A multifunctional ladder for construction

Abstract

The present invention discloses a multifunctional ladder for construction, and relates to the technical field of construction tools. It includes a fixed ladder frame and a sliding ladder frame; the fixed ladder frame includes a left column, a right column and a fixed pedal; a heavy object lifting device is slidably arranged between the left column and the right column; a plurality of hinged ears are arranged on the front of the left column, and a movable pedal is hingedly arranged on the hinged ears; a plurality of latch seats are arranged on the front of the right column; the free end of the movable pedal is inserted in the latch seat; a winch is arranged on the right column; the sliding ladder frame includes a left leg, a right leg and a support beam; the left leg and the right leg are respectively slidably inserted in the left column and the right column, and a lifting device is fixedly arranged on the support beam; the top of the lifting device is connected to the fixed pedal of the lowest layer. The present invention can not only enable workers to climb high, but also enable heavy objects to be lifted, and has dual functions; it is simple to operate and easy to carry; and the heavy object lifting device has an anti-falling function, which improves the safety of the operation.

Description

Technical Field

[0001] The invention relates to the technical field of construction tools, in particular to a multifunctional ladder for building construction. Background Art

[0002] As a tool, ladders have appeared in the early times. In modern times, they have gradually evolved into many different forms and uses. There are outdoor, indoor, fixed, mobile, civil, engineering, military, commercial, etc. With the development of human civilization and the prosperity of material, ladders have entered thousands of households. With the widespread use of ladders, the development and use of multifunctional ladders for different industries has become a major trend.

[0003] In the field of construction, ladders are frequently used. However, existing ladders have a single function and can only enable workers to climb up, but cannot lift heavy objects. If heavy objects are to be installed, other equipment is needed. For example, when installing heavy objects such as fire sprinkler pipes, cable boxes, and HVAC pipes in the air, it is necessary to use lifting equipment to lift them, and then the workers use the ladder to climb up to install the hanging bracket, which is time-consuming and labor-intensive, and the lifting equipment is inconvenient to carry. Therefore, we propose a multifunctional ladder for construction. Summary of the invention

[0004] The main purpose of the present invention is to provide a multifunctional ladder for construction to solve the above problems.

[0005] To achieve the above-mentioned purpose, the present invention provides a multifunctional ladder for construction, comprising a fixed ladder frame and a sliding ladder frame; the fixed ladder frame comprises a left column and a right column and a fixed pedal fixedly arranged between the left column and the right column; the fixed pedal is at least one and is located below the fixed ladder frame; the left column and the right column are both hollow structures; the tops of the left column and the right column are both provided with a fine-tuning structure; a weight lifting device is slidably arranged between the left column and the right column; the weight lifting device is located above the fixed pedal; a plurality of hinges are evenly arranged longitudinally on the front of the left column An ear is hingedly provided with a movable pedal; a plurality of latch seats are evenly arranged longitudinally on the front of the right column; the free end of the movable pedal is inserted in the latch seat and connected by a latch; a winch for controlling a heavy object lifting device is arranged on the side of the right column away from the left column; the sliding ladder frame includes a left leg, a right leg and a support beam arranged between the left leg and the right leg; the left leg and the right leg are respectively slidably inserted in the left column and the right column, and a lifting device is fixedly arranged on the support beam; the top of the lifting device is connected to the fixed pedal of the lowest layer.

[0006] Furthermore, the lifting device is a jack or a hydraulic cylinder.

[0007] Furthermore, the right column and the fine-tuning structure on the right column are both provided with scale lines.

[0008] Furthermore, the capstan is driven by manual rotation or by a motor; when the capstan is driven by manual rotation, a ratchet mechanism for limiting locking is provided on the capstan.

[0009] Furthermore, it also includes a steel wire rope; T-shaped slide grooves are symmetrically provided on the opposite sides of the left column and the right column; the heavy object lifting device includes an I-shaped sliding support plate; both ends of the I-shaped sliding support plate are respectively slidably inserted into the T-shaped slide grooves on the left column and the right column; both ends of the I-shaped sliding support plate are provided with a clearance groove for the steel wire rope to pass through; two driven pulleys are symmetrically provided at the bottom of the I-shaped sliding support plate; a pulley groove is provided on the side of the right column away from the left column, and a supporting pulley is provided in the pulley groove; one end of the steel wire rope is fixedly connected to the top end of the left column, and the other end passes around the two driven pulleys and the supporting pulley in sequence and is connected to the winch.

[0010] Furthermore, the left and right columns are symmetrically provided with a plurality of slots evenly arranged in the longitudinal direction on the opposite sides; the slots are connected to the T-shaped slide slot; two rod slots are symmetrically provided on one side of the I-shaped sliding support plate, and one end of the rod slot passes through the end of the I-shaped sliding support plate; an insertion rod is slidably arranged in the insertion rod slot; a push plate slot is provided below the two insertion rod slots; a push plate is slidably arranged in the push plate slot; first inclined surfaces are symmetrically arranged at both ends of the top of the push plate; a second inclined surface is provided at one end of the insertion rod to slide in cooperation with the first inclined surface; a spring is provided in the insertion rod slot; one end of the spring is connected to one end of the insertion rod slot away from the end of the I-shaped sliding support plate, and the other end is connected to one end of the insertion rod provided with the second inclined surface; a trigger pulley is provided at the bottom of the push plate ; The trigger pulley is arranged between the two driven pulleys, and the height of the trigger pulley is lower than the height of the driven pulley; the trigger pulley abuts against the wire rope; the I-shaped sliding support plate is provided with a cover plate installed on one side of the plug rod groove; under normal conditions, due to the action of gravity, the wire rope drives the trigger pulley to move upward, and then the push plate slides along the push plate groove to the highest point. At this time, the first inclined surface drives the second inclined surface to slide, so that the plug rod moves along the plug rod groove toward the center of the I-shaped sliding support plate, so that the plug rod is retracted into the I-shaped sliding support plate, and the I-shaped sliding support plate can slide along the T-shaped slide groove; when the wire rope is suddenly disconnected, since the trigger pulley loses the supporting force of the wire rope, the spring plays a leading role, pushing the plug rod out of the end of the I-shaped sliding support plate so that it is inserted into the slot.

[0011] Furthermore, fixed support legs are symmetrically hingedly arranged on the front and rear sides of the fixed ladder frame; and rollers are installed on the free ends of the fixed support legs.

[0012] Furthermore, a support plate is provided on the side of the left column away from the right column; the support plate is connected to a screw rod through a bearing; a turntable is provided on the top of the screw rod; a nut is threaded on the screw rod; connecting rods are hinged at both ends of the nut; the free ends of the two connecting rods are respectively hinged to the two fixed support legs.

[0013] The present invention has the following beneficial effects:

[0014] The present invention can not only enable workers to climb to heights, but also enable heavy objects to be lifted, thus having dual functions; the operation is simple and the device is convenient to carry; and the heavy object lifting device has an anti-falling function, thus improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic overall diagram of a multifunctional ladder for building construction.

[0016] Figure 2 This is a schematic diagram from another angle of a multifunctional ladder for construction according to the present invention.

[0017] Figure 3 For the present invention Figure 2 Enlarged view of point A.

[0018] Figure 4 The present invention is a schematic diagram of a heavy object lifting device of a multifunctional ladder for construction.

[0019] Among them, 1-left column; 2-fixed pedal; 3-right column; 4-support beam; 5-left leg; 6-right leg; 7-lifting device; 8-fine-tuning structure; 9-heavy lifting device; 10-fixed support leg; 11-hinged ear; 12-movable pedal; 13-T-shaped slide; 14-turntable; 15-support plate; 16-screw; 17-nut; 18-connecting rod; 31-support pulley; 32-slot; 33-pin seat; 3 4-wire rope; 35-capstan; 36-ratchet mechanism; 37-latch pin; 38-scale line; 81-screw; 82-stud; 91-cover plate; 92-I-shaped sliding support plate; 93-insertion rod; 94-push plate; 95-spring; 101-roller; 921-insertion rod slot; 922-push plate slot; 923-gap slot; 924-driven pulley; 931-second inclined plane; 941-first inclined plane; 942-trigger pulley. DETAILED DESCRIPTION

[0020] In order to achieve the above-mentioned purpose and effect, the technical means and structures adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention.

[0021] like Figure 1-4As shown, the present invention provides a multifunctional ladder for construction, including a fixed ladder frame and a sliding ladder frame; the fixed ladder frame includes a left column 1 and a right column 3 and a fixed pedal 2 fixedly arranged between the left column 1 and the right column 3; the fixed pedal 2 is at least one and is located below the fixed ladder frame, and in this embodiment, two are preferably provided; the left column 1 and the right column 3 are both hollow structures; the tops of the left column 1 and the right column 3 are both provided with a fine-tuning structure 8; a weight lifting device 9 is slidably arranged between the left column 1 and the right column 3; the weight lifting device 9 is located above the fixed pedal 2; a plurality of hinged ears 11 are evenly and longitudinally arranged on the front of the left column 1, A movable pedal 12 is hingedly provided on the hinged ear 11; a plurality of latch seats 33 are evenly arranged longitudinally on the front of the right column 3; the free end of the movable pedal 12 is inserted into the latch seat 33 and is connected by a latch 37; a winch 35 for controlling a heavy object lifting device 9 is provided on the side of the right column 3 away from the left column 1; the sliding ladder frame includes a left leg 5, a right leg 6 and a support beam 4 arranged between the left leg 5 and the right leg 6; the left leg 5 and the right leg 6 are respectively slidably inserted into the left column 1 and the right column 3, and a lifting device 7 is fixedly provided on the support beam 4; the top end of the lifting device 7 is connected to the fixed pedal 2 of the lowest layer.

[0022] When it is used only for climbing, all the movable pedals 12 are inserted into the latch seat 33 and fixed with the latch 37 to form a ladder for climbing. When it is necessary to lift heavy objects, the ladder is first placed vertically, the lifting device 7 is started, the sliding ladder frame is extended, and the fine-adjustment structure 8 on the fixed ladder frame is supported against the roof, and then the fine-adjustment structure 8 is adjusted to completely fix the ladder between the bottom plate and the roof, and then all the movable pedals 12 are opened to make room for the heavy object lifting device 9, and the heavy object is placed on the heavy object lifting device 9, and the winch 35 is started to drive the heavy object lifting device 9 to lift. When installing long heavy objects such as fire sprinkler pipes, cable boxes, HVAC pipes, etc., multiple ladders can be used in combination.

[0023] In another embodiment, the lifting device 7 is a jack or a hydraulic cylinder, and in this embodiment, it is a jack.

[0024] In another embodiment, the right column 3 and the fine-tuning structure 8 on the right column 3 are both provided with scale lines 38 to facilitate checking the position when adjusting the height.

[0025] In another embodiment, the fine-tuning structure 8 comprises a stud 82 and a screw sleeve 81 screwed onto the stud 82. The screw sleeve 81 is rotated to perform height fine-tuning.

[0026] In another embodiment, the capstan 35 is driven by manual rotation or by a motor; when the capstan 35 is driven by manual rotation, a ratchet mechanism 36 for limiting locking is provided on the capstan 35 .

[0027] In another embodiment, it also includes a steel wire rope 34; T-shaped slide grooves 13 are symmetrically provided on the opposite sides of the left column 1 and the right column 3; the heavy object lifting device 9 includes an I-shaped sliding support plate 92; both ends of the I-shaped sliding support plate 92 are slidably inserted into the T-shaped slide grooves 13 on the left column 1 and the right column 3 respectively; both ends of the I-shaped sliding support plate 92 are provided with a clearance groove 923 for the steel wire rope 34 to pass through; two driven pulleys 924 are symmetrically provided at the bottom of the I-shaped sliding support plate 92; a pulley groove is provided on the side of the right column 3 away from the left column 1, and a supporting pulley 31 is provided in the pulley groove; one end of the steel wire rope 34 is fixedly connected to the top of the left column 1, and the other end passes around the two driven pulleys 924 and the supporting pulley 31 in turn and is connected to the winch 35.

[0028] In another embodiment, the left column 1 and the right column 3 are symmetrically provided with a plurality of slots 32 uniformly arranged longitudinally on opposite sides; the slots 32 are connected to the T-shaped slide groove 13; two rod insertion grooves 921 are symmetrically provided on one side of the I-shaped sliding support plate 92, and one end of the rod insertion groove 921 passes through the end of the I-shaped sliding support plate 92; a rod 93 is slidably provided in the rod insertion groove 921; a push plate groove 922 is provided below the two rod insertion grooves 921; a push plate groove 922 is slidably provided in the push plate groove 922 A push plate 94 is provided; first inclined surfaces 941 are symmetrically provided at both ends of the top of the push plate 94; a second inclined surface 931 that slides with the first inclined surface 941 is provided at one end of the insertion rod 93; a spring 95 is provided in the insertion rod groove 921; one end of the spring 95 is connected to one end of the insertion rod groove 921 away from the end of the I-shaped sliding support plate 92, and the other end is connected to one end of the insertion rod 93 provided with the second inclined surface 931; a trigger pulley 942 is provided at the bottom of the push plate 94; the trigger pulley 942 The pulley 942 is arranged between the two driven pulleys 924, and the height of the trigger pulley 942 is lower than that of the driven pulley 924; the trigger pulley 942 abuts against the steel wire rope 34; the I-shaped sliding support plate 92 is provided with a cover plate 91 on one side of the rod insertion groove 921; under normal conditions, due to the action of gravity, the steel wire rope 34 drives the trigger pulley 942 to move upward, thereby causing the push plate 94 to slide along the push plate groove 922 to the highest point, at which time the first inclined surface 941 drives the second inclined surface 941 to move upward. The two inclined surfaces 931 slide, causing the insertion rod 93 to move along the insertion rod groove 921 toward the center of the I-shaped sliding support plate 92, so that the insertion rod 93 is retracted into the I-shaped sliding support plate 92, and the I-shaped sliding support plate 92 can slide along the T-shaped slide groove 13; when the wire rope 34 is suddenly disconnected, the trigger pulley 942 loses the supporting force of the wire rope 34, and the spring 95 plays a leading role, pushing the insertion rod 93 out of the end of the I-shaped sliding support plate 92, so that it is inserted into the slot 32, preventing the heavy object lifting device 9 from falling.

[0029] In another embodiment, fixed support legs 10 are symmetrically hingedly provided on the front and rear sides of the fixed ladder frame to stabilize the ladder; and rollers 101 are installed at the free ends of the fixed support legs 10 to facilitate movement and transportation.

[0030] In another embodiment, a support plate 15 is provided on the side of the left column 1 away from the right column 3; the support plate 15 is connected to a screw rod 16 through a bearing; a turntable 14 is provided on the top of the screw rod 16; a nut 17 is screwed on the screw rod 16; connecting rods 18 are hinged at both ends of the nut 17; the free ends of the two connecting rods 18 are respectively hinged to the two fixed support legs 10. By rotating the turntable 14, the divergence angle between the two fixed support legs 10 can be adjusted.

[0031] The above descriptions are only preferred embodiments of the present invention, not all embodiments. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, belong to the protection scope of the present invention.

Claims

1. A multifunctional ladder for construction, characterized in that: It comprises a fixed ladder frame and a sliding ladder frame; the fixed ladder frame comprises a left column and a right column and a fixed pedal fixedly arranged between the left column and the right column; the fixed pedal is at least one and is located below the fixed ladder frame; the left column and the right column are both hollow structures; the tops of the left column and the right column are both provided with a fine-tuning structure; a weight lifting device is slidably arranged between the left column and the right column; the weight lifting device is located above the fixed pedal; a plurality of hinged ears are evenly arranged longitudinally on the front of the left column, and a hinged ear is hingedly arranged There is a movable pedal; a plurality of latch seats are evenly arranged on the front of the right column in the longitudinal direction; the free end of the movable pedal is inserted into the latch seat and connected by a latch; a winch for controlling a heavy object lifting device is arranged on the side of the right column away from the left column; the sliding ladder frame includes a left leg, a right leg and a support beam arranged between the left leg and the right leg; the left leg and the right leg are respectively slidably inserted in the left column and the right column, and a lifting device is fixedly arranged on the support beam; the top of the lifting device is connected to the fixed pedal of the lowest layer; The lifting device is a jack or a hydraulic cylinder; It also includes a steel wire rope; T-shaped slide grooves are symmetrically provided on the opposite sides of the left column and the right column; the heavy object lifting device includes an I-shaped sliding support plate; the two ends of the I-shaped sliding support plate are respectively slidably inserted into the T-shaped slide grooves on the left column and the right column; both ends of the I-shaped sliding support plate are provided with a clearance groove for the steel wire rope to pass through; two driven pulleys are symmetrically provided at the bottom of the I-shaped sliding support plate; a pulley groove is provided on the side of the right column away from the left column, and a supporting pulley is provided in the pulley groove; one end of the steel wire rope is fixedly connected to the top of the left column, and the other end passes through the two driven pulleys and the supporting pulley in sequence and is connected to the winch; The left and right columns are symmetrically provided with a plurality of longitudinally uniformly arranged slots on the opposite sides of the left column and the right column; the slots are connected to the T-shaped slide groove; one side of the I-shaped sliding support plate is symmetrically provided with two insertion rod slots, one end of the insertion rod slot passes through the end of the I-shaped sliding support plate; an insertion rod is slidably arranged in the insertion rod slot; a push plate slot is provided below the two insertion rod slots; a push plate is slidably arranged in the push plate slot; two ends of the top of the push plate are symmetrically provided with a first inclined surface; one end of the insertion rod is provided with a second inclined surface that cooperates with the first inclined surface to slide; a spring is provided in the insertion rod slot; one end of the spring is connected to one end of the insertion rod slot away from the end of the I-shaped sliding support plate, and the other end is connected to one end of the insertion rod provided with the second inclined surface; a trigger pulley is provided at the bottom of the push plate; the trigger pulley is arranged between the two driven pulleys, and the height of the trigger pulley is lower than the height of the driven pulley; the trigger pulley abuts against the wire rope; a cover plate is installed on one side of the I-shaped sliding support plate provided with the insertion rod slot 2. A multifunctional ladder for construction as claimed in claim 1, characterized in that: The right column and the fine-tuning structure on the right column are both provided with scale lines.

3. A multifunctional ladder for construction as claimed in claim 1, characterized in that: The capstan is driven by manual rotation or by a motor; when the capstan is driven by manual rotation, a ratchet mechanism for limiting locking is provided on the capstan.

4. A multifunctional ladder for construction as claimed in claim 1, characterized in that: Under normal conditions, due to the action of gravity, the wire rope drives the trigger pulley to move upward, thereby causing the push plate to slide along the push plate groove to the highest point. At this time, the first inclined surface drives the second inclined surface to slide, causing the insertion rod to move along the insertion rod groove toward the center of the I-shaped sliding support plate, so that the insertion rod is retracted into the I-shaped sliding support plate, and the I-shaped sliding support plate slides along the T-shaped groove; when the wire rope is suddenly disconnected, since the trigger pulley loses the supporting force of the wire rope, the spring plays a leading role, pushing the insertion rod out of the end of the I-shaped sliding support plate so that it is inserted into the slot.

5. A multifunctional ladder for construction as claimed in claim 1, characterized in that: The fixed ladder frame is symmetrically hinged with fixed support legs at the front and rear sides; and rollers are installed at the free ends of the fixed support legs.

6. A multifunctional ladder for construction as claimed in claim 5, characterized in that: A support plate is arranged on the side of the left column away from the right column; the support plate is connected to a screw rod through a bearing; a turntable is arranged on the top of the screw rod; a nut is threaded on the screw rod; connecting rods are hinged at both ends of the nut; the free ends of the two connecting rods are respectively hinged to the two fixed support legs.

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