second locking holes and the folding holes, respectively, and the rear leg To constrain the unfolding and folding of the member, first and second locking holes and folding holes are formed in the operation frame of the second link frame, and the first and second locking holes and folding holes have hook pins of the front rocker member. It provides a cross-type insider ladder device, characterized in that each selectively fitted to constrain the unfolding and folding of the front leg member.

Description

Cross insider ladder device {Cross insider Ladder}

The present invention relates to a cross-type insider ladder device, and more specifically, by installing a "X"-shaped link member between the front and rear leg members, the operation of expanding the front and rear leg members outward or folding inward is stable It relates to a cross-type insider ladder device that can support the work platform without shaking or flow during the work process.

In general, when work in high places is required, for example, in various work sites where work such as woodworking, painting, plastering, electricity, painting, film, tile, etc. making it work.

On the other hand, as a representative prior art related to such a step-type work scaffold, the Korean Patent Office Laid-Open Utility Model Publication No. 20-2014-0002358 (name: step step scaffolding device for work) can be given as an example.

In the prior art, in the stepped scaffolding device that an operator can climb up and down, a stationary frame disposed on both sides at a distance, and a scaffold fixed to the stationary frame in a structure arranged with a step between the both sides of the fixing frame, and the fixing A first guide pipe having a hollow structure formed on one side of the frame, a scaffolding means comprising a fastening fastener fastened to the first guide pipe, and the unit structure and The gist is that it is configured to include a pressure coupling means that is separably fixed, and a handle means that is coupled to the pressure coupling means so as to move up and down.

However, as the step scaffolding device having the same structure as in the prior art is used in a fixed state rather than a folded or stacked structure, the volume cannot be reduced when storing the scaffold device after work, so space necessary for storage is secured. has the disadvantage of being limited.

Document 1: Korean Intellectual Property Office Publication No. 20-2014-0002358

In order to solve the problems of the prior art, the present invention is a cross type that enables stable folding and unfolding of the front and rear leg members by installing "X"-shaped link members between the front and rear leg members constituting the step-type footrest. We would like to provide an insider ladder device.

In addition, the present invention provides a cross-type insider ladder device that can adjust the height of the working scaffold according to the working position by enabling the front and rear leg members to operate in two stages.

In addition, the present invention provides a cross-type insider ladder device to be able to stably support the working scaffold without shaking in the working process.

The present invention for achieving the above objects, in the cross-type insider ladder device, a front leg member consisting of a working scaffold, a pair of vertical frames installed in front of the lower end of the working scaffold, and a scaffold installed between the vertical frames, A rear leg member composed of a pair of vertical frames installed at the rear of the lower end of the working scaffold and a scaffold installed between the vertical frames, a first link frame having a tip axially coupled to the front leg member, the first link frame A working frame connected to the end and having a right triangle shape and passing through a through hole formed in the vertical frame of the rear leg member, a guide long hole formed in the working frame of the first link frame, and vertical of the rear leg member A guide pin installed in a frame and moving along the guide long hole according to the folding and unfolding operations of the rear leg member in a state fitted in the guide long hole, a second link frame having a tip axially coupled to the rear leg member, the second An operation frame connected to the end of the link frame and having a rectangular shape and passing through a through hole formed in the vertical frame of the front leg member, a guide long hole formed in the operation frame of the second link frame, and the front leg member A guide pin installed in the vertical frame of the guide pin that rides on the guide long hole according to the folding and unfolding motion of the front leg member in a state fitted in the guide long hole, and a hinge shaft coupled to the center abutting portion of the first and second link frames Including, first and second locking holes and folding holes are formed through the operation frame of the first link frame, respectively, and the hooking pins of the rear rocker member are selectively fitted into the first and second locking holes and the folding holes, respectively, To constrain the unfolding and folding of the rear leg member, first and second locking holes and folding holes are formed in the operation frame of the second link frame, and the front locker member is formed in the first and second locking holes and the folding holes. Each of the hook pins is selectively fitted and characterized in that it constrains the unfolding and folding of the front leg member.

The present invention has the effect of implementing a stable folding and unfolding operation of the front and rear leg members by installing a "X" type link member between the front and rear leg members.

In addition, the present invention allows the front and rear leg members to expand in two stages, so that the height of the working scaffold can be adjusted according to the working position, and the unfolding angle of the front and rear leg members can be individually adjusted according to the working situation. It has the effect of increasing practicality by allowing it to be adjusted.

1 is a view three-dimensionally showing the overall configuration of a cross-type insider ladder device according to a preferred embodiment of the present invention.
Figure 2 is an exploded three-dimensional view of Figure 1;
Figures 3 and 4 are diagrams showing the use of the cross-type insider ladder device shown in Figure 1, respectively.
5 is a plan sectional view showing a vertical frame coupling relationship between the operation frame of the first link frame and the rear leg member;
Figure 6 is a front sectional view of Figure 5;
7 is a view showing the side of the operation frame of the first link frame.
8 is a plan sectional view showing the vertical frame coupling relationship between the operation frame of the second link frame and the front leg member.
Fig. 9 is a front sectional view of Fig. 8;
10 is a view showing the side of the operating frame of the second link frame.

Figure 1 is a three-dimensional view showing the overall configuration of the ladder device according to a preferred embodiment of the present invention, Figure 2 is an exploded three-dimensional view of Figure 1, Figures 3 to 4 are sequentially showing the folding process of the ladder device it is one drawing

As shown in Figures 1 to 4, the cross-type insider ladder device constitutes an outer appearance of the front and rear leg members (20, 30) and the working scaffold (10).

The work platform 10 is a plate type of flat plate so that workers can perform works such as woodworking, painting, plastering, electricity, painting, film, and tiles while stepping on it. The working scaffold 10 rotates in forward and reverse directions with the hinge as a starting point in a state of being hinged to the upper surface of the vertical frame 22 of the front leg member 20, and is placed on or stored on the upper surface of the front and rear leg members. Make sure it is in close contact with the front of the front leg member.

A scaffold locker member 40 is installed on the working scaffold 10 . The footrest locker member 40 is provided for the purpose of maintaining a state seated on the upper surface of the front leg member 20 without the work footrest 10 being lifted during operation.

The front and rear leg members 20 and 30 are members for supporting the working scaffold in a state in which the working scaffold 10 is spaced apart from the ground by a predetermined height.

The front leg member 20 and the rear leg member 30 are connected to each other with a connecting link therebetween.

The front leg member 20 consists of a pair of vertical frames 22 and at least one scaffolding frame 24 that is connected and installed at a predetermined distance between the vertical frames 22 .

The vertical frame 22 serves as a pillar of the front leg member 20 , and the lower end is in contact with the ground, and the upper end thereof is installed in both lower front corners of the working platform 10 .

The scaffold frame 24 is installed between the vertical frames 22 and functions as a pedestal so that the operator can climb from the ground to the working scaffold 10 .

The rear leg member 30 has the same structure as the front leg member 20, preferably at least a pair of vertical frames 32 and at least a pair of vertical frames 32 are connected to each other at a predetermined distance apart. Consists of one or more scaffolding frames (34).

The connecting link connects the front leg member 20 and the rear leg member 30 to each other, and the front and rear leg members 20 and 30 are spread outward using the connecting link 40 as a guide, or Fold inward to make the worktable foldable.

The connecting link has first and second link frame frames 50 and 60 installed to cross each other in a large "X" shape, and a hinge shaft having one end coupled to the intersection point of the first and second link frames 50 and 60. (90).

These first and second link frames (50, 60) are narrowed or opened from the hinge shaft (90) according to the folding and unfolding operations of the front and rear leg members (20, 30), and the front and rear leg members (20, 30) guides the folding and unfolding motions.

The first and second link frames 50 and 60 constituting the connecting link have the same structure and are configured to be respectively disposed on both sides with the hinge shaft 90 interposed therebetween. The structure of the combined material 1 and 2 link frames 50 and 60 will be representatively described.

The first link frame 50 is arranged obliquely in the diagonal direction, and the front end thereof is axially coupled to the front leg member 20, and an operation frame having a shape of a right triangle is connected to the end thereof.

5 to 7 are a plan cross-sectional view, a front cross-sectional view, and a side view showing the coupling relationship between the operation frame 52 of the first link frame 50 and the vertical frame 32 of the rear leg member 30 .

As shown in FIGS. 5 to 7 , the operation frame 52 passes through the through hole 36 formed in the vertical frame 32 of the rear leg member 30 .

The operation frame 52 is manufactured to have a shape of a right triangle when viewed from the front. A folding hole 59 is formed through the upper vertex 52a of the operation frame 52 . In addition, the first locking hole 56 is formed through the outer vertex 52b of the operation frame 52, and the second locking hole 58 is formed through the inner vertex 52c of the opposite operation frame 52. .

In addition, the long guide hole 54 is formed through the operation frame 52, and the guide long hole 54 passes from the upper vertex 52a of the operation frame 52 through the outer vertex 52b, It reaches the inner vertex 52c to have a "∠" shape as a whole.

The guide pin 38 installed on the vertical frame 32 of the rear leg member 30 is inserted into the guide long hole 54 to guide the folding and unfolding operation of the rear leg member 30 .

The hooking pins 76 of the rear rocker member 70 are selectively fitted into the first and second locking holes 56 and 58, respectively, and the rear leg member 30 is unfolded according to the locking operation of the hooking pins 76. And the folding angle is adjusted in two stages step by step. At this time, since the first locking hole 56 is located at the outer vertex 52b of the operation frame 52, when the hook pin 76 of the rear locker member 70 is caught in the first locking hole 56, the rear The leg member 30 is fixed in a state that is spread outward the most (that is, a state that is unfolded in two stages), and the second locking hole 58 is located at the inner vertex 52c of the operation frame 52, When the hooking pin 76 of the rear rocker member 70 is hooked on the second locking hole 58, the rear leg member 30 is fixed in a state slightly spread outward (that is, in a state of being unfolded in one stage).

In addition, since the folding hole 59 is located at the upper vertex 52a of the operation frame 52, when the rear leg member 30 is completely folded inward, the hook pin 76 of the rear rocker member 70 is folded. It is inserted into the hole 59 to maintain the folded state of the rear leg member 30 .

The operation frame 52 of the first link frame 50 is folded and unfolded of the rear leg member 30 while being inserted into the through hole 36 formed in the vertical frame 32 of the rear leg member 30 . During operation, it passes through the through hole 36 to guide the folding and unfolding operations of the rear leg member 30 without interference.

The rear rocker member 70 allows the rear leg member 30 to unfold and fold in two stages in two stages, and to maintain a fixed state so that the rear leg member 30 does not flow at each stage. is the absence of

The rear rocker member 70 is bent perpendicularly to the lever 72 and one end of the lever 72 and is inserted so as to be drawn out into the groove 39 formed on the side surface of the vertical frame 32 . The fixing pin 74 is bent perpendicularly to the other end of the lever 72 and is formed in the automatic frame 52 of the first link frame 50 according to the pulling and pulling operation of the lever 72 . , 2 locking holes 56 and 58 and a hook pin 76 selectively hooked to the folding hole 59, respectively, is inserted into the groove 31 formed in the vertical frame 32, and the fixing pin 74 is drawn out. and a spring 78 that elastically supports the insertion operation.

The second link frame 60 is obliquely disposed in an oblique direction opposite to the oblique direction of the first link frame 50, the front end of which is axially defective in the rear leg member 20, and the end is The horizontal bending part 62 is formed to be extended by bending it at a predetermined angle to face horizontally.

8 to 10 are plan cross-sectional views, front cross-sectional views and side views showing the coupling relationship between the operation frame 62 of the second link frame 60 and the vertical frame 22 of the front leg member 20 .

8 to 10 , the operation frame 62 passes through the through hole 26 formed in the vertical frame 22 of the front leg member 20 .

The operation frame 62 is manufactured to have a shape of a right triangle when viewed from the front. A folding hole 69 is formed through the upper vertex 62a of the operation frame 62 . In addition, the first locking hole 66 is formed through the outer vertex 62b of the operation frame 62, and the second locking hole 68 is formed through the inner vertex 62c of the opposite operation frame 62. .

In addition, the long guide hole 64 is formed through the operation frame 62, and the guide long hole 64 passes through the outer vertex 62b from the upper vertex 62a of the operation frame 62, It reaches the inner vertex 62c to have a "∠" shape as a whole.

The guide pin 28 installed on the vertical frame 22 of the front leg member 20 is inserted into the guide long hole 64 to guide the folding and unfolding operation of the front leg member 20 .

The hooking pins 86 of the front locker member 80 are selectively fitted into the first and second locking holes 66 and 68, respectively, and the front leg member 30 is unfolded according to the locking operation of the hooking pins 86. And the folding angle is adjusted in two stages step by step. At this time, since the first locking hole 66 is located at the outer vertex 62b of the operation frame 62, when the hook pin 86 of the front locker member 80 is caught in the first locking hole 66, the front The leg member 20 is fixed to the most outwardly opened state (that is, unfolded in two stages), and the second locking hole 68 is located at the inner vertex 62c of the operation frame 62, When the hooking pin 86 of the front locker member 80 is caught in the second locking hole 68, the front leg member 20 is fixed in a state slightly spread outward (that is, in a state of being unfolded in one stage).

The operation frame 62 of the second link frame 60 is folded and unfolded of the front leg member 20 while being inserted into the through hole 26 formed in the vertical frame 22 of the front leg member 20 . During operation, it passes through the through hole 26 to guide the folding and unfolding operations of the front leg member 20 without interference. In addition, since the folding hole 69 is located at the upper vertex 62a of the operation frame 62, when the front leg member 20 is completely folded inward, the hook pin 86 of the front rocker member 80 is folded. It is inserted into the hole 69 to maintain the folded state of the front leg member 20 .

The front rocker member 80 allows the unfolding and folding angles of the front leg member 20 to be made in two stages step by step, and to maintain a fixed state so that the front leg member 20 does not flow at each step. is the absence of

The front rocker member 80 is vertically bent at one end of the lever 82 and the lever 82 and is inserted so as to be drawn out into the groove 29 formed on the side of the vertical frame 22 . The first fixing pin 84 is bent perpendicularly to the other end of the lever 82 and is formed in the automatic frame 62 of the second link frame 60 according to the pulling and pulling operation of the lever 82 . , is inserted into the groove 21 formed in the vertical frame 22 and the hook pin 86 selectively hooked to the 2 locking holes 66 and 68 and the folding hole 69, respectively, and the fixing pin 84 is drawn out. and a spring 88 that elastically supports the insertion operation.

The ladder device configured in this way adjusts the angles of the front and rear leg members 20 and 30 in two stages according to the working situation, or when storing, the front and rear leg members 20 and 30 as shown in FIG. Fold it so that it can be completely folded for storage.

That is, the front and rear leg members 20 and 30 are unlocked by sequentially operating the front rocker member 80 and the rear rocker member 60 .

Next, when the front and rear leg members 20 and 30 are spread outward by the desired angle by the user, guide pins 28 and 38 installed on the vertical frames 22 and 32 of the front and rear leg members 20 and 30, respectively. ) moves on the guide long holes 54 and 64 formed in the operation frames 52 and 62 of the first and second link frames 50 and 60, respectively, and guides the front and rear leg members 20 and 30. .

At this time, for example, if the rear leg member 30 is to be spread wider than the front leg member 20, the hook pin 86 of the front rocker member 80 for fixing the front leg member 20 is attached to the second link. The hook pin 76 of the rear rocker member 70 for fixing the rear leg member 30 and to fit into the second locking hole 68 formed in the operation frame 62 of the frame 60 is the first By fitting into the first locking hole 66 formed in the operation frame 62 of the first link frame 50, the front leg member 20 and the rear leg member 30 are fixed at different unfolding angles from each other. It can be done, and this can be effectively used when ladder work is to be done in places (eg, wall construction) 0 where the unfolding angle of the front leg member 20 must be limited according to the working environment.

On the other hand, when storing the ladder device, the lock of the front and rear locker members 60 and 80 of the front and rear leg members 20 and 30 is released as shown in FIG. 4, and then the front leg member 20 and the rear leg member When the 30 is folded inward, the guide pins 28 and 38 of the front and rear leg members 20 and 30 are moved again on the guide long holes 54 and 64 of the first and second link frames 50 and 60. Then, when the folding of the front and rear leg members 20 and 30 proceeds, the first and second link frames 50 and 60 are also rotated around the hinge shaft 90 as a starting point and are erected to form a ladder device in the same manner as in FIG. can be folded Through this folding structure, it is possible to realize the ease of storage by reducing the volume of the ladder device as much as possible during storage.

10: work platform 20: front leg member
22: vertical frame 28: guide pin
30: rear leg member 32: vertical frame
38: guide pin 40: footrest locker member
50: first link frame 52: operation frame
54: guide long hole 56: first jamming hole
58: second locking hole 60: second link frame
62: operating frame 64: guide long hole
66: first jamming ball 68: second jamming ball
70: rear rocker member 80: front rocker member

Claims (1)

In the cross-type insider ladder device,
working scaffold (10);
A front leg member (20) consisting of a pair of vertical frames (22) installed in front of the lower end of the working scaffold (10) and a scaffold (24) installed between the vertical frames (22);
a rear leg member 30 comprising a pair of vertical frames 32 installed at the rear of the lower end of the working scaffold 10 and a scaffold 34 installed between the vertical frames 32;
a first link frame 50 having a front end axially coupled to the front leg member 20;
An operation frame 52 is connected to the end of the first link frame 50 and has a rectangular shape and passes through a through hole 36 formed in the vertical frame 32 of the rear leg member 30 . ;
a guide long hole 54 formed in the operation frame 52 of the first link frame 50;
It is installed in the vertical frame 32 of the rear leg member 30 and moves on the guide long hole 54 according to the folding and unfolding operation of the rear leg member 30 in a state of being inserted into the guide long hole 54. guide pins 38;
a second link frame (60) having a front end axially coupled to the rear leg member (30);
an operation frame 62 connected to the end of the second link frame 60 and having a rectangular shape and passing through a through hole 26 formed in the vertical frame 22 of the front leg member 20;
a guide long hole 54 formed in the operation frame 62 of the second link frame 60;
It is installed in the vertical frame 22 of the front leg member 20 and moves on the guide long hole 54 according to the folding and unfolding operation of the front leg member 20 in a state of being inserted into the guide long hole 54. guide pins 28 and;
It includes a hinge shaft (90) coupled to the center abutting portion of the first and second link frames (50, 60);
First and second locking holes 56 and 58 are formed at inner and outer vertices 52b and 52c of the operation frame 52 of the first link frame 50, and folding holes 59 at the upper vertices 52a. ) is formed through each;
The hooking pins 76 of the rear rocker member 70 are selectively fitted into the first and second locking holes 56 and 58 and the folding holes 59, respectively, and constrain the unfolding and folding of the rear leg member 30. to do;
The rear rocker member 70 is bent perpendicularly to the lever 72 and one end of the lever 72 and is inserted so as to be drawn out into the groove 39 formed on the side surface of the vertical frame 32 . The fixing pin 74 is bent perpendicularly to the other end of the lever 72 and is formed in the automatic frame 52 of the first link frame 50 according to the pulling and pulling operation of the lever 72. , 2 locking holes 56 and 58 and a hook pin 76 selectively hooked to the folding hole 59, respectively, and inserted into the groove 31 formed in the vertical frame 32, and the fixing pin 74 is drawn out. and a spring (78) resiliently supporting the insertion operation;
First and second locking holes 66 and 68 are formed at inner and outer vertices 62b and 62c of the operation frame 62 of the second link frame 60, and folding holes 69 are formed at the upper vertices 62a. ) is formed;
The first and second locking holes 66 and 68 and the folding holes 69 are each selectively fitted with the hook pins 86 of the front rocker member 80 to constrain the unfolding and folding of the front leg member 20 . and;
The front locker member 80 is a cross-type insider ladder device, characterized in that to be manufactured in the same structure as the rear rocker member (70).

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