CN216971898U - Emergency exit structure suitable for spring layer material loading - Google Patents

Abstract

The utility model relates to the technical field of transfer equipment machinery, in particular to a safety door structure suitable for skip layer feeding, which comprises a door main body, wherein the door main body is arranged at a goods taking and placing position of a forklift of a skip layer platform, the door main body comprises a main frame body, a lifting guardrail component and a turning guardrail component, the lifting guardrail component is connected with the main frame body in a sliding mode, the turning guardrail component is connected with the main frame body in a rotating mode, the lifting guardrail and the turning guardrail are connected with each other through a linkage component, the linkage component comprises a pulley and a traction rope, the pulley is fixed on the main frame body, one end of the traction rope is fixedly connected with the turning guardrail component, and the other end of the traction rope bypasses the pulley and is connected with the lifting guardrail component. The utility model has simple integral structure, easy manufacture and popularization, high maintainability and reliability and easy operation, effectively ensures the safety of goods taking and placing in skip layer operation and ensures the production efficiency.

Description

Emergency exit structure suitable for spring layer material loading

Technical Field

The utility model relates to the technical field of transfer equipment machinery, in particular to a safety door structure suitable for skip layer feeding.

Background

When a transfer tool such as a forklift works, loading and unloading operation is often carried out on a skip-floor platform, wherein the skip-floor platform refers to a loading platform with a loading base surface higher than a forklift moving ground base. The goods stacking position of such operation occasions is usually an open structure, as shown in fig. 7, when loading is carried out, a forklift 91 ' lifts the goods 8 ' and then places the goods at the goods stacking position of the skip layer platform 1 ', and then workers on the skip layer platform 1 ' move the goods away by using a hydraulic hand trailer 92 ' or other forklifts; during blanking, the operation is reversed, the worker stacks the goods 8 ' in the goods stacking area of the skip-floor platform 1 ', and the fork teeth (the fork teeth are the fork teeth of the forklift for taking and putting the goods) of the forklift 91 ' are lifted to the goods taking height to take the goods. In the whole operation process, the goods piling and placing area of the skip layer platform has no safety measures, and large potential safety hazards exist. For example, the goods fall from the skip layer after being unpacked, and if people pass through the lower part or workers work, accidents are easily caused; moreover, even if the goods does not drop, before the staff who jumps the layer takes the goods away, can inspect the goods appearance generally, if the counterparty is not standard, needs manual adjustment, and at this moment, the staff also steps on empty the jump layer platform that falls in piling and putting goods region easily.

Among the prior art, some similar occasions adopt electricity and mechanical combination to build the emergency exit of automatic start-stop and avoid above-mentioned problem to take place, but this type of structure generally all adopts electric drive, and automatic switch also frequently breaks down easily or intermittent type is malfunctioning, influences work efficiency, and the occupation that sets up the place will also influence field layout, and the door is opened and close the process and is disturbed normal year of moving and carrying operation easily, and in addition, the cost of construction input and follow-up maintenance is also great, difficult popularization.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a safety door structure suitable for spring layer feeding, and solves the technical problems.

The technical problem solved by the utility model can be realized by adopting the following technical scheme:

a safety door structure suitable for skip layer feeding comprises a door main body, wherein the door main body is arranged at a forklift goods taking and placing position of a skip layer platform, the door main body comprises a main frame body, a lifting guardrail component and a turnover guardrail component, the lifting guardrail component is connected with the main frame body in a sliding mode, the turnover guardrail component is connected with the main frame body in a rotating mode, the lifting guardrail and the turnover guardrail are connected with each other through a linkage component,

the linkage subassembly includes pulley and haulage rope, the pulley is fixed in on the body frame body, the one end fixed connection of haulage rope upset guardrail subassembly, the other end are walked around connect behind the pulley lift guardrail subassembly, through the linkage subassembly makes the upset process of upset guardrail subassembly with the lift process of lift guardrail subassembly forms synchronous action the upset guardrail subassembly is turned down the back and is erect in the in-process of putting the goods position basal plane of spring layer platform, the lift guardrail subassembly promotes to top dead center position, perhaps the upset guardrail subassembly turn up the back draw in body frame body in-process, the lift guardrail subassembly descends to bottom dead center position, at this moment, the lift guardrail subassembly is located after drawing in the upset guardrail subassembly outside, both are face-to-face.

The utility model constructs the protective structures at the inner side and the outer side of the goods skip layer taking and placing platform through the lifting guardrail component, the overturning guardrail component and the like, and is easy to operate. During the use, because upset guardrail subassembly and lift guardrail subassembly are linkage structure, guardrail effect between them is interlocking effect, high efficiency and safety.

The lifting guardrail component comprises a vertical frame and a guide wheel, the vertical frame comprises two vertically arranged first vertical rods and at least two transversely arranged first transverse rods, and two ends of any one first transverse rod are respectively connected with one first vertical rod;

and any one of the vertical rods is provided with a guide wheel set which comprises at least one guide wheel, so that the guide wheel is in rolling connection with the vertical rod of the main frame body, and the lifting guardrail component has the capability of integrally sliding and lifting along the vertical rod of the main frame body.

Upset guardrail subassembly includes upper ledge, lower frame and two stabilizer blades, the upper ledge with the lower frame is trilateral frame shape structure by two first vertical poles that are parallel to each other and a second horizontal pole connection, and it sets up as follows: in the upper frame, the second cross rod is connected between the two first longitudinal rods, one end of each of the two first longitudinal rods is respectively and rotatably connected with two oppositely arranged vertical rods of the main frame body, and the other end of each of the two first longitudinal rods is respectively and rotatably connected with two support legs, so that the upper frame can be overturned and folded at the vertical rods of the main frame body;

the lower frame is arranged according to the structure of the upper frame, and the rotation connection point of the first vertical rod of the lower frame and the vertical rod of the main frame body is positioned below the rotation connection point of the first vertical rod of the upper frame and the same vertical rod of the main frame body at the same side.

When the lifting guardrail component is lowered to the position of the lower dead point, the overturning guardrail component is folded in the vertical rod of the main frame body and is close to the lifting guardrail component in the front and back direction, at the moment, the second cross rod of the upper frame is positioned above the second cross rod of the lower frame, and a first cross rod is arranged between the first cross rod and the second cross rod.

The main frame body comprises two groups of upright posts arranged on the left and right opposite sides, the two groups of upright posts are connected through a third cross rod to ensure that the two groups of upright posts are relatively fastened,

each group of upright rods comprises a front upright rod and a rear upright rod which are parallel and vertical to each other, and the top ends and the bottom ends of the front upright rod and the rear upright rod are respectively connected and then fastened by a second longitudinal rod;

the lifting guardrail component is connected with the left and right opposite vertical rods positioned on the front side of the main frame body in a sliding mode, and the overturning guardrail component is connected with the left and right opposite vertical rods positioned on the rear side of the main frame body in a sliding mode.

The main frame body comprises an inclined pull rod, and two ends of the inclined pull rod are respectively connected with the third cross rod and one group of the third cross rods.

And a guard plate is arranged between the adjacent first cross rods. Through setting up the backplate, can make the lift guardrail subassembly when realizing outside safeguard function, have the effect of jumping the layer platform after avoiding tiny goods to scatter.

Be equipped with the balancing weight on the stabilizer blade of upset guardrail subassembly to the realization of supplementary upset action.

The support end of the stabilizer blade of upset guardrail subassembly is equipped with the crashproof pad, when avoiding frequent upset operation from top to bottom, leads to each hookup location's of structure life to receive the influence because of the rigid collision of stabilizer blade and spring layer platform basal plane.

The door main body comprises an anti-overturning assembly, and the anti-overturning assembly is used for limiting the turnover guardrail assembly to be automatically overturned downwards after being subjected to self gravity or external impact when the turnover guardrail assembly is overturned upwards and folded to the main frame body.

The anti-falling assembly comprises a magnet, and the magnet is arranged on the turnover guardrail assembly or the main frame body.

Has the advantages that: by adopting the technical scheme, the integrated structure of the automatic safety door is simple and easy to manufacture and popularize, the automatic safety door is composed of a pure mechanical structure, so that the maintainability and the reliability of the automatic safety door are superior to those of a common electric automatic safety door structure, the automatic safety door is easy to operate, the problems of false triggering of an electric structure and the like do not exist in comparison with application occasions such as warehouses and the like with relatively poor working conditions, the high efficiency of daily goods taking and placing operation can be maintained through linkage of inner and outer side protection, the safety of goods taking and placing in skip-floor operation is effectively ensured, and the production efficiency is ensured.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1, as viewed from a front perspective;

FIG. 3 is a schematic view of the structure of FIG. 1, viewed from a left side perspective;

FIG. 4 is a schematic diagram of the structure of FIG. 1 from a top view;

FIG. 5 is a schematic view of the structure of FIG. 3 after being folded;

FIG. 6 is a schematic view of a usage scenario of the present invention;

fig. 7 is a schematic diagram of the loading of a forklift on a skip-floor platform in the prior art.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific drawings. It is noted that the terms "first," "second," "third," "fourth," and the like (if any) in the description and in the claims of the utility model are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises" or "comprising," and any variations thereof, are intended to cover non-exclusive inclusions, such that a product or apparatus that comprises a list of elements or units is not necessarily limited to those elements or units expressly listed, but may include other elements or units not expressly listed or inherent to such product or apparatus.

Referring to fig. 1 to 6, an emergency exit structure suitable for leap layer material loading, includes door main part 2, and door main part 2 sets up and gets in the fork truck of leap layer platform 1 and put the goods position, and goods 8 are got in this region through fork truck 9 and are put. The door main body comprises a main frame body, a lifting guardrail component and a turnover guardrail component, wherein the lifting guardrail component is connected with the main frame body in a sliding way, the turnover guardrail component is connected with the main frame body in a rotating way, the lifting guardrail and the turnover guardrail are connected with each other through a linkage component,

the linkage subassembly includes pulley 402 and haulage rope 10, pulley 402 is fixed in on the body frame body, the one end fixed connection upset guardrail subassembly of haulage rope 10, the other end is walked around pulley 402 back and is connected the lift guardrail subassembly, the upset process that makes the upset guardrail subassembly and the lift process of lift guardrail subassembly form the synchronization action through the linkage subassembly, erect the in-process of putting the goods position basal plane of spring layer platform 1 after the upset guardrail subassembly turns down, the lift guardrail subassembly promotes to top dead center position, perhaps, turn over the back and draw in the body frame body in-process on the guardrail subassembly that overturns, the lift guardrail subassembly descends to bottom dead center position, at this moment, the lift guardrail subassembly is located the upset guardrail subassembly outside after drawing in, both are face-to-face.

The lifting guardrail assembly can be arranged according to the following structure: in some embodiments, the lifting fence assembly comprises a mullion and a guide wheel 401, the mullion comprises two vertically arranged first vertical rods 301, at least two transversely arranged first cross rods 501, and two ends of any one first cross rod 501 are respectively connected with one first vertical rod 301;

any one of the first vertical rods 301 is provided with a guide wheel set, and the guide wheel set comprises at least one guide wheel 401, so that the guide wheel 401 is connected with the vertical rod 302 of the main frame body in a rolling manner, and the lifting guardrail assembly has the capability of lifting along the vertical rod 302 of the main frame body in an integral sliding manner.

Specifically, the guide wheel sets may adopt an external clamping structure or an internal clamping structure, and when the external clamping structure is adopted, each guide wheel set includes at least two guide wheels 401, so that the guide wheel sets are clamped on two opposite side walls of the upright stanchions 302 of the main frame body through the at least two guide wheels 401, and the lifting guardrail assembly is provided with an up-down lifting stroke while being integrally supported, and fig. 1 to 6 of the present invention show that the structures are the external clamping structures; when an inner clamping type structure is adopted, grooves are formed in the opposite side faces of two opposite vertical rods of the main frame body, and the guide wheels roll in the grooves after being clamped in the grooves, so that the lifting guardrail component is integrally supported and has an up-and-down lifting stroke.

In addition, also can get rid of the guide pulley, replace for the slider realizes the lift of lift guardrail subassembly, can follow the setting at this moment: all set up the recess on the face-to-face side of the pole setting of two face-to-face settings of body frame body, set up the slider on the first montant of the mullion of lift guardrail subassembly, the recess is gone into to the slider card to make the slider only slide in the recess, realize that lift guardrail subassembly has the effect of lift stroke. On this basis, also can set up simultaneously behind the guide pulley and cooperate the slider to realize better lift effect.

It should be noted that, in the present invention, the lifting guardrail assembly has a certain lifting stroke, the specific positions of the top dead center and the bottom dead center of the lifting stroke are not limited, and it only needs to satisfy that, when the lifting guardrail assembly is at the top dead center, an opening convenient for the forklift to take and place goods is left outside the goods stacking area, and when the lifting guardrail assembly is at the bottom dead center, a stop is formed outside the goods stacking area.

The turnover guardrail component can be arranged according to the following structure: in some embodiments, the roll-over fence assembly comprises an upper frame, a lower frame, and two legs 303, the upper frame and the lower frame being connected by two parallel first longitudinal bars 601 and a second transverse bar 502 in a three-sided frame configuration, which are arranged as follows: in the upper frame, the upper frame is provided with a plurality of grooves,

the second cross bar 502 is connected between the two first longitudinal bars 601, one end of each of the two first longitudinal bars 601 is respectively and rotatably connected with the two oppositely arranged vertical bars 302 of the main frame body, and the other end of each of the two first longitudinal bars 601 is respectively and rotatably connected with the two support legs 303, so that the upper frame can be folded at the vertical bars 302 of the main frame body;

the lower frame is arranged according to the structure of the upper frame, and the rotation connection point of the first vertical rod of the lower frame and the vertical rod of the main frame body is positioned below the rotation connection point of the first vertical rod of the upper frame and the same vertical rod of the main frame body on the same side.

In some preferred embodiments, the second cross bar 502 is perpendicular to the first longitudinal bar 601 connected to the second cross bar in the upper frame and the lower frame.

In other preferred embodiments, the location at which the second cross bar 502 is attached is at the end of the first side rail 601 to maximize the area encompassed by the inverted guardrail assembly after inversion, which determines the maximum size of cargo 8 that can be placed; the first longitudinal bar end connected to the second transverse bar 502 is also pivotally connected to the legs on the same side.

In order to realize better protection effect, the second cross rod 502 of the upper frame and the lower frame of the turnover guardrail assembly and the first cross rod 501 of the lifting guardrail assembly can be arranged as follows:

when the lifting guardrail component is lowered to the position of the lower dead point, the turnover guardrail component is folded at the upright stanchion 302 of the main frame body and is close to the lifting guardrail component in the front-back direction, at the moment, the second cross rod 502 of the upper frame is positioned above the second cross rod 502 of the lower frame, and a first cross rod 501 is arranged between the two.

In some preferred embodiments, when the lifting fence assembly is lowered to the bottom dead center position, the roll-over fence assembly is folded at the upright 302 of the main frame body to be in a front-to-back close position relation with the lifting fence assembly, and at this time, the second cross bar 502 of the upper frame is located above the second cross bar 502 of the lower frame, there is a first cross bar 501 between the two, and at least one first cross bar 501 is located below the second cross bar 502 of the lower frame.

In order to improve the structural strength of the main frame body and improve the stability of the main frame body in the front-back direction, the utility model can be arranged according to the following structure:

the body frame body is connected through third horizontal pole 503 between two sets of pole settings including controlling two sets of pole settings that subtend side set up, makes two sets of pole settings fastening relatively, and third horizontal pole 503 is connected in the top of two sets of pole settings.

Each group of upright rods comprises a front upright rod 302 and a rear upright rod 302 which are parallel and vertical to each other, and the top ends and the bottom ends of the front upright rod and the rear upright rod are respectively connected and then fastened by a second longitudinal rod 602;

the lifting guardrail component is connected with the two opposite vertical rods 302 on the left and right of the front side of the main frame body in a sliding way, and the overturning guardrail component is connected with the two opposite vertical rods 302 on the left and right of the rear side of the main frame body in a turnover way.

In addition, in order to further improve the structural strength, a reinforcing rib 603 can be additionally arranged at the middle section of the vertical rods in the same group. The reinforcing ribs 603 are also of a vertical bar structure.

In order to improve the structural strength of the main frame body and improve the stability of the main frame body in the left and right directions, the utility model can be arranged according to the following structure:

the main frame body comprises an inclined pull rod 7, and the two ends of the inclined pull rod 7 are respectively connected with a third cross rod 503 and a group of vertical rods thereof.

In some preferred embodiments, the two sets of vertical rods are connected to the third cross rod 503 through one diagonal draw bar 7, so as to form a symmetrical diagonal draw structure of the diagonal draw bars, and the overall structural strength of the main frame body is better.

Here, after one end of the diagonal member 7 is connected to the third cross member 503, the other end can be connected to any one of the vertical members 302 of one of the sets of vertical members.

In addition, in the case of providing the reinforcing rib 603, one end of the diagonal member 7 connected to the vertical member 302 may be connected to the reinforcing rib 603.

In order to further realize the protection effect of the outer side of the goods taking and placing platform, the goods taking and placing platform can be arranged according to the following structure: in some embodiments, a guard (not shown) is disposed between adjacent first crossbars. Through setting up the backplate, can make the lift guardrail subassembly when realizing outside safeguard function, have the effect of jumping the layer platform after avoiding tiny goods to scatter. It should be noted that the first cross bar can be replaced by a whole or multiple guard plates to form a complete protection.

Under the above-mentioned circumstances of replacing first horizontal pole for the backplate, still can set up the sieve mesh on the backplate, make it have certain light transmissivity, influence normal work after avoiding sheltering from the illumination completely.

In order to reduce the operation burden of operators, the utility model can be arranged according to the following structure: in some embodiments, a weight is provided on the legs of the roll-over fence assembly to assist in the roll-over action. Frequent upset action can aggravate operating personnel's fatigue fast, consequently, through the balancing weight, can assist the upset operation, help alleviating operating personnel's fatigue, the indirect safety in production accident that reduces the maloperation rate and produce from this.

In order to prolong the service life of equipment and reduce the equipment damage accumulated by operation, the utility model can be arranged according to the following structure: in some embodiments, the support ends of the legs 303 of the guardrail assembly are provided with anti-collision pads (not shown), so as to avoid the influence on the service life of each connection position of the structure caused by the hard collision between the legs and the base surface of the skip-floor platform during frequent vertical overturning operations.

The anti-collision pad is made of rubber or silica gel and is arranged at the end part of the support leg 303, and the end part supports the foundation surface of the skip-layer platform after being turned over downwards by the turnover guardrail assembly.

The utility model belongs to a pure mechanical combined structure, the force is directly transmitted, after the turnover guardrail assembly is turned downwards, when the support legs contact and place the foundation, the impact action is transmitted to all parts of the whole structure, so that if the buffer treatment is not carried out, the loosening of the welding position or the setting position of the fastening piece of each structure is easy to frequently occur, although the problem cannot be completely solved by arranging the anti-collision pad, the influence caused by the problem can be effectively relieved.

The utility model aims to eliminate equipment misoperation generated by operation and avoid safety accidents caused by autonomous downward turning when the structure of the device is folded, and can be arranged according to the following structure: the door main part includes one and prevents the subassembly that falls, prevents that the subassembly that falls is used for when the upset guardrail subassembly is turned over and is drawn in to the body frame department, restricts it and receive self gravity or outside striking back independently to turn over down.

In some embodiments, the anti-rollover assembly includes magnets disposed on the rollover bar assembly or on the main frame body.

Specifically, the magnet of the anti-falling assembly can be arranged at a proper position of the longitudinal rod and the support leg of the upper frame or the lower frame of the turnover guardrail assembly, and the proper position is selected according to the following design rules: when the turnover guardrail component is turned upwards to a furling position, the arrangement position of the magnet faces the upright stanchion of the main frame body.

Or conversely, the magnet is arranged on the upright post of the main frame body.

In the utility model, in order to prevent the turnover guardrail component from accidentally turning over, the width of the upper frame (the width of the upper frame refers to the spacing distance between two vertical rods in the upper frame) can be set to be just clamped between the two vertical rods when the turnover guardrail component is folded between the vertical rods of the main frame body. As shown in fig. 5, the legs of the reversible guardrail assembly are attached to the uprights of the main frame, and the magnets 11 are embedded in the legs 303. It should be noted that the attachment position of the leg 303 may be a preferred position for the anti-fall assembly with the magnet structure.

In addition, in fig. 3 and 5 of the present invention, the illustrated structure widens the lifting fence assembly so that it can be viewed from the side (both illustrated structures are viewed from the left side of the main frame) in order to facilitate the clear view of the lifting fence assembly.

In the utility model, the cross rods are arranged in the left-right direction, the vertical rods and the vertical rods are arranged in the vertical direction, and the longitudinal rods are arranged in the front-back direction.

In conclusion, the utility model constructs a relatively comprehensive inner and outer side protection structure at the traditional goods taking and placing platform with height fall, improves the operation safety and ensures the operation efficiency. During the use, because upset guardrail subassembly and lift guardrail subassembly are linkage structure, guardrail effect between them is interlocking effect. That is to say, when the forklift discharges or takes materials from the lower layer to the skip layer platform, the turnover guardrail component can be lifted to an upper dead point after being turned down, at the moment, the outer side of the goods stacking area is opened to form an opening convenient for the forklift to take and place the goods, the turnover guardrail component turned down on the inner side of the goods stacking area blocks personnel, the personnel cannot enter the goods stacking position at will, and the personnel safety in the forklift operation process is ensured; when people on the skip-floor platform need to take goods, the turnover guardrail component needs to be turned upwards and then empty the space for taking the goods, the lifting guardrail component simultaneously descends to a lower dead center position and then is in a blocking structure at the opening of the forklift for taking and putting the goods, and at the moment, the forklift cannot carry out loading, obtaining and taking the goods; the upset guardrail subassembly after turning up then draws in the body frame body, and the lift guardrail subassembly after descending is in the same place in the front and back closely, and two subassemblies all are vertical in tandem, and horizontal railing on it also can form the dislocation structure, observes on the whole, and the railing distributes more closely (for example there is a horizontal railing that is located the upset guardrail subassembly of inboard between two horizontal railings that are located the lift guardrail subassembly in the outside), strengthens the guardrail protective effect.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A safety door structure suitable for skip layer feeding comprises a door main body, wherein the door main body is arranged at a goods taking and placing position of a forklift of a skip layer platform, and is characterized in that the door main body comprises a main frame body, a lifting guardrail component and a turnover guardrail component, the lifting guardrail component is connected with the main frame body in a sliding manner, the turnover guardrail component is connected with the main frame body in a rotating manner, the lifting guardrail component and the turnover guardrail component are connected with each other through a linkage component,

the linkage assembly comprises a pulley and a traction rope, the pulley is fixed on the main frame body, and one end of the traction rope is fixedly connected with the turnover guardrail assembly and the other end of the traction rope bypasses the pulley and then is connected with the lifting guardrail assembly.

2. The safety door structure suitable for skip layer loading according to claim 1, wherein the lifting guardrail assembly comprises a vertical frame and a guide wheel, the vertical frame comprises two vertically arranged first vertical rods and at least two transversely arranged first transverse rods, and two ends of any one first transverse rod are respectively connected with one first vertical rod;

and a guide wheel group is arranged on any one of the first vertical rods and comprises at least one guide wheel, and the guide wheel is connected with the vertical rod of the main frame body in a rolling manner.

3. The safety door structure suitable for spring layer loading according to claim 1, wherein the turnover guardrail assembly comprises an upper frame, a lower frame and two support legs, the upper frame and the lower frame are connected by two first longitudinal rods and a second transverse rod which are parallel to each other to form a three-side frame structure, and the three-side frame structure is provided with the following components: in the upper frame, the second cross rod is connected between the two first longitudinal rods, one end of each of the two first longitudinal rods is respectively and rotatably connected with two opposite vertical rods of the main frame body, and the other end of each of the two first longitudinal rods is respectively and rotatably connected with two support legs;

the lower frame is arranged according to the structure of the upper frame, and the rotation connection point of the first vertical rod of the lower frame and the vertical rod of the main frame body is positioned below the rotation connection point of the first vertical rod of the upper frame and the same vertical rod of the main frame body at the same side.

4. The safety door structure suitable for skip floor feeding according to claim 3, wherein the main frame body comprises two groups of vertical rods arranged on the left and right opposite sides, the two groups of vertical rods are connected through a third cross rod, each group of vertical rods comprises a front vertical rod and a rear vertical rod which are parallel to each other, and the top ends and the bottom ends of the two vertical rods are respectively connected and fastened through a second longitudinal rod;

the lifting guardrail component is connected with the left and right opposite vertical rods positioned on the front side of the main frame body in a sliding manner, and the overturning guardrail component is connected with the left and right opposite vertical rods positioned on the rear side of the main frame body.

5. The safety door structure suitable for skip layer loading according to claim 4, wherein the main frame body comprises a diagonal draw bar, and two ends of the diagonal draw bar are respectively connected with the third cross bar and a group of the vertical bars.

6. The safety door structure suitable for skip layer loading according to claim 2, wherein a guard plate is arranged between the adjacent first cross bars.

7. The safety door structure suitable for spring layer loading according to any one of claims 1 to 5, wherein a weight block is arranged on the support leg of the turnover guardrail assembly.

8. The safety door structure suitable for skip layer loading according to any one of claims 1 to 5, wherein the support ends of the legs of the turnover fence assembly are provided with crash pads.

9. The structure of the safety door for saltatory charging according to any of claims 1 to 5 wherein the door body comprises an anti-roll-over assembly.

10. The safety door structure suitable for skip layer feeding according to claim 9, wherein the anti-falling assembly comprises a magnet, and the magnet is disposed on the turnover fence assembly or the main frame body.

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