Controlled lifting pin device of container spreader

Abstract

The utility model relates to the field of container lifting appliances, and particularly discloses a controlled lifting pin device of a container lifting appliance, which comprises a base, a driving mechanism and a U-shaped semicircular fork, the driving mechanism is arranged on the base, the U-shaped semicircular fork is connected with the driving mechanism, an opening portion of the U-shaped semicircular fork penetrates through a lifting pin rod of the container lifting appliance in a sleeved mode, the width of the U-shaped opening portion of the U-shaped semicircular fork is smaller than the diameter of a nut at the upper end of the lifting pin rod, the driving mechanism drives the U-shaped semicircular fork to move up and down, and the U-shaped semicircular fork moves upwards to abut against the nut to jack up the lifting pin rod. And after the U-shaped semicircular fork moves downwards, the lifting pin rod retracts. According to the device, the lifting pin rod is jacked up through the electric push rod, rapid and automatic handling under the case outside locking condition is achieved, manual operation of personnel is not needed, and the handling efficiency and safety of case outside locking faults are improved.

Description

Technical Field

[0001] The utility model relates to the field of container spreaders, in particular to a controlled top pin device of the container spreader. Background Art

[0002] Container spreaders are the main tools for port production. The locks connecting the spreaders and containers are the key components of lifting. If the locks connecting the spreaders and containers are stuck by the top pin mechanism, it will directly affect the normal progress of loading and unloading. Due to the driver's bad operating habits or the non-standard container lock holes, the spreader locks are often not locked in place outside the container. For example, when one or more locks do not enter the container hole normally, the driver completes the opening and closing action, resulting in the four sets of spreader locks partially locked inside the box hole and partially locked outside the box hole. The top pin mechanism cannot be lifted again, causing the spreader and the container to be unable to separate. This situation where one or more locks are locked outside the box hole and the rest of the locks are opened and closed inside the box hole forms the so-called outside lock in container operations. The outside lock directly causes the spreader lock to be locked mechanically, and the spreader and the container cannot be separated. The locks need to be manually removed or the top pins need to be temporarily forced to be lifted.

[0003] At present, the solution to the above fault is generally to put some hard objects under the top pin and then put down the spreader, and use the hard objects to forcibly lift the top pin, or directly use ordinary crowbars and other tools to pry up the top pin to solve the problem. The above-mentioned temporary ordinary tools or unlocking methods require maintenance personnel to climb to the position of the faulty container eye to perform the above operations, which are unsafe and inefficient due to unprofessional tools. What's more, ordinary crowbars and other tools are likely to damage the limit parts of the spreader. If the limit parts are damaged, the maintenance scope is expanded and the maintenance time is delayed, which delays normal production, which will have a greater impact on loading and unloading work. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a controlled pin-lifting device for a container spreader, which uses an electric push rod to lift the pin-lifting rod, thereby realizing quick and automatic handling when the container is locked outside, without the need for manual operation by personnel, thereby improving the efficiency and safety of handling external locking failures of the container.

[0005] The technical solution of the utility model is a controlled pin-lifting device for a container spreader, comprising a base, a driving mechanism and a U-shaped semicircular fork;

[0006] The driving mechanism is arranged on the base, and the U-shaped semicircular fork is connected to the driving mechanism. The opening part of the U-shaped semicircular fork is inserted into the top pin rod of the container spreader. The width of the U-shaped opening part of the U-shaped semicircular fork is smaller than the diameter of the nut at the upper end of the top pin rod. The driving mechanism drives the U-shaped semicircular fork to move up and down, and the U-shaped semicircular fork moves upward to hit the nut to lift the top pin rod, and the top pin rod retracts after the U-shaped semicircular fork moves downward.

[0007] In an optional embodiment, the driving mechanism is an electric push rod mechanism.

[0008] In an optional embodiment, the U-shaped semicircular fork is connected to a push rod of the electric push rod mechanism.

[0009] In an optional embodiment, the driving mechanism also includes an upper support plate and a lower support plate, the top end of the push rod is connected to the upper support plate, and the U-shaped semicircular fork is connected to the upper support plate; the bottom end of the electric push rod mechanism is connected to the lower support plate, and the lower support plate is connected to the base.

[0010] In an optional embodiment, the U-shaped semicircular fork is connected to the upper support plate by bolts, and the lower support plate is connected to the base by bolts.

[0011] In an optional embodiment, the device also includes an electric push rod control circuit, which includes an interlocking contactor, the extension coil of the interlocking contactor is connected in series with the extension switch, the normally open contact corresponding to the extension coil is connected in series with the motor of the electric push rod mechanism, the retraction coil of the interlocking contactor is connected in series with the retraction switch, the normally open contact of the retraction coil is connected in series with the motor of the electric push rod mechanism; the normally closed contact of the extension coil is connected in series with the retraction coil, and the normally closed contact of the retraction coil is connected in series with the extension coil.

[0012] The utility model provides a controlled pin-lifting device for a container spreader, which has the following beneficial effects compared with the prior art: the opening of a U-shaped semicircular fork is inserted through the pin-lifting rod of the container spreader, and the U-shaped semicircular fork is driven by a driving mechanism to move up and down, and when moving upward, it pushes against the nut at the upper end of the pin-lifting rod and then pulls the pin-lifting rod to lift up and realize mechanical unlocking, and after the U-shaped semicircular fork moves downward again, the pin-lifting rod automatically retracts and restores normal function. The device uses an electric push rod to lift the pin-lifting rod, realizing quick and automatic handling when the container is locked outside, without manual operation by personnel, and improving the efficiency and safety of handling the failure of locking outside the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The utility model is a schematic structural diagram of a controlled top pin device of a container spreader provided in an embodiment of the utility model.

[0015] Figure 2 It is a schematic diagram of a U-shaped semicircular fork structure provided by an embodiment of the utility model.

[0016] Figure 3 It is a circuit diagram of an electric cylinder control circuit provided in an embodiment of the utility model.

[0017] In the figure, 1-nut, 2-thrust pin rod, 3-U-shaped semicircular fork, 4-upper support plate, 5-driving mechanism, 6-lower support plate, 7-base, KL1-extending coil, KL2-retracting coil, KL11-extending coil normally open contact, KL12-extending coil normally closed contact, KL21-retracting coil normally open contact, KL22-retracting coil normally closed contact, T1-extending switch, T2-retracting switch. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following implementation modes.

[0019] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] like Figure 1 and Figure 2 As shown, the controlled ejection pin device of a container spreader provided in this embodiment comprises a base 7, a driving mechanism 5 and a U-shaped semicircular fork 3. The driving mechanism 5 is arranged on the base 7, the U-shaped semicircular fork 3 is connected to the driving mechanism 5, and the opening of the U-shaped semicircular fork 3 is inserted through the ejection pin rod 2 of the container spreader.

[0022] The function of the U-shaped semicircular fork 3 is to use the thrust of the driving mechanism 5 to drive the ejector pin to be lifted when it is necessary to control the ejector pin to be lifted, and when the ejector pin mechanism does not need to be controlled by the driving mechanism 5, the ejector pin mechanism can operate normally and is not affected by the U-shaped semicircular fork 3. Specifically, the width of the U-shaped opening of the U-shaped semicircular fork 3 is smaller than the diameter of the nut 1 at the upper end of the ejector pin rod 2, and is used to synchronously lift the ejector pin rod 2 when the driving mechanism 5 extends to drive the U-shaped semicircular fork 3 to move upward. It should be noted that the driving mechanism 5 drives the U-shaped semicircular fork 3 to move up and down, and the U-shaped semicircular fork 3 moves upward to push against the nut 1 to lift the ejector pin 2. The width of the U-shaped opening of the U-shaped semicircular fork 3 is larger than the diameter of the ejector pin rod 2, ensuring that the ejector pin mechanism can operate normally when the driving mechanism 5 does not need to be controlled by the driving mechanism 5.

[0023] The driving mechanism 5 adopts an electric push rod mechanism, and exemplarily, an electric cylinder is used as the driving mechanism 5 for driving the U-shaped semicircular fork 3. The U-shaped semicircular fork 3 is connected to the push rod of the electric push rod mechanism, and the push rod is used to push and pull back the U-shaped semicircular fork 3. For easy installation, the driving mechanism 5 also includes an upper support plate 4 and a lower support plate 6, the top end of the push rod is connected to the upper support plate 4, and the U-shaped semicircular fork 3 is connected to the upper support plate 4; the bottom end of the electric push rod mechanism is connected to the lower support plate 6, and the lower support plate 6 is connected to the base 7. Among them, the U-shaped semicircular fork 3 is connected to the upper support plate 4 by bolts, and the lower support plate 6 is connected to the base 7 by bolts.

[0024] like Figure 3 As shown, the controlled push pin device of this embodiment also includes an electric push rod control circuit for controlling the operating state of the electric push rod. The electric push rod control circuit includes an interlocking contactor, the extension coil KL1 of the interlocking contactor is connected in series with the extension switch T1, the normally open contact KL11 corresponding to the extension coil KL1 is connected in series with the motor of the electric push rod mechanism, the retraction coil KL2 of the interlocking contactor is connected in series with the retraction switch T2, and the normally open contact KL21 of the retraction coil KL2 is connected in series with the motor of the electric push rod mechanism; the normally closed contact KL12 of the extension coil KL1 is connected in series with the retraction coil KL2, and the normally closed contact KL22 of the retraction coil KL2 is connected in series with the extension coil KL1. The extension switch T1 and the retraction switch T2 can be manual switches or electronic switches. For example, the extension switch T1 and the retraction switch T2 are connected to the controller in the crane, and the controller issues instructions to control the extension switch T1 and the retraction switch T2 to close and open. Exemplarily, when the push rod needs to be extended, the crane using the sling is operated to give a first instruction, the extension switch T1 is closed, the push rod obtains the P / N phase sequence power supply, the push rod is extended, and a force of 200KG is provided, synchronously driving the push pin rod 2 to lift up; when the force of the push pin mechanism needs to be canceled, a second instruction is given, the retraction switch T2 is closed, the push rod obtains the N / P phase sequence power supply, the push rod is retracted, and the push pin rod 2 is pulled back under the action of its own spring to resume normal function.

[0025] The above disclosure is only the preferred implementation mode of the utility model, but the utility model is not limited thereto. Any non-creative changes that can be thought of by technicians in this field, as well as several improvements and modifications made without departing from the principle of the utility model, should fall within the scope of protection of the utility model.

Claims

1. A controlled pin-lifting device for a container spreader, characterized in that: It includes a base, a driving mechanism and a U-shaped semicircular fork; The driving mechanism is arranged on the base, and the U-shaped semicircular fork is connected to the driving mechanism. The opening part of the U-shaped semicircular fork is inserted into the top pin rod of the container spreader. The width of the U-shaped opening part of the U-shaped semicircular fork is smaller than the diameter of the nut at the upper end of the top pin rod. The driving mechanism drives the U-shaped semicircular fork to move up and down, and the U-shaped semicircular fork moves upward to hit the nut to lift the top pin rod, and the top pin rod retracts after the U-shaped semicircular fork moves downward.

2. The controlled pin-lifting device of container spreader according to claim 1, characterized in that: The driving mechanism is an electric push rod mechanism.

3. The controlled pin-lifting device of container spreader according to claim 2, characterized in that: The U-shaped semicircular fork is connected with a push rod of the electric push rod mechanism.

4. The controlled pin-lifting device of container spreader according to claim 3, characterized in that: The driving mechanism also includes an upper support plate and a lower support plate. The top end of the push rod is connected to the upper support plate, and the U-shaped semicircular fork is connected to the upper support plate; the bottom end of the electric push rod mechanism is connected to the lower support plate, and the lower support plate is connected to the base.

5. The controlled pin-lifting device of container spreader according to claim 4, characterized in that: The U-shaped semicircular fork is connected to the upper support plate through bolts, and the lower support plate is connected to the base through bolts.

6. The controlled pin-lifting device of a container spreader according to any one of claims 1 to 5, characterized in that: The device also includes an electric push rod control circuit, which includes an interlocking contactor, the extension coil of the interlocking contactor is connected in series with the extension switch, the normally open contact corresponding to the extension coil is connected in series with the motor of the electric push rod mechanism, the retraction coil of the interlocking contactor is connected in series with the retraction switch, the normally open contact of the retraction coil is connected in series with the motor of the electric push rod mechanism; the normally closed contact of the extension coil is connected in series with the retraction coil, and the normally closed contact of the retraction coil is connected in series with the extension coil.

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