Portal frame limiting device and forklift portal frame system

Abstract

The utility model discloses a door frame limiting device and a forklift door frame system, which comprise a fixed door frame and a limiting device arranged at the upper end of the fixed door frame, a sliding door frame vertically moving along the fixed door frame is arranged on the fixed door frame, and a gap is arranged between the limiting device and the side face of the sliding door frame. The sliding door frame is lifted and stretched to cause the door frame to swing, and the limiting device abuts against the side face of the sliding door frame to limit the swing amplitude of the sliding door frame not to exceed the gap range. By means of the mode, the swing amplitude of the portal frame in the lifting process can be limited, and the danger that goods on a pallet fork fall off and a forklift is tipped over due to excessive swing of the portal frame is prevented. And meanwhile, the limiting range of the swing amplitude of the portal can be controlled by controlling the screwing-in depth of the adjusting assembly through the portal limiting device.

Description

Technical Field

[0001] The utility model relates to the field of construction machinery, in particular to a gantry limiting device and a forklift gantry system. Background Art

[0002] Due to the deflection property of metal itself, the higher the lifting height of the forklift gantry, the greater the swing amplitude of the gantry, and the greater the risk of the goods on the fork falling and the forklift tipping over. Therefore, there is an urgent need for a gantry swing amplitude limiting device, which can withstand the side of the gantry when the gantry swings during lifting, preventing the gantry from swinging excessively and causing danger. Summary of the Utility Model

[0003] The main technical problem to be solved by the utility model is to provide a gantry limiting device for limiting the swing amplitude of the gantry during lifting, preventing the gantry from swinging excessively and causing the danger of the goods on the fork falling and the forklift tipping over. The utility model also provides a forklift gantry system.

[0004] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a gantry limiting device, including a fixed gantry and a limiting device arranged at the upper end of the fixed gantry. A sliding gantry that moves vertically along the fixed gantry is arranged on the fixed gantry. A gap is provided between the limiting device and the side of the sliding gantry. When the sliding gantry rises and stretches, it causes the gantry to swing, and the limiting device withstands the side of the sliding gantry to limit the swing amplitude of the sliding gantry not to exceed the range of the gap.

[0005] The sliding gantry is a multi-stage sliding gantry connected in sequence. The lower sliding gantry of each adjacent two-stage sliding gantries is a secondary sliding gantry, and the limiting device is arranged at the upper end of the secondary sliding gantry.

[0006] The multi-stage sliding gantries are connected by pulleys.

[0007] The limiting device is arranged on one side or both sides of the upper end of the fixed gantry.

[0008] The limiting device includes an adjusting plate and an adjusting component. A threaded hole is provided on the adjusting plate. The adjusting component and the adjusting plate are connected by threads. A gap is provided between the inner end of the adjusting component and the side of the sliding gantry. When the sliding gantry rises and stretches, it causes the gantry to swing, and the inner end of the adjusting component withstands the side of the sliding gantry, thereby limiting the swing amplitude of the sliding gantry not to exceed the range of the gap.

[0009] The adjusting component is one of a combination of a nut and a stud, a screw or a bolt.

[0010] The gap range is 1 mm - 3 mm. A notch is provided at the outer end of the adjusting assembly. The shape of the notch is a straight slot or a cross slot. By adjusting the screwing depth of the adjusting assembly on the adjusting plate through the notch, the gap between the inner end of the adjusting assembly and the side surface of the sliding gantry is controlled, that is, the swing amplitude range of the sliding gantry is limited between 1 mm and 3 mm.

[0011] A forklift mast system includes the mast limiting device described in any of the above technical solutions.

[0012] The beneficial effects of the present utility model are as follows: For a mast limiting device of the present utility model, when the mast swings during the lifting process, the device can withstand the side surface of the mast to prevent the mast from swinging excessively, which may cause the goods on the forklift forks to fall and the forklift to tip over. At the same time, the mast limiting device can also control the limiting range of the mast swing amplitude by controlling the screwing depth of the adjusting assembly. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present utility model;

[0014] Figure 2 is the enlarged structural diagram of Embodiment 1 of the present utility model;

[0015] Figure 3 is the exploded view of Embodiment 1 of the present utility model;

[0016] Figure 4 is the gap schematic diagram of Embodiment 1 of the present utility model;

[0017] Figure 5 is the gap schematic diagram in different working states of Embodiment 1;

[0018] Figure 6 is the structural schematic diagram of Embodiment 2.

[0019] 1. Fixed mast; 2. Sliding mast; 21. Secondary sliding mast; 3. Limiting device; 4. Gap; 5. Adjusting plate; 6. Adjusting assembly; 7. Threaded hole; 8. Nut; 9. Stud; 10. Notch; 11. Pulley. Detailed Embodiment

[0020] The following elaborates on the preferred embodiments of the present utility model in conjunction with the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0021] Embodiment 1

[0022] Please refer to Figure 1, A gantry limiting device of the present utility model includes a fixed gantry 1 and a limiting device 3 arranged at the upper end of the fixed gantry 1. A sliding gantry 2 is arranged on the fixed gantry 1 and moves vertically along the fixed gantry 1. A gap 4 is provided between the limiting device 3 and the side surface of the sliding gantry 2. See Figure 4 , when the sliding gantry 2 is lifted and stretched, it causes the gantry to swing. The limiting device 3 abuts against the side surface of the sliding gantry 2 to limit the swing amplitude of the sliding gantry 2 not to exceed the range of the gap.

[0023] In this embodiment, the limiting device 3 is arranged on both sides of the fixed gantry 1. In other embodiments, the limiting device 3 is only arranged on one side of the fixed gantry 1, and the effect of limiting the swing amplitude of the sliding gantry can also be achieved.

[0024] As Figure 2 and Figure 3 shown, the limiting device 3 includes an adjustment plate 5 and an adjustment component 6. A threaded hole 7 is provided on the adjustment plate 5. The adjustment component 6 and the adjustment plate 5 are threadedly connected. The inner end of the adjustment component 6 and the side surface of the sliding gantry 2 are provided with the gap 4.

[0025] The range of the gap 4 is 1 mm - 3 mm. See Figure 4 and Figure 5 , Figure 5 shown. The inner dotted line in Figure 5 shows the initial position of the sliding gantry 2, and the outer dotted line shows the maximum swing amplitude position of the sliding gantry. When the sliding gantry 2 is lifted and stretched, the sliding gantry 2 swings. When the sliding gantry 2 swings to the position of the outer dotted line in Figure 4 shown, the limiting device 3 abuts against the side surface of the moving gantry 2 to ensure that the swing amplitude of the sliding gantry 2 does not exceed the range of the gap shown in

[0026] The range of the gap 4 is 1 mm - 3 mm. Figure 3 In this embodiment, the adjustment component 6 is a combination of a nut 6 and a stud 9. See

[0027] , after the stud 9 passes through the nut 6 and the threaded hole 7 on the adjustment plate 5, a suitable gap 4 is left with the side surface of the sliding gantry 2, and then the nut 6 is tightened to the surface of the adjustment plate 5 to fix the stud 9. The gap 4 is the limiting range of the swing amplitude of the sliding gantry 2. In other embodiments, the adjustment component 6 can also be a screw or a bolt.

[0028] Furthermore, in this embodiment, the shape of the notch 10 is a straight line. In other embodiments, the shape of the notch 10 may be a cross.

[0029] Example 2

[0030] Figure 6 Another embodiment of a gantry limiting device provided by the utility model is shown, in which the sliding gantry 2 is a multi-stage sliding gantry, specifically, the multi-stage sliding gantry is a three-stage sliding gantry. The multi-stage sliding gantry is connected by a pulley 11. The limiting device 3 is used to limit the swing amplitude of the gantry between each two adjacent sliding gantry. Apart from this, the other structures are the same as those in embodiment 1. In other embodiments, the number of the multi-stage sliding gantry is more than three. In this embodiment, the multi-stage sliding gantry is a three-stage sliding gantry, and the sliding gantry located below in each two adjacent sliding gantry 2 is a secondary sliding gantry 21, and the upper end of the secondary sliding gantry is provided with the limiting device 3. By providing the limiting device 3 on the secondary sliding gantry 21 of each two adjacent sliding gantry, the swing amplitude of the sliding gantry between each two adjacent sliding gantry is limited, thereby limiting the swing amplitude of the entire gantry when lifting.

[0031] The gantry limiting device provided by the utility model can be applied to the forklift gantry system, the adjusting component 6 passes through the threaded hole 7 on the adjusting plate 5, and leaves a suitable gap 4 between the adjusting component 6 and the side of the sliding gantry 2, and the gap 4 is the limiting range of the swing amplitude of the sliding gantry 2. When the sliding gantry 2 is lifted and stretched, the sliding gantry 2 swings, and when the sliding gantry 2 swings to the maximum value of the gap 4, the side of the sliding gantry 2 will be supported by the inner end of the adjusting component 6, thereby limiting the swing amplitude of the sliding gantry 2 to not exceed the set gap range.

[0032] The utility model also provides a forklift gantry system, comprising the gantry limiting device described in any of the above technical solutions. Obviously, the forklift gantry system has all the beneficial effects of the above-mentioned rotating fixed structure of the traction chain, which will not be described in detail here.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A mast restraining device, characterized in that The invention comprises a fixed gantry (1) and a limiting device (3) arranged at the upper end of the fixed gantry (1); a sliding gantry (2) which moves vertically along the fixed gantry (1) is arranged on the fixed gantry (1); a gap (4) is arranged between the limiting device (3) and the side of the sliding gantry (2); the sliding gantry (2) is lifted and stretched to cause the gantry to swing, and the limiting device (3) presses against the side of the sliding gantry (2) to limit the swing amplitude of the sliding gantry (2) to not exceed the gap range.

2. A mast restraining device according to claim 1, characterized in that: The sliding door frame (2) is a multi-stage sliding door frame that is slidably connected in sequence, and the sliding door frame located at the bottom of each two adjacent stages of the sliding door frames (2) is a secondary sliding door frame (21), and the limiting device (3) is provided at the upper end of the secondary sliding door frame.

3. A mast restraining device according to claim 1, characterized in that: The limiting device (3) is arranged on one side or both sides of the upper end of the fixed door frame (1).

4. A mast restraining device according to claim 1 or 2, characterized in that: The limiting device (3) comprises an adjustment plate (5) and an adjustment component (6), the adjustment plate (5) is provided with a threaded hole (7), the adjustment component (6) and the adjustment plate (5) are connected by threads, and the gap (4) is provided between the inner end of the adjustment component (6) and the side of the sliding door frame (2).

5. A mast restraining device according to claim 4, characterized in that: The adjustment component (6) is a combination of a nut (8) and a stud (9), a screw or a bolt.

6. A mast restraining device according to claim 1 or 2, characterized in that: The gap (4) ranges from 1 mm to 3 mm.

7. A mast restraining device according to claim 5, characterized in that: The outer end of the adjustment component (6) is provided with a notch (10).

8. A mast restraining device according to claim 7, characterized in that: The shape of the notch (10) is a straight line or a cross.

9. A mast restraining device according to claim 2, characterized in that: The multi-stage sliding door frames are connected via pulleys (11).

10. A forklift gantry system, characterized in that: The invention comprises the portal frame restraining device according to any one of claims 1 to 9.

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