A box lifting fixture

Abstract

The present invention provides a box lifting fixture, including a fixed seat, a base, a first sliding rod and a second sliding rod, a sliding seat, a first U-shaped slider, a second U-shaped slider, a first clamping device and a second clamping device, one end of the sliding seat is inserted into the U-shaped groove of the first U-shaped slider, and the other end is inserted into the U-shaped groove of the second U-shaped slider, both side walls of the U-shaped groove of the first U-shaped slider and the second U-shaped slider are abutted with compression springs, each of the compression springs abuts against the sliding seat, and the fixed seat and the sliding seat are respectively connected with a lifting rope. Before use, the distance between the sliding seat and the fixed seat can be adjusted in advance according to the size of the box to be lifted, so that the position of each clamping device can match the box when in use, without the need to manually adjust the position of the clamping device, which is more convenient to use. At the same time, the sliding rod plays a certain supporting role on the box, and the box is not easily deformed or damaged.

Description

Technical Field

[0001] The invention relates to a tool for loading and unloading a box, in particular to a box lifting fixture. Background Art

[0002] There are many mechanical products on the market (such as grinding machines, reducers or gearboxes, etc.) that are packed in wooden boxes for easy palletizing, transportation and warehouse stacking. After the mechanical products are loaded into wooden boxes, it is often necessary to move the wooden boxes to add accessories or to move the wooden boxes to seal the upper cover at the top of the wooden boxes. Since wooden boxes containing mechanical products are usually heavy, it is necessary to use a crane, forklift or manipulator to lift the wooden boxes and move them to the specified position, which requires the use of a lifting fixture.

[0003] Existing lifting clamps usually include two or four clamping devices, each of which is connected together by a lifting rope and connected to a crane, forklift or manipulator. When in use, the clamping device needs to be manually moved to the corresponding position to clamp the box, which is inconvenient to use. In addition, during the lifting process, since the lifting ropes connected to each clamping device are inclined relative to the horizontal plane, the direction of the tension is also inclined relative to the horizontal plane. While generating an upward component force, the tension will also generate a horizontal component force. After the horizontal component force acts on the wooden box, the box support structure is relatively poor without the upper cover plate, which can easily cause the box to deform, and even damage the box in serious cases.

[0004] In view of this, the applicant conducted an in-depth study on the structure of the box lifting fixture, which resulted in this case. Summary of the invention

[0005] The object of the present invention is to provide a box lifting fixture which is easy to use and the box is not easily deformed or damaged.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] 14. The lifting fixture of claim 13, wherein the first and second sliding bars are respectively fixedly connected between the fixed seat and the base, a sliding seat slidably connected to the first and second sliding bars at the same time, a first U-shaped slider slidably connected to the first slider, a second U-shaped slider slidably connected to the second slider, a first clamping device arranged on the fixed seat, and a second clamping device respectively or simultaneously arranged on the first U-shaped slider and the second U-shaped slider, wherein the first slider and the second slider are arranged parallel to each other, one end of the sliding seat is inserted into the U-shaped groove of the first U-shaped slider, and the other end is inserted into the U-shaped groove of the second U-shaped slider, and locking bolts for fixing the sliding seat relative to the corresponding sliding bar are respectively arranged at both ends of the sliding seat, compression springs are abutted on both side walls of the U-shaped groove of the first and second U-shaped sliders, and each of the compression springs abuts on the sliding seat, and a lifting rope is respectively connected to the fixed seat and the sliding seat, and one end of each of the lifting ropes is rotatably connected, fixedly connected or integrally connected to each other.

[0008] As an improvement of the present invention, a handle is provided on the base.

[0009] As an improvement of the present invention, the sling is a chain.

[0010] As an improvement of the present invention, there are two first clamping devices and two second clamping devices respectively.

[0011] As an improvement of the present invention, the first clamping device and the second clamping device both include a fixed clamping plate, a bracket fixedly connected to the fixed clamping plate, a movable clamping plate rotatably connected to the bracket, and a cylinder, a hydraulic cylinder, an electric push rod or a rotary motor for driving the movable clamping plate to swing. The fixed clamping plate of the first clamping device is fixedly connected or integrally connected to the fixed seat, and the fixed clamping plate of the second clamping device is fixedly connected or integrally connected to the first U-shaped slider or the second U-shaped slider.

[0012] As an improvement of the present invention, the fixed clamping plate of the first clamping device is away from the base relative to the movable clamping plate of the first clamping device, and the fixed clamping plate of the second clamping device is close to the base relative to the movable clamping plate of the second clamping device.

[0013] As an improvement of the present invention, the cross sections of the first sliding rod and the second sliding rod are both circular.

[0014] As an improvement of the present invention, a first anti-torsion arm is fixedly connected to the first U-shaped slider, and a first linear sliding sleeve mounted on the first sliding rod is provided on the first anti-torsion arm; a second anti-torsion arm is fixedly connected to the second U-shaped slider, and a second linear sliding sleeve mounted on the second anti-torsion arm is provided on the second anti-torsion arm.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects:

[0016] 1. By setting a sliding rod and slidingly connecting the sliding seat and the U-shaped slider on the sliding rod, the distance between the sliding seat and the fixed seat can be adjusted in advance according to the size of the box to be lifted before use, so that the position of each clamping device can match the box during use, and there is no need to manually adjust the position of the clamping device, which is more convenient to use. At the same time, the sliding rod plays a certain supporting role on the box, and the horizontal components of force on the sliding seat and the fixed seat offset each other, so the box is not easily deformed or damaged.

[0017] 2. By limiting the positional relationship between the movable clamping plate and the fixed clamping plate on each clamping device, the fixed clamping plate is always located outside the box body during use, which is beneficial to reducing the gap between two adjacent boxes during stacking.

[0018] 3. The provision of an anti-torsion arm helps to avoid deflection of the second clamping device and improves the stability of lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the box lifting fixture of the present invention, in which the connecting block and the return spring are shown in perspective;

[0020] Figure 2 It is a structural schematic diagram of the slide seat in the present invention.

[0021] The markings in the figure correspond to the following:

[0022] 10-fixed seat; 11-chain mounting seat;

[0023] 20-base; 21-first slide bar;

[0024] 22-second slide bar; 23-handle;

[0025] 30-sliding seat; 31-sliding hole;

[0026] 32- slit; 33- elastic part;

[0027] 34-perforation; 40-first U-shaped slider;

[0028] 41-compression spring; 42-first anti-torsion arm;

[0029] 43-first linear sleeve; 50-second U-shaped slider;

[0030] 51-second anti-torsion arm; 52-second linear sleeve;

[0031] 60-first clamping device; 61-fixed clamping plate;

[0032] 62-bracket; 63-movable splint;

[0033] 64-cylinder; 70-second clamping device. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] like Figure 1 and Figure 2 As shown, the present embodiment provides a box lifting fixture, including a fixed seat 10, a base 20, a first slide bar 21 and a second slide bar 22 respectively fixedly connected between the fixed seat 10 and the base 20, a slide seat 30 slidably connected to the first slide bar 21 and the second slide bar 22, a first U-shaped slider 40 slidably connected to the first slide bar 21, a second U-shaped slider 50 slidably connected to the second slide bar 22, a first clamping device 60 arranged on the fixed seat 10, and a second U-shaped slider 40 and a second U-shaped slider 50 respectively or simultaneously arranged on the first U-shaped slider 40 and the second U-shaped slider 50. The clamping device 70, that is, the second clamping device 70 can be only one, and the second clamping device 70 is simultaneously connected to the first U-shaped slider 40 and the second U-shaped slider 50. There can also be two second clamping devices 70, and the first U-shaped slider 40 and the second U-shaped slider 50 are respectively connected to a second clamping device 70. In this embodiment, the example of having two first clamping devices 60 and two second clamping devices 70 is used for explanation, and the first slide bar 21 and the second slide bar 22 are simultaneously located between the two first clamping devices 60 and between the two second clamping devices 70.

[0036] Preferably, in this embodiment, a handle 23 is provided on the base 20 so that the handle 23 can be held when carrying the box lifting fixture.

[0037] The first slide bar 21 and the second slide bar 22 are arranged parallel to each other, and the number of the first slide bar 21 and the second slide bar 22 can be set according to actual needs. In this embodiment, the first slide bar 21 and the second slide bar 22 are each provided as an example. The cross-sections of the first slide bar 21 and the second slide bar 22 can be the same or different, and the cross-sectional shapes can also be set according to actual needs, for example, the cross-sections can be set to be triangular, elliptical or square, etc. In this embodiment, the cross-sections of the first slide bar 21 and the second slide bar 22 are both circular.

[0038] The first U-shaped slider 40 and the second U-shaped slider 50 both include two support blocks slidably connected to corresponding sliding rods and a connecting plate connected between the two support blocks. The two support blocks and the connecting plate together form a U-shaped groove. The two side walls of the U-shaped groove are the side walls facing each other of the two support blocks, and the bottom of the U-shaped groove is a side wall of the connecting plate.

[0039] The two ends of the slide seat 30 are respectively connected to the first slide bar 21 and the second slide bar 22 in a one-to-one sliding manner. One end of the slide seat 30 connected to the first slide bar 21 is inserted into the U-shaped groove of the first U-shaped slider 40, and the other end connected to the second slide bar 22 is inserted into the U-shaped groove of the second U-shaped slider 50. The two ends of the slide seat 30 are respectively provided with locking bolts (not shown in the figure) for fixing the slide seat 30 and the corresponding slide bar relative to each other. Specifically, the slide seat 30 is a steel slide seat. Taking one end of the slide seat 30 as an example, the end of the slide seat 30 is provided with a sliding hole 31 for the corresponding slide bar to pass through and a locking bolt for the corresponding slide bar to pass through. The slit 32 connected to the sliding hole 31 has two elastic parts 33 formed on both sides of the slit 32. A through hole 34 is formed on one side of the slit 32, and a threaded hole (not shown in the figure) is formed on the other side. The locking bolt is inserted into the through hole 34 and is screwed in the threaded hole at the same time, and the nut of the locking bolt is tightly attached to the outer side of the sliding seat 30. In this way, by tightening the locking bolt, the two elastic parts 33 produce a slight elastic deformation, holding the corresponding sliding rod to achieve locking. When the sliding seat 30 needs to be slid, the locking bolt is loosened, and the two elastic parts 33 are elastically reset, so that the sliding seat 30 can be operated to slide relative to the sliding rod. In addition, compression springs 41 are pressed against both side walls of the U-shaped grooves of the first U-shaped slider 40 and the second U-shaped slider 50, that is, two compression springs 41 are arranged in each U-shaped groove, and these two compression springs 41 are respectively located on both sides of the slide seat 30, and each compression spring 41 is pressed against the slide seat 30. Of course, each compression spring 41 is mounted on the corresponding slide rod so that the slide rod can be used as a guide.

[0040] The fixed seat 10 and the sliding seat 30 are respectively connected with a lifting rope (not shown in the figure), each lifting rope has the same length, one end of each lifting rope is connected to each other in rotation, fixed connection or integral connection, and a hook for cooperating with a crane, a forklift or a manipulator is provided at the position where each lifting rope is connected to each other, so that it can be ensured that no matter which position the sliding seat 30 slides to, the position of the hook is always located between the fixed seat 10 and the sliding seat 30. Preferably, in this embodiment, the lifting rope is a chain, and the fixed seat 10 and the sliding seat 30 are respectively fixedly connected with a chain mounting seat 11 for connecting the chain. It should be noted that the lifting rope can also be a rigid rope, such as an iron rod, etc. In this case, the two lifting ropes can only be connected in rotation, and the fixed seat 10 and the sliding seat 30 can also only be connected in rotation with the lifting rope.

[0041] The first clamping device 60 and the second clamping device 70 can be the same device or different devices, and both can be conventional clamping devices, such as pneumatic grippers, hydraulic grippers, or clamping devices controlled by finger cylinders that can be directly purchased from the market. In this embodiment, the first clamping device 60 and the second clamping device 70 both include a fixed clamping plate 61, a bracket 62 fixedly connected to the fixed clamping plate 61, a movable clamping plate 63 rotatably connected to the bracket 62, and a pneumatic clamp for driving the movable clamping plate 63 to swing. Cylinder 64, hydraulic cylinder, electric push rod or rotary motor, here take setting cylinder 64 as an example for explanation, the cylinder body of cylinder 64 is rotatably connected to bracket 62, the piston rod of cylinder 64 is rotatably connected to movable clamping plate 63, and no matter the clamping device is in clamping state or opening state, the rotation connection shaft between the cylinder body of cylinder 64 and bracket 62, the rotation connection shaft between the piston rod of cylinder 64 and movable clamping plate 63, and the rotation connection shaft between movable clamping plate 63 and bracket 62 are arranged in a herringbone shape to avoid jamming. When in use, cylinder 64 is used to drive the lower end of movable clamping plate 63 to press against fixed clamping plate 61 or move away from fixed clamping plate 61 to achieve clamping and opening. In addition, the fixed clamping plate 61 of the first clamping device 60 is fixedly connected or integrally connected to the fixed seat 10, and the fixed clamping plate 10 of the second clamping device 70 is fixedly connected or integrally connected to the first U-shaped slider 40 or the second U-shaped slider 50.

[0042] Preferably, the fixed clamping plate 61 of the first clamping device 60 is away from the base 20 relative to the movable clamping plate 63 of the first clamping device 60, and the fixed clamping plate 61 of the second clamping device 70 is close to the base 20 relative to the movable clamping plate 63 of the second clamping device 70. In this way, the fixed clamping plate 61 can always be located on the outside of the box when in use, which is beneficial to reducing the gap between two adjacent boxes when stacked.

[0043] In addition, in order to prevent the deflection of the second clamping device 70 from affecting the stability of lifting, in the present embodiment, a first anti-torsion arm 42 is fixedly connected to the first U-shaped slider 40, and a first linear sleeve 43 sleeved on the second slide bar 22 is arranged on the first anti-torsion arm 42; a second U-shaped slider 50 is fixedly connected to the second anti-torsion arm 51, and a second linear sleeve 52 sleeved on the first slide bar 21 is arranged on the second anti-torsion arm 51. In this way, the slide bar can be used to stop rotation, and the anti-torsion arm has a certain leverage effect. Taking the first anti-torsion arm 42 as an example, when the torque on the first U-shaped slider 40 is transmitted to the second slide bar 22 through the first anti-torsion arm 42, due to the effect of the lever, the force acting on the second slide bar 22 is relatively small.

[0044] Before use, the distance between the slide seat 30 and the fixed seat 10 is adjusted in advance according to the size of the box to be lifted, so that the position of each clamping device can match the box when in use. When in use, the box lifting fixture is moved from top to bottom close to the box to be lifted, and then the box is clamped by each clamping device. In this process, if there is a matching error between the size of the box and the distance between the slide seat 30 and the fixed seat 10, the corresponding U-shaped slider will slide and compress the corresponding compression spring to achieve automatic adjustment.

[0045] The present invention is described in detail above with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, which all belong to the protection scope of the present invention.

Claims

1. A box lifting fixture, characterized in that: The invention relates to a method of making the first U-shaped sliding member and the second U-shaped sliding member movable in a direction of rotation from one end of the sliding member to the other end of the sliding member. The method comprises the following steps: first, a first sliding member and a second sliding member are connected to the first U-shaped sliding member and the second U-shaped sliding member respectively. The method comprises the following steps: first, a first sliding member and a second U-shaped sliding member are connected to the first U-shaped sliding member and the second U-shaped sliding member respectively. The method comprises the following steps: The first clamping device and the second clamping device both include a fixed clamping plate, a bracket fixedly connected to the fixed clamping plate, a movable clamping plate rotatably connected to the bracket, and a cylinder, a hydraulic cylinder, an electric push rod or a rotary motor for driving the movable clamping plate to swing. The fixed clamping plate of the first clamping device is fixedly connected or integrally connected to the fixing seat, and the fixed clamping plate of the second clamping device is fixedly connected or integrally connected to the first U-shaped slider or the second U-shaped slider. The fixed clamping plate of the first clamping device is away from the base relative to the movable clamping plate of the first clamping device, and the fixed clamping plate of the second clamping device is close to the base relative to the movable clamping plate of the second clamping device.

2. The box lifting fixture according to claim 1, characterized in that: A handle is arranged on the base.

3. The box lifting fixture according to claim 1, characterized in that: The lifting rope is a chain.

4. The box lifting fixture according to claim 1, characterized in that: There are two of each of the first clamping device and the second clamping device.

5. The box lifting fixture according to any one of claims 1 to 4, characterized in that: The cross sections of the first sliding bar and the second sliding bar are both circular.

6. The box lifting fixture according to claim 5, characterized in that: A first anti-torsion arm is fixedly connected to the first U-shaped slider, and a first linear sleeve mounted on the first sliding rod is provided on the first anti-torsion arm; a second anti-torsion arm is fixedly connected to the second U-shaped slider, and a second linear sleeve mounted on the second sliding rod is provided on the second anti-torsion arm.

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