KR20210101434A - Cross Slider Ladder Device - Google Patents

Abstract

According to the present invention, provided is a cross type slider ladder device including a front leg member, a rear leg member and first and second link frames connecting the front and rear leg members to be foldable to each other and combining the members through a hinge shaft in a state, in which the members cross with each other in an "X" form. The first link frame comprises: an outer frame pin-combined with a vertical frame of the rear leg member; and an inner frame inserted to be withdrawable from the inside of the outer frame to the outside and pin-combined with a vertical frame of the front leg member. The second link frame comprises: an outer frame pin-combined with the vertical frame of the front leg member; and an inner frame inserted to be withdrawable from the inside of the outer frame to the outside and pin-combined with the vertical frame of the rear leg member. Holes penetrated and connected to each other are formed in the center of the outer frames of the first and second link frames, guide elongated holes penetrated and connected with the holes are formed on the inner frames of the first and second link frames, and the hinge shaft is installed while penetrating the holes of the outer frames and the guide elongated holes of the inner frames.

Description

Cross Slider Ladder Device

The present invention relates to a cross-type slider ladder device, and more particularly, by installing a "X" type 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 slider 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 stepped scaffolding device having the same structure as in the prior art is used in a fixed state rather than a folded or overlapped 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 an "X"-shaped link member between the front and rear leg members constituting the step-type footrest. It is intended to provide a slider ladder device.

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

The present invention for achieving the above objects is a cross-type slider ladder device, a front leg member comprising 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 consisting 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 and the front and rear leg members are connected to each other so as to be folded and unfolded and crossed in an "X" shape It includes first and second link frames coupled to the hinge shaft in a state where the first and second link frames are pin-coupled to the vertical frame of the rear leg member, and the outer frame is inserted so as to be drawn out from the inside of the outer frame. and an inner frame that is pin-coupled to the vertical frame of the front leg member, the second link frame is an outer frame pin-coupled to the vertical frame of the front leg member; and an inner frame that is pin-coupled to the vertical frame of the rear leg member, and a hole for connecting and communicating with each other is formed in the center of the outer frame of the first and second link frames, and the inner frame of the first and second link frames It is characterized in that the hole is formed through a guide hole that communicates with the hole, and the hinge shaft is installed through the hole of the outer frame and the guide hole of the inner frame.

First and second locking holes and folding holes are respectively formed through the inner frame of the first link frame, and a rocker member is installed on the vertical frame of the front leg member, and the first and second locking holes of the inner frame are provided on the rocker member. It is preferable that the ball and the folding hole are provided with a hook pin that is selectively and separably fitted, respectively.

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"-shaped link member between the front and rear leg members.

In addition, the present invention enables the stepwise unfolding operation of the front and rear leg members in two stages, so that the height of the working platform 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 an exploded view showing the overall configuration of a cross-type slider ladder device according to a preferred embodiment of the present invention.
Figure 2 is a view showing a state in which the cross-type slider ladder device of Figure 1 is spread in two stages.
FIG. 3 is a diagram illustrating extracts of the first and second link frames of FIG. 2;
Figure 4 is a view showing a state in which the cross-type slider ladder device of Figure 1 is unfolded in one stage.
FIG. 5 is a diagram illustrating extracts of the first and second link frames of FIG. 4;
Figure 6 is a view showing a state in which the cross-type slider ladder device of Figure 1 is spread in two stages.
7 is a diagram illustrating extracts of the first and second link frames of FIG. 6;
Figure 8 is a view showing a cross-section of the rocker member of the cross-type slider ladder device in Figure 1;

1 is an exploded view showing the overall configuration of the cross-type slider ladder device according to a preferred embodiment of the present invention, and FIG. 2 is a view showing the state in which the cross-type slider ladder device of FIG. 1 is spread in two stages, Figure 3 is a view showing extracts of the first and second link frames of Figure 2, Figure 4 is a view showing a state in which the cross-type slider ladder device of Figure 1 is unfolded in one stage, Figure 5 is the second of Figure 4 1 and 2 link frames are extracted and shown, and FIG. 6 is a diagram showing a state in which the cross-type slider ladder device of FIG. 1 is unfolded in two stages, and FIG. 7 is an extract of the first and second link frames of FIG. 8 is a view showing a cross-section of the rocker member of the cross-type slider ladder device in FIG.

As shown in Figures 1 to 8, the cross-type slider ladder device constitutes an external appearance with the front and rear leg members (20, 30) and the working platform (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 11 is installed on the working scaffold 10 . The footrest locker member 11 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 use the connecting link as a guide to extend outward or turn inward. Make the workbench foldable so that it can be folded.

The connecting link has first and second link frame frames 50 and 70 installed to cross each other in a large "X" shape, and a hinge shaft 40 coupled to the intersection point of the first and second link frames 50 and 70. ) is composed of

The first and second link frames 50 and 70 are narrowed or opened from the hinge shaft 40 according to the folding and unfolding operations of the front and rear leg members 20 and 30, and the front and rear leg members 20, 30) guides the folding and unfolding motions.

The first and second link frames 50 and 70 constituting the connecting link have the same structure and are configured to be respectively disposed on both sides with the hinge shaft 40 interposed therebetween. The structure of the combined material 1 and 2 link frames 50 and 50 will be described representatively.

The first link frame 50 is disposed obliquely in the oblique direction, and the first link frame 50 has a double frame structure, preferably an outer frame 52 and an inner frame of the outer frame 52 . It consists of an inner frame 58 that is inserted so as to be withdrawn to the outside.

The end of the outer frame 52 is coupled with a pin 54 to the vertical frame 32 of the rear leg member 30 , and the end of the inner frame 58 is connected to the outer frame 52 through the end of the outer frame 52 . In a state of being inserted into the frame 52 , the tip thereof is pin-coupled to the vertical frame 22 of the front leg member 20 .

A hole 56 for the hinge shaft 40 to pass through is formed in the center of the outer frame 52 , and the hinge shaft 40 passes through the inner frame 58 , but the hinge shaft 40 passes through the inner frame 58 . As a guide, a long guide hole 60 having a predetermined length is formed through the outer frame 52 so as to be able to take out and draw in and out of the outer frame 52, and the hinge shaft 40 through the guide long hole 60. it penetrates

A front rocker member 90 is installed between the inner frame 58 and the vertical frame 22 of the front leg member 20 .

The rocker member 90 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 absent

The locker member 90 is fixed to a lever 92 and a groove 26 bent vertically at one end of the lever 92 and retractably inserted into a groove 26 formed on a side surface of the vertical frame 22 . The pin 94 is bent perpendicularly to the other end of the lever 92, and the first and second locking holes 62 and 64 formed in the inner frame according to the pulling and pulling-releasing operations of the lever 92, and the folding and folding function. A hook pin 96 selectively hung in the hole 66, and a spring 98 inserted into the groove 26 formed in the vertical frame 22 and elastically supporting the drawing and inserting operation of the fixing pin 84. consist of

Two first and second locking holes 62 and 64 and one folding hole 66 are sequentially formed through the inner frame 58, respectively.

The first and second locking holes 62 and 64 are each selectively fitted with the hook pins 96 of the locker member 90, and the front leg member 20 according to the locking operation of the locking pins 96. You can adjust the unfolding and folding angle of the product in two steps.

That is, when the hook pin 96 is inserted into the first locking hole 62, the front leg member 20 is fixed in the most unfolded state (that is, unfolded in two stages), and the hook pin 96 is When fitted in the second locking hole 64 , the front leg member 20 is fixed in a state in which it is slightly spread outward (ie, in a state in which it is unfolded in one stage). Also, after the front leg member 20 is completely folded inward, when the hook pin 96 is inserted into the folding hole 66 , the front leg member 20 can be fixed in a fully folded state for storage.

The second link frame 70 is obliquely disposed in a diagonal direction opposite to the diagonal direction of the first link frame 50 so as to cross the above-described first link frame 50 in an “X” shape, The second link frame 50 has a double frame structure, preferably an outer frame 72, and an inner frame 78 inserted so as to be withdrawn from the inside of the outer frame 72 to the outside.

The end of the outer frame 72 is coupled with a pin 74 to the vertical frame 22 of the front leg member 20 , and the end of the inner frame 78 is connected to the outer frame through the front end of the outer frame 72 . In a state of being inserted into the frame 72 , the front end thereof is pin-coupled to the vertical frame 32 of the rear leg member 30 .

A hole 76 for the hinge shaft 40 to pass through is formed in the center of the outer frame 72, and the hinge shaft 40 passes through the inner frame 78, but the hinge shaft 40 passes through the inner frame 78. As a guide, a long guide hole 80 having a predetermined length is formed through the outer frame 72 so as to be able to withdraw and withdraw into and out of the outer frame 72 , and the hinge shaft 40 is formed through the guide long hole 80 . it penetrates

The cross-type slider 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 completely overlaps the front and rear leg members 20 and 30 during storage. It will be folded and stored.

That is, the locking of the front leg members 20 and 30 is released by operating the rocker member 90 .

Next, when the user wants to fully spread the front and rear leg members at a desired angle, for example, when the front and rear leg members 20 and 30 are spread outward, respectively, as shown in FIGS. 2, 3 and 8 . The first and second link frames 50 and 70 of the connecting link rotate in opposite directions with respect to the hinge shaft 40 as a starting point and the inner frames 58 and 78 of the first and second link frames 50 and 70 is pulled out from the outer frames 52 and 72 of the first and second link frames 50 and 70, respectively, and guides the front and rear leg members 20 and 30 to be stably unfolded.

At this time, the inner frame 58 of the first link frame 50 is pulled out from the outer frame 52 using the hinge shaft 40 as a guide through the guide long hole 60, and the inner frame of the second link frame 70 is The frame 78 is pulled out from the outer frame 72 using the hinge shaft 40 as a guide through the guide long hole 80 .

When the front and rear leg members 20 and 30 are fully unfolded, the rocker member 90 is operated to move the inner frame 58 of the first and second link frames 50 to the front and rear leg members 20, 30) to the vertical frames 22. 32, respectively, to be latched and fixed.

That is, by pulling the lever 92 of the rocker member 90 and hooking the hook pin 96 to the first lock hole 62 formed in the inner frame 58 of the first link frame 50, it is fully unfolded. The operation of the front and rear leg members (20, 30) is locked in an unfolded state so that ladder work can be performed.

And when it is desired to narrow the spread width of the front and rear leg members 20 and 30 to one stage, the hooking pin 96 of the rocker member 90 is attached to the first link frame 50 as shown in FIGS. By hanging on the second locking hole 64 formed in the inner frame 58 of the front and rear leg members 20 and 30, the width of the front and rear leg members 20 and 30 can be fixed in a narrowed state to one stage.

On the other hand, when storing the ladder device, if the front leg member 20 and the rear leg member 30 are folded inward as shown in FIGS. 6, 7 and 8, the inner frame 58 of the first and second link frames 50 and 70 , 78) are drawn into the outer frames 52 and 72 of the first and second link frames 50 and 70, and at the same time, the first and second link frames 50 and 70 are hinged with the hinge shaft 40 as a starting point. It is folded and guides the folding of the front and rear leg members 20 and 30.

Next, when the folding of the front and rear leg members 20 and 30 is completed, the hook pin 96 of the rocker member 90 is inserted into the folding hole 66 formed in the inner frame 58 of the first link frame 50 . ), the front and rear leg members 20 are maintained in a folded state when inserted into each, and through this, the volume of the ladder device is reduced as much as possible during storage, thereby implementing ease of storage.

10: work platform 20: front leg member
22: vertical frame 30: rear leg member
32: vertical frame 40: footrest rocker member
50: first link frame 52: outer frame
58: inner frame 62: first jamming hole
64: second locking hole 66: folding hole
70: second link frame 72: outer frame
78: inner frame 90: rocker member
96: hook pin

Claims (2)

In the cross-type slider 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 composed of a pair of vertical frames 32 and a footrest 34 installed between the vertical frame 32 installed at the rear of the lower end of the working scaffold 10 and;
The front and rear leg members 20 and 30 are connected to each other so that they can be folded and unfolded, and first and second link frames 50 and 70 coupled to the hinge shaft 40 in a state where they are crossed in an "X" shape are included. and;
The first link frame 50 is;
an outer frame 52 coupled with a pin 54 to the vertical frame 32 of the rear leg member 30;
and an inner frame (58) inserted so as to be drawn out from the inside of the outer frame (52) and coupled to the vertical frame (22) of the front leg member (20) with a pin (60);
The second link frame 70 is;
an outer frame 72 coupled with a pin 74 to the vertical frame 22 of the front leg member 20;
and an inner frame (78) inserted so as to be drawn out from the inside of the outer frame (72) and coupled with a pin (80) to the vertical frame (32) of the rear leg member (30);
In the center of the outer frame (52, 72) of the first and second link frames (50, 70), holes (56, 76) through which they are connected are formed;
Inner frames 58 and 78 of the first and second link frames 50 and 70 are formed through guide long holes 60 and 80 communicating with the holes 56 and 76;
The hole (56, 76) of the outer frame (52, 72) and the guide long hole (60, 80) of the inner frame (58, 78), characterized in that the hinge shaft (40) is installed in a penetrating state. Cross-type slider ladder device.
The method of claim 1,
First and second locking holes 62 and 64 and folding holes 66 are respectively formed through the inner frame 58 of the first link frame 50, and the vertical frame 22 of the front leg member 20 is formed therethrough. A locker member 90 is installed in the locker member 90, and the locker member 90 is selectively separably fitted into the first and second locking holes 62 and 64 and the folding hole 66 of the inner frame 58, respectively. Cross-type slider ladder device, characterized in that it is provided with a hook pin (96).

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