Detection mechanism for lower channel of construction hoist

Abstract

A construction hoist lower channel detection mechanism comprises a cross rod arranged below a cage door frame and installation assemblies arranged at the two ends of the cross rod. The mounting assembly comprises a mounting seat, a travel switch which is arranged on the mounting seat and is matched with the cross rod, a guide rod which is movably connected with the mounting seat and can vertically and freely lift, and an upper guide wheel and a lower guide wheel which are pivoted on the mounting seat and are arranged up and down; the lower end of the guide rod is connected with the cross rod, and the upper guide wheel and the lower guide wheel correspond to a frame of the small door. When an obstacle appears in the running channel, the transverse rod is touched firstly, then the limiting switch is triggered, power is cut off and parking is conducted, and danger is avoided; the guide wheels can enable the small door to be stressed in a balanced mode, and the small door can slide up and down smoothly without clamping stagnation.

Description

TECHNICAL FIELD

[0001] The utility model relates to construction hoist technical field especially a construction hoist lower passage detection mechanism. BACKGROUND

[0002] The construction hoist cage runs up and down along the guide rail frame, and its running channel must be unobstructed. Personnel and goods enter the cage from the feeding door at the bottom of the landing, and after reaching the target floor of the building, they exit the cage from the discharging door and enter the target floor. A fence is usually arranged around the building to prevent materials such as steel pipes inside the building from extending into the running channel of the construction hoist cage. Ordinary construction hoists are not provided with protective devices and are only protected by the fence around the building, which poses a certain safety hazard. The discharging door of the construction hoist is usually a double-door, including a middle door at the upper part, a small door at the lower part, and a small flap door that flips outward. When the discharging door is opened, the small door runs downward, and the small flap door is pressed on the upper part of the small door from the inside. In addition to the gravity of the small door and the tension of the steel wire rope, the small door also has a lateral force from the small flap door, which causes the upper part of the small door to tilt outward and the lower part to tilt inward, resulting in one-way deflection and unsmooth running. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a construction hoist lower passage detection mechanism to provide safety and reliability for the operation of the construction hoist.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a construction hoist lower passage detection mechanism, which comprises a crossbar arranged below the door frame of the cage and mounting assemblies arranged at both ends of the crossbar. The mounting assemblies comprise a mounting seat, a travel switch arranged on the mounting seat and cooperating with the crossbar, a guide rod movably connected with the mounting seat and capable of vertically and freely rising and falling, and an upper guide wheel and a lower guide wheel pivotally connected with the mounting seat and arranged in an upper-lower manner. The lower end of the guide rod is connected with the crossbar, and the upper guide wheel and the lower guide wheel correspond to the frame of the small door. The principle of the utility model is as follows: when the construction hoist cage runs downward, if the crossbar contacts with an obstacle that intrudes into the running channel, the crossbar drives the guide rod to move upward. After the crossbar moves a certain distance, the crossbar touches the travel switch, the travel switch acts, the construction hoist is powered off, and the downward running is stopped, thereby avoiding the danger of collision between the cage and the obstacle. In addition, when the construction hoist cage is opened, the small door runs downward, the middle door runs upward, and the small flap door rotates outward from the inside. The upper guide wheel is directly opposite to the frame of the small door, so that the small door moves downward smoothly. The lower guide wheel is directly opposite to the frame of the small door, so that the lateral force outward, the lateral force of the small flap door, and the reaction force of the cage structure are counteracted, and the small door is in a state of force balance, which can smoothly slide up and down without jamming.

[0005] As improvement, the mounting base comprises a first mounting plate, a second mounting plate and a third mounting plate, the second mounting plate and the third mounting plate are connected with the first mounting plate respectively, the first mounting plate is connected with the cage, the upper guide wheel and the lower guide wheel are pivoted on the second mounting plate, the travel switch is fixed on the third mounting plate, the first mounting plate is provided with a limiting ring, and the upper end of the guide rod is connected with the limiting rod after penetrating through the limiting ring.

[0006] As improvement, the first mounting plate is provided with a first waist-shaped hole, the first mounting plate is fixed on the cage through bolts, the second mounting plate is provided with two second waist-shaped holes, and the inner rings of the upper guide wheel and the lower guide wheel are locked at the corresponding second waist-shaped holes through bolts.

[0007] As improvement, the guide rod is sleeved with a spring.

[0008] As improvement, the lower end of the guide rod is connected with the cross rod through a connecting plate, and the connecting plate and the cross rod are connected through a bolt.

[0009] The utility model discloses compared with prior art brings beneficial effect is:

[0010] When the obstacle appears in the operation channel, first touch the cross rod, then touch the travel switch, and stop the power and park, avoid the danger, when the construction hoist cage opens the door, the small door runs down, the middle door runs up, the small flap door rotates from inside to outside, the upper guide wheel is directly opposite the frame of the small door, and the small door moves down smoothly, the lower guide wheel is directly opposite the frame of the small door, and the small door is balanced under the lateral force of the small flap door and the counterforce of the cage structure, and can slide up and down smoothly without jamming. DRAWINGS

[0011] Figure 1 It is the front view of the cage.

[0012] Figure 2 It is the A enlarged view of Fig. Figure 1

[0013] Figure 3 It is the side view of the cage.

[0014] Figure 4 It is the B enlarged view of Fig. Figure 3

[0015] It is the schematic view of the detection mechanism. Figure 5 DETAILED DESCRIPTION The utility model will be further explained in connection with the drawings of the specification.

[0016] As

[0017] Figures 1 to 5 ​​The utility model discloses a construction hoist lower passage detection mechanism, including the crossbar 4 of being established below the door frame of cage 1 and the installation component 5 of being established at the both ends of crossbar 4. The installation component 5 includes the mounting seat, the travel switch 58 of being established on the mounting seat and with crossbar 4 cooperation, the guide rod 57 of being freely lifted vertically and being movably connected with the mounting seat and the upper guide wheel 54, lower guide wheel 55 of being pivoted on the mounting seat and being arranged up and down. The mounting seat includes the first mounting plate 51, the second mounting plate 52 and the third mounting plate 53, and the second mounting plate 52 and the third mounting plate 53 are respectively welded with the first mounting plate 51, the second mounting plate 52 is arranged vertically, and the third mounting plate 53 is in L type. The first mounting plate 51 is provided with the first waist type hole, and the first mounting plate 51 is fixed on the cage 1 through the bolt, and the position of the guide wheel is adjusted by adjusting the position of the first mounting plate 51. The upper guide wheel 54 and the lower guide wheel 55 are pivoted on the second mounting plate 52, and the second mounting plate 52 is provided with two second waist type holes. The inner ring of the upper guide wheel 54 and the lower guide wheel 55 is locked by the bolt at the corresponding second waist type hole, and the position of the guide wheel is adjustable, so that the upper guide wheel 54 and the lower guide wheel 55 correspond to the frame of the small door. The travel switch 58 is fixed on the third mounting plate 53, and when the crossbar 4 moves upward by a certain distance, the travel switch 58 is touched. The first mounting plate 51 is provided with a limiting ring, the upper end of the guide rod 57 is connected with the limiting rod after passing through the limiting ring, the limiting rod cannot pass through the limiting ring, and the limiting rod and the limiting ring cooperate to limit the lower limit position of the guide rod 57. The guide rod 57 can move upward under the action of the crossbar 4. The lower end of the guide rod 57 is connected with the crossbar 4. In the embodiment, the lower end of the guide rod 57 is connected with the crossbar 4 through the connecting plate, and the connecting plate and the crossbar 4 are connected through the latch, facilitating the disassembly and assembly of the crossbar 4. The guide rod 57 is sleeved with the spring 56, and when the crossbar 4 is not blocked by obstacles, the guide rod 57 moves downward under the action of its gravity and the spring force.

[0018] The utility model principle: when the construction hoist cage 1 runs downward, if the crossbar 4 contacts with the obstacle and is blocked, the crossbar 4 drives the guide rod 57 to move upward, and after the crossbar 4 moves upward by a certain distance, the crossbar 4 touches the travel switch 58, the travel switch acts, the construction hoist is powered off, and stops running downward, which avoids the danger of collision between the cage 1 and the obstacle. In addition, when the construction hoist cage 1 opens the door, the small door 3 runs downward, the middle door 2 runs upward, the small flap door 6 rotates from inside to outside, the upper guide wheel 54 is opposite to the frame of the small door 3, the small door 3 moves downward smoothly, the lower guide wheel 55 is opposite to the frame of the small door, and the lateral force of the small door 3, the lateral force of the small flap door 6 and the reaction force of the cage 1 structure are counteracted, so that the small door 3 is in force balance and can slide up and down smoothly without jamming.

Claims

1. A construction elevator lower passage detection mechanism characterized by: The installation assembly is arranged at both ends of the cross bar, and comprises a mounting base, a travel switch arranged on the mounting base and matched with the cross bar, a guide rod movably connected with the mounting base and vertically freely lifted and lowered, and an upper guide wheel and a lower guide wheel which are pivotally connected with the mounting base and arranged in an up-down mode; the lower end of the guide rod is connected with the cross bar, and the upper guide wheel and the lower guide wheel correspond to the frame of the small door.

2. The construction elevator lower passageway detection mechanism of claim 1, wherein: The mounting base comprises a first mounting plate, a second mounting plate and a third mounting plate, the second mounting plate and the third mounting plate are respectively connected with the first mounting plate, the first mounting plate is connected with the cage, the upper guide wheel and the lower guide wheel are pivotally connected with the second mounting plate, the travel switch is fixed on the third mounting plate, and a limiting ring is arranged on the first mounting plate, and the upper end of the guide rod is connected with a limiting rod after passing through the limiting ring.

3. The construction elevator lower passageway detection mechanism of claim 2, wherein: A first waist-shaped hole is arranged on the first mounting plate, the first mounting plate is fixed on the cage through bolts, two second waist-shaped holes are arranged on the second mounting plate, and the inner rings of the upper guide wheel and the lower guide wheel are locked in the corresponding second waist-shaped holes through bolts.

4. The construction elevator lower passageway detection mechanism of claim 1, wherein: A spring is sleeved on the guide rod.

5. The construction elevator lower passageway detection mechanism of claim 1, wherein: The lower end of the guide rod is connected with the cross bar through a connecting plate, and the connecting plate is connected with the cross bar through a bolt.

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