Folding guardrail device of safe and labor-saving cover plate

Abstract

A folding guardrail device of a safe and labor-saving type cover plate comprises a frame and a bottom plate, a first fence and a second fence which are symmetrical and a first bottom plate and a second bottom plate which are symmetrical are arranged on the four edges of the upper face of the frame respectively, and the first fence, the second fence, the first bottom plate and the second bottom plate are connected with the frame through overturning plug devices. Folding guardrails are installed on the side edges, away from the frame, of the first bottom plate and the second bottom plate through pin shaft devices respectively, each pin shaft device comprises connecting plates installed on the first bottom plate and the second bottom plate, connecting rods and pin shafts, the connecting rods and the pin shafts are installed on the folding guardrails, and the connecting rods are located between the two connecting plates and fixed together through the pin shafts. And the first fence and the second fence are fixed together with the adjacent first bottom plate, second bottom plate and folding guardrail through hooks. The device is simple in structure, easy to produce and manufacture and convenient to install and operate, solves the problem of the opening height of the bottom plate of the safe and labor-saving cover plate, is wide in application range, and has remarkable social and economic benefits.

Description

Technical Field

[0001] The utility model relates to a cover plate, in particular to a folding guardrail device of a safe and labor-saving cover plate. Background Art

[0002] At present, the conventional safe and labor-saving cover plate structure is two symmetrical bottom plates, and the bottom plate opening height is more than 1.1 meters. For small hanging holes (length and width less than 2 meters), the conventional safe and labor-saving cover plate cannot meet the use conditions. If a folding bottom plate is used, it will occupy effective space, which is essentially no different from a conventional cover plate, and the cover plate needs to be reinstalled, which is time-consuming and labor-intensive. Therefore, it is necessary to design a folding guardrail of a safe and labor-saving cover plate, and use a connecting device to achieve the opening height of the bottom plate to meet the existing needs, but there has been no relevant public reports so far. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a safe and labor-saving cover plate folding guardrail device, which can effectively solve the problem that the opening height of the existing cover plate bottom plate is low and cannot meet the safety height specification standards of the guardrail.

[0004] To achieve the above-mentioned purpose, the technical solution solved by the utility model is a folding guardrail device of a safe and labor-saving cover plate, a frame and a bottom plate, the four sides of the frame are respectively equipped with symmetrical first and second fences and symmetrical first and second bottom plates, the first fence, the second fence, the first bottom plate and the second bottom plate are connected to the frame via a flip plug device, the sides of the first bottom plate and the second bottom plate away from the frame are respectively equipped with folding guardrails via a pin shaft device, the pin shaft device includes a connecting plate installed on the first bottom plate and the second bottom plate, a connecting rod and a pin shaft installed on the folding guardrail, the connecting rod is located between the two connecting plates and fixed together via the pin shaft, when the folding guardrail device is opened, the first fence and the second fence are fixed together with the adjacent first bottom plate, the second bottom plate and the folding guardrail via a hook.

[0005] The utility model has the advantages of simple structure, easy production and manufacturing, convenient installation and operation, solving the problem of the opening height of the bottom plate of the safe and labor-saving cover plate, wide application range and remarkable social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is the main view of the utility model (open state).

[0007] Figure 2 It is a left view of the utility model (open state, including the first bottom plate and the second bottom plate closed state).

[0008] Figure 3 This utility model Figure 1 Enlarged view of part A.

[0009] Figure 4 This is a schematic diagram of the use state of the flip plug device of the utility model (wherein a is the outward flip state, b is the normal state, and c is the vertical state).

[0010] Figure 5 It is a front view of the hinge device structure of the utility model.

[0011] Figure 6 It is a top view (section view) of the hinge device structure of the utility model.

[0012] Figure 7 It is a side sectional view (left side view) of the hinge device of the utility model. DETAILED DESCRIPTION

[0013] The specific implementation of the utility model is described in detail below in conjunction with the drawings and specific circumstances.

[0014] In conjunction with the accompanying drawings, a folding guardrail device of a safe and labor-saving cover is provided, which includes a frame and a bottom plate. The frame 1 is provided with symmetrical first and second fences 6 and 61 and symmetrical first and second bottom plates 2 and 21 on four sides respectively. The first fence 6, the second fence 61, the first and second bottom plates 2 and 21 are connected to the frame 1 via a flip plug device 8. The sides of the first and second bottom plates 2 and 21 away from the frame 1 are provided with folding guardrails 3 via a pin shaft device respectively. The pin shaft device includes a connecting plate 73 installed on the first and second bottom plates 2 and 21, a connecting rod 71 and a pin shaft 72 installed on the folding guardrail 3. The connecting rod 71 is located between the two connecting plates 73 and fixed together via the pin shaft 72. When the folding guardrail device is opened, the first fence 6 and the second fence 61 are fixed together with the adjacent first and second bottom plates 2, 21 and folding guardrail 3 via a hook 5.

[0015] To ensure better implementation effect, the flip plug device 8 is a flip plug device applied to a safe and labor-saving cover plate of CN202220514139.8, including a plug and a plug-in warehouse, the plug including a tongue 81 and a card plate 82, the card plate 82 is U-shaped, and a U-shaped card groove 83 is formed between the upper plate and the lower plate of the card plate 82, the U-shaped closed end of the card plate 82 is fixedly connected to the mounting plate 84, and the tongue 81 is hinged on the open end of the upper plate of the card plate 82 through a first pin shaft 85; the plug-in warehouse includes a plug-in warehouse plate 86, a shaft 87 and a baffle 88, a baffle 88 with an upper plane lower than the upper plane of the plug-in warehouse plate 86 is welded at the front side opening of the plug-in warehouse plate 86, a shaft 87 is welded on the upper inner wall of the plug-in warehouse plate 86, and a sloped guide plate 89 in the same direction as the shaft 87 is installed in the lower part of the plug-in warehouse plate 86. When in use, the flip plug extends into the plug-in warehouse.

[0016] The first bottom plate 2 and the second bottom plate 21 are provided with a balancing arm device on the inner side thereof via a hinge device 4 .

[0017] The hinge device 4 is a hinge device in a hinged folding cover of CN202221503363.3, comprising two meshingly connected hinged parts, a first connecting plate 41 is installed on both sides of the hinged parts, a hinge shaft 42 on the hinged parts is fixed to the first connecting plates 41 on both sides via bearings 43, the hinged parts comprise a gear seat 44, a gear 45 and a hinge shaft 42, the two gear seats 44 are symmetrically arranged, gears 45 are installed in the two gear seats 44 via the hinge shaft 42, the two gears 45 are meshingly connected together, the hinge shaft 42 is installed in the center hole of the gear 45, and both ends of the hinge shaft 42 extend out of the gear seat 44 and are fixed to the first connecting plate 41 via bearings 43.

[0018] The balancing arm device includes an upper balancing arm 91, a lower balancing arm 92 and a counterweight 93. The upper balancing arm 91 is fixedly mounted on the inner side of the first folding base plate 2 and the second folding base plate 21. One end of the upper balancing arm 91 and the lower balancing arm 92 are respectively connected to two meshing gears in the hinge device 4, and the other end of the lower balancing arm 92 is equipped with a counterweight 93.

[0019] The sum of the unfolded heights of the first bottom plate 2 and the second bottom plate 21 and the unfolded height of the folding guardrail 3 is the same as the unfolded heights of the first fence 6 and the second fence 61 .

[0020] When the utility model is used in a specific way, Figure 2 As shown, the folding guardrail 3 is installed on the first bottom plate 2 and the second bottom plate 21, and the rest of the structure is the same as the existing device and is unchanged. When the cover is closed, the folding guardrail 3 is in a vertical state (the dotted part in the figure) and is located below (inside) the cover, and does not occupy any additional effective space. When the cover needs to be opened, the first fence 6, the second fence 61, the first bottom plate 2 and the second bottom plate 21 are opened in sequence. After opening, the height of the first bottom plate 2 and the second bottom plate 21 themselves is lower than the height of the first fence 6 and the second fence 61. At this time, the folding guardrail 3 is unfolded around the pin device. At this time, the height of the first bottom plate 2 and the second bottom plate 21 plus the height of the folding guardrail 3 is the same as the height of the first fence 6 and the second fence 61, meeting the height requirement.

[0021] The utility model has the advantages of simple structure, easy production and manufacturing, convenient installation and operation, and does not occupy the current effective space. There is no need to reinstall the cover plate. It has been verified by field use that it solves the problem of the opening height of the bottom plate of the safe and labor-saving cover plate. It has a wide range of applications and significant social and economic benefits.

[0022] It should be pointed out that the above is only a preferred embodiment of the utility model, and does not impose any form of limitation on the utility model. Any technician familiar with the profession can use the technical content disclosed above to make changes or modify them into equivalent embodiments with equivalent changes without departing from the technical solution of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A folding guardrail device for a safe and labor-saving cover plate, comprising a frame and a bottom plate, wherein the frame (1) is provided with symmetrical first fences (6) and second fences (61) and symmetrical first bottom plates (2) and second bottom plates (21) on four sides thereof, characterized in that: The first fence (6), the second fence (61), the first bottom plate (2) and the second bottom plate (21) are connected to the frame (1) via a flip plug device (8); the side edges of the first bottom plate (2) and the second bottom plate (21) away from the frame (1) are respectively provided with folding guardrails (3) via a pin shaft device; the pin shaft device comprises a connecting plate (73) installed on the first bottom plate (2) and the second bottom plate (21), a connecting rod (71) and a pin shaft (72) installed on the folding guardrail (3); the connecting rod (71) is located between the two connecting plates (73) and fixed together via the pin shaft (72); when the folding guardrail device is opened, the first fence (6) and the second fence (61) are fixed together with the adjacent first bottom plate (2), the second bottom plate (21) and the folding guardrail (3) via a hook (5).

2. The folding guardrail device of the safe and labor-saving cover plate according to claim 1 is characterized in that: The flip plug device (8) comprises a plug and a plug-in magazine, wherein the plug comprises a tongue (81) and a card plate (82), the card plate (82) being U-shaped, a U-shaped card slot (83) being formed between the upper plate and the lower plate of the card plate (82), the U-shaped closed end of the card plate (82) being fixedly connected to the mounting plate (84), and the tongue (81) being hingedly mounted on the upper plate open end of the card plate (82) via a first pin shaft (85); the plug-in magazine comprises a plug-in magazine plate (86), a shaft (87) and a baffle plate (88), a baffle plate (88) having an upper plane lower than the upper plane of the plug-in magazine plate (86) being welded at the front side opening of the plug-in magazine plate (86), a shaft (87) being welded on the upper inner wall of the plug-in magazine plate (86), and a sloped guide plate (89) being mounted in the lower part of the plug-in magazine plate (86) in the same direction as the shaft (87), and when in use, the flip plug is inserted into the plug-in magazine.

3. The folding guardrail device of the safe and labor-saving cover plate according to claim 1 is characterized in that: The inner sides of the first bottom plate (2) and the second bottom plate (21) are provided with a balancing arm device via a hinge device (4).

4. The folding guardrail device of the safe and labor-saving cover plate according to claim 3 is characterized in that: The hinge device (4) comprises two meshingly connected hinged parts, each of which is provided with a first connecting plate (41), a hinge shaft (42) on the hinged part being fixed to the first connecting plates (41) on both sides via bearings (43), the hinged part comprising a gear seat (44), a gear (45) and a hinge shaft (42), the two gear seats (44) being symmetrically arranged, the two gear seats (44) being provided with a gear (45) via the hinge shaft (42), the two gears (45) being meshingly connected together, the hinge shaft (42) being installed in a center hole of the gear (45), and both ends of the hinge shaft (42) extending out of the gear seat (44) being fixed to the first connecting plate (41) via bearings (43).

5. The folding guardrail device of the safe and labor-saving cover plate according to claim 3 is characterized in that: The balancing arm device comprises an upper balancing arm (91), a lower balancing arm (92) and a counterweight (93); the upper balancing arm (91) is fixedly mounted on the inner sides of the first folding bottom plate (2) and the second folding bottom plate (21); one end of the upper balancing arm (91) and the lower balancing arm (92) are respectively connected to two meshing gears in the hinge device (4); and the other end of the lower balancing arm (92) is equipped with a counterweight (93).

6. The folding guardrail device of the safe and labor-saving cover plate according to claim 1 is characterized in that: The sum of the unfolded heights of the first bottom plate (2), the second bottom plate (21) and the unfolded height of the folding guardrail (3) is the same as the unfolded heights of the first fence (6) and the second fence (61).

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