Mechanical interlocking device of lifting platform

Abstract

The utility model belongs to the technical field of industry, storage and the like, and particularly relates to a lifting platform mechanical interlocking device which comprises a bottom pit, two steel structures are arranged in the bottom pit at intervals, a door frame is fixed in front of the two steel structures, a first floor door is installed on the door frame, and a lifting platform is arranged in the door frame. A pulley support is fixed to the upper portion of each steel structure, the pulley supports are located above the first floor door, pulleys are arranged on the pulley supports, and a sliding way is arranged below the pulley supports. The lower portion of each steel structure is hinged to a pressing rod. One end of the steel wire rope is connected to the upper end face of the pressing rod, the other end of the steel wire rope is fixed to the stop lever after bypassing the pulley, the stop lever extends from one side of the first-floor door to the other side, and the two ends of the stop lever are slidably arranged in the slideways on the two sides. When the lifting platform descends to the bottom end of the first floor door, the pressing rod is driven to rotate downwards, the stop lever moves upwards, and the first floor door can be opened; when the lifting platform ascends to be separated from the pressing rod, the pressing rod rotates upwards, and the blocking rod moves downwards to block the first-floor door.

Description

Technical Field

[0001] The utility model belongs to the technical fields of industry, warehousing and the like, and specifically relates to a mechanical interlocking device for a lifting platform. Background Art

[0002] Hydraulic lifting platforms are widely used in industries such as industry and warehousing. They are mainly used for vertical transportation of goods. Hydraulic lifting platforms have the advantages of small footprint, simple structure and flexible installation.

[0003] At present, the first-floor door of this type of lifting platform is manually opened and closed with manual confirmation, and a safety interlock is set between the lifting platform, that is, the lifting platform is started after the door is closed, and the lifting platform is stopped after the door is opened. The above-mentioned safety interlock is only a linkage between the safety platform and the first-floor door, and cannot ensure that the lifting platform is exactly on the first floor when the first-floor door is opened. There is a risk of the lifting platform falling into the pit when the first-floor door is opened by mistake when the lifting platform is not on the first floor, and the safety level is low. Utility Model Content

[0004] In order to solve the problems in the above-mentioned background technology, the utility model provides a mechanical interlocking device for a lifting platform, which interlocks the lifting platform with a barrier rod. When the lifting platform leaves the first floor, the barrier rod blocks the first floor door and cannot be opened. When the lifting platform is on the first floor, the barrier rod leaves the first floor door and the first floor door can be opened smoothly.

[0005] The utility model adopts the following technical solutions:

[0006] A mechanical interlocking device for a lifting platform comprises a pit, wherein two steel structures are arranged in the pit at intervals, door frames are fixed in front of the two steel structures, a first-floor door is installed on the door frames, and a lifting platform is arranged in the door frames;

[0007] A pulley bracket is fixed to the upper part of each steel structure, the pulley bracket is located above the first-floor door, a pulley is provided on the pulley bracket, and a slide extending up and down is provided below the pulley bracket; a pressure rod is hingedly connected to the position corresponding to the lower end of the first-floor door at the lower part of each steel structure; one end of the steel wire rope is connected to the upper end face of the pressure rod, and the other end is fixed to the blocking rod after passing through the pulley. The blocking rod extends from one side of the first-floor door to the other side, and the two ends of the blocking rod are slidably set in the slides on both sides;

[0008] When the lifting platform descends to the bottom end of the first-floor door, it contacts the pressure rod and drives the pressure rod to rotate downward. The pressure rod drives the blocking rod upward to the top of the first-floor door through the wire rope; when the lifting platform rises and separates from the pressure rod, the pressure rod rotates upward and drives the blocking rod downward through the wire rope to block the first-floor door.

[0009] Furthermore, the weight of the blocking rod is greater than the weight of the two pressure rods.

[0010] Furthermore, the pressure rod is hingedly connected in the pit, and when the lifting platform is flush with the ground, the blocking rod is located above the first-floor door.

[0011] Furthermore, the slide is located at the upper part of the steel structure, and the bottom of the slide is lower than the upper end of the first-floor door. After the lifting platform is separated from the pressure rod, the blocking rod is located at the bottom of the slide.

[0012] Furthermore, after the lifting platform is separated from the pressure rod, the pressure rod is reset upward under the action of the blocking rod, and the end of the pressure rod away from the steel structure is located below the lifting platform.

[0013] Furthermore, each pulley bracket is provided with two pulleys, and both ends of the wire rope are connected to the blocking rod and the pressure rod after passing through the two pulleys respectively.

[0014] Furthermore, the first floor door is a steel grille door.

[0015] Furthermore, the lifting platform is externally connected to a hydraulic pump.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The mechanical interlocking device of the lifting platform of the present application includes a pulley, a wire rope, a pressure rod and a stop rod, wherein the pressure rod is hingedly connected to the lower part of the steel structure, and the stop rod is arranged at the upper part of the steel structure for moving up and down. One end of the wire rope is connected to the stop rod, and the other end is connected to the pressure rod after passing the wire rope. When the lifting platform descends to the bottom end of the first-floor door, the lifting platform gradually contacts the pressure rod, and the gradual downward movement of the lifting platform can drive the pressure rod to rotate downward. The pressure rod drives the stop rod to move upward in the slideway by pulling the wire rope to the top of the first-floor door or flush with the first-floor door. At this time, the stop rod releases the blocking effect on the first-floor door, and the first-floor door can be opened; when the lifting platform rises and gradually separates from the pressure rod, the pressure rod rotates upward under the pulling action of the wire rope, and drives the stop rod to move downward in the slideway through the wire rope to block the first-floor door, so that the first-floor door cannot be opened.

[0018] (2) The mechanical interlocking device of the lifting platform of the present application is provided with a slide, and the slide is made lower than the top of the first-floor door. After the lifting platform is separated from the pressure rod, the blocking rod is located at the bottom of the slide. At this time, the blocking rod can block the first-floor door. At the same time, the bottom of the slide supports the blocking rod, preventing the wire rope from being in a state of high tension for a long time, thereby extending the service life of the wire rope.

[0019] (3) The mechanical interlocking device of the lifting platform of the present application has a simple overall structure, reliable operation, and does not require maintenance during long-term use. In addition, accurate positioning and repeated reliable operation can be achieved through the hinged connection between the pressure rod and the steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the mechanical interlocking device for the lifting platform provided by the utility model;

[0022] Figure 2 This is a working principle diagram of the mechanical interlocking device for the lifting platform provided by the utility model;

[0023] Among them: 1- pit, 2- steel structure, 3- door frame, 4- first floor door, 5- lifting platform, 6- pulley bracket, 7- pulley, 8- slideway, 9- pressure rod, 10- stop rod, 11- wire rope. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The following is combined with Figure 1 To the attached Figure 2 And specific embodiments discuss the present invention in detail.

[0026] like Figure 1-2As shown, the utility model provides a mechanical interlocking device for a lifting platform, including a pit 1, two steel structures 2 are arranged at intervals in the pit 1, door frames 3 are fixed in front of the two steel structures 2, and a first-floor door 4 is installed on the door frame 3. The first-floor door 4 is used for the entry and exit of goods, and a lifting platform 5 is arranged in the door frame 3. The first-floor door 4 in this application is also the safety door for entry and exit of goods on the lowest floor, which can be understood as one floor of the elevator. When the first-floor door 4 is opened, goods can be put into the lifting platform 5 or goods can be taken out from the lifting platform 5, thereby realizing vertical transportation of goods; a pulley bracket 6 is fixed on the upper part of each steel structure 2, and the pulley bracket 6 is located at the first-floor door 4, a pulley 7 is provided on the pulley bracket 6, and a small slide 8 extending up and down is provided below the pulley bracket 6, and the bottom of the slide 8 is located below the first-floor door 4; the lower part of each steel structure 2 is hingedly connected to a pressure rod 9 at a position corresponding to the bottom end of the first-floor door 4, and the hinge point is located on the steel structure 2, and the pressure rod 9 can be rotated up or down around the hinge point by a certain angle. By setting a hinged installation position on the steel structure 2, not only does it not need to increase the installation position, but also the strength of the steel structure 2 can increase the firmness of the hinged connection. In addition, the hinged connection makes better use of reciprocating motion, is flexible and has no jamming; the pulley bracket 6, There are two groups of pulleys 7, slideways 8, pressure bars 9 and wire ropes 11, which correspond to the two steel structures 2 respectively. One end of each group of wire ropes 11 is connected to the upper end surface of the pressure bar 9 on the same side, and the other end is fixed to the blocking bar 10 after passing the pulley 7 on the same side. However, there is only one blocking bar 10 in the present application, and it is arranged horizontally. The blocking bar 10 extends from one side of the first-floor door 4 to the other side in the horizontal direction. The two slideways 8 are respectively located on both sides of the first-floor door 4 in the horizontal direction, and the two ends of the blocking bar 10 are synchronously slid in the slideways 8 on both sides; the first-floor door 4 in the present application can be optionally two doors, which are arranged on the left and right, and the two doors can be opened by rotating outwards respectively. When the lifting platform 5 descends to the bottom end of the first-floor door 4, the lifting platform 5 gradually contacts the pressure rod 9. The gradual downward movement of the lifting platform 5 can drive the pressure rod 9 to rotate downward. The pressure rod 9 drives the blocking rod 10 to move upward in the slideway 8 to the top of the first-floor door 4 or to be flush with the first-floor door 4 by pulling the wire rope 11. The blocking rod releases the blocking effect on the first-floor door 4. At this time, the first-floor door 4 can be opened; when the lifting platform 5 rises and gradually disengages from the pressure rod 9, the pressure rod 9 rotates upward under the pulling action of the wire rope 11, and drives the blocking rod 10 to move downward in the slideway 8 through the wire rope 11 to block the first-floor door 4, so that the first-floor door 4 cannot be opened.

[0027] The present application realizes the interlocking of the lifting platform 5 and the blocking rod 10 through the design of the blocking rod 10, the pressure rod 9, the wire rope 11 and the pulley 7. When the lifting platform 5 has not landed on the first floor, the first floor door 4 cannot be opened, which improves safety. The overall structure is simple to manufacture, reliable in operation and requires no maintenance. The hinged connection between the pressure rod 9 and the steel structure 2 can achieve accurate positioning and repeated reliable operation.

[0028] In the embodiment of the present application, the weight of the blocking rod 10 is greater than the weight of the two pressure rods 9. When the lifting platform 5 moves upward away from the pressure rods 9, the blocking rod 10 can be moved downward by relying on its own gravity, so that the blocking rod 10 blocks the first-floor door 4.

[0029] Specifically, in the embodiment of the present application, the pressure rod 9 is hingedly connected in the pit 1. When the lifting platform 5 is flush with the ground, the blocking rod 10 is located above the first-floor door 4. The lifting platform 5 is flush with the ground to facilitate the entry and exit of goods, and when the blocking rod 10 is located above the first-floor door 4, the first-floor door 4 can be opened.

[0030] In some embodiments, the slide 8 is located on the upper portion of the steel structure 2, and the bottom of the slide 8 is lower than the top of the first-floor door 4. After the lifting platform 5 is separated from the pressure rod 9, the blocking rod 10 is located at the bottom of the slide 8. It should be noted that the slide 8 in this application only needs to be designed for a short distance to ensure that when the blocking rod 10 moves to the bottom of the slide 8, the blocking rod 10 can block the first-floor door 4. At the same time, the bottom of the slide 8 supports the blocking rod 10, preventing the wire rope 11 from being under a high tension state for a long time, thereby extending the service life of the wire rope 11.

[0031] In some embodiments, after the lifting platform 5 disengages from the pressure rod 9, the pressure rod 9 is reset upward under the action of the blocking rod 10, and the end of the pressure rod 9 away from the steel structure 2 is located below the lifting platform 5. In other words, the present application limits the upward rotation angle of the pressure rod 9 through the setting of the slide 8, preventing the pressure rod 9 from rotating too much and entering the gap between the steel structure 2 and the first-floor door 4, thereby realizing repeated and reliable movement of the pressure rod 9.

[0032] In a preferred embodiment, each pulley bracket 6 is provided with two pulleys 7, and the two ends of the wire rope 11 are respectively passed around the two pulleys 7 and connected to the baffle rod 10 and the pressure rod 9; the pulley bracket 6 is a T-shaped bracket, the lower end of the T-shaped bracket is fixed on the steel structure 2, and the upper end of the T-shaped bracket is spaced apart with pulleys 7. The two spaced-apart pulleys 7 can respectively set the baffle rod 10 and the pressure rod 9 on both sides of the steel structure 2, providing sufficient lateral spacing distance for the installation of the baffle rod 10 and the pressure rod 9.

[0033] In the embodiment of the present application, the first-floor door is a steel grille door.

[0034] The working principle of the mechanical interlocking device of the lifting platform in this application is as follows:

[0035] The bottom of the slide 8 is slightly lower than the upper edge of the first-floor door 4, and the blocking rod 10 blocks the first-floor door 4 and cannot be opened. At the same time, the wire rope 11 drives the pressure rod 9 to reset under the guidance of the pulley 7, and so on.

[0036] The above further describes the present invention with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A mechanical interlocking device for a lifting platform, comprising a pit, characterized in that: Two steel structures are arranged in the pit at intervals, door frames are fixed in front of the two steel structures, first-floor doors are installed on the door frames, and lifting platforms are arranged in the door frames; A pulley bracket is fixed to the upper part of each of the steel structures, and the pulley bracket is located above the first-floor door, and a pulley is provided on the pulley bracket, and a slide extending up and down is provided below the pulley bracket; a pressure rod is hingedly connected to the position corresponding to the lower end of the first-floor door at the lower part of each of the steel structures; one end of the steel wire rope is connected to the upper end face of the pressure rod, and the other end is fixed to the barrier rod after passing around the pulley, and the barrier rod extends from one side of the first-floor door to the other side, and the two ends of the barrier rod are slidably arranged in the slides on both sides; When the lifting platform descends to the bottom end of the first-floor door, it contacts the pressure rod and drives the pressure rod to rotate downward, and the pressure rod drives the blocking rod to move upward to the top of the first-floor door through the wire rope; when the lifting platform rises and separates from the pressure rod, the pressure rod rotates upward and drives the blocking rod to move downward through the wire rope to block the first-floor door.

2. The mechanical interlocking device for a lifting platform according to claim 1, characterized in that: The weight of the blocking rod is greater than the weight of the two pressure rods.

3. The mechanical interlocking device for a lifting platform according to claim 1, characterized in that: The pressure rod is hingedly connected in the pit, and when the lifting platform is flush with the ground, the blocking rod is located above the first-floor door.

4. The mechanical interlocking device for a lifting platform according to claim 1, characterized in that: The slide is located at the upper part of the steel structure, and the bottom of the slide is lower than the upper end of the first floor door. After the lifting platform is separated from the pressure rod, the blocking rod is located at the bottom of the slide.

5. The mechanical interlocking device for a lifting platform according to claim 1, characterized in that: After the lifting platform is separated from the pressure rod, the pressure rod is reset upward under the action of the blocking rod, and the end of the pressure rod away from the steel structure is located below the lifting platform.

6. The mechanical interlocking device for a lifting platform according to claim 1, characterized in that: Each pulley bracket is provided with two pulleys, and the two ends of the steel wire rope are connected to the blocking rod and the pressure rod after passing through the two pulleys respectively.

7. The mechanical interlocking device for a lifting platform according to claim 1, characterized in that: The first floor door is a steel grille door.

8. The mechanical interlocking device for a lifting platform according to claim 1, characterized in that: The lifting platform is externally connected to a hydraulic pump.

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