Device and method for testing pulling force of hand-pulling or lever block on construction site

Abstract

The invention discloses a device and a method for testing the pulling force of a hand-pulling or lever block on a construction site, solves the problems that the pulling force testing device in the prior art is not suitable for the construction site and the testing efficiency is low, and has the beneficial effects that the pulling force testing device can be stably supported and the testing efficiency is improved. According to the specific scheme, the hand-pulling or lever block tension test device on the construction site comprises a counter-force supporting piece, the counter-force supporting piece is fixed to the ground through a supporting component, a test platform makes contact with the ground and is arranged in a hollow mode, and a first connecting piece and a second connecting piece are arranged on the two opposite sides of the hollow position of the test platform respectively; the first connecting piece is connected with the connecting lug plate, the connecting lug plate can be detachably connected with the multiple to-be-tested hoists respectively, the to-be-tested hoists are detachably connected with the second connecting piece, the dynamometer is arranged between the to-be-tested hoists and the second connecting piece, and the test platform is transversely arranged between the counter-force supporting pieces. The counter-force supporting piece is attached to the test platform so that counter-force can be provided for the test platform through the counter-force supporting piece.

Description

Technical Field

[0001] The invention relates to the technical field of hand chain hoist tension test, in particular to a construction site hand pull or lever hoist tension test device and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] During the engineering installation process, the failure of lifting rigging poses a great challenge to construction safety. The hand chain hoist tensile test is an effective method to verify its lifting capacity. When conducting tensile tests at construction sites such as building sites and bridge construction sites, it is often impossible to implement due to the lack of testing tools and equipment, which brings inconvenience to the work.

[0004] In the existing hand chain hoist test, the hand chain hoist is usually set vertically. For example, Chinese patent application CN201520563146.7 discloses a hand chain hoist test stand, in which the hand chain hoist is set vertically. When the hand chain hoist set vertically is replaced with the next hand chain hoist after the test is completed, the disassembly and installation of the hand chain hoist require the operator to stand at a high place, resulting in low work efficiency. There are many hand chain hoists that need to be tested on the construction site, which has a certain impact on the work progress.

[0005] In addition, there are some test devices, which provide reaction force through the ground. This is suitable for relatively stable ground. However, the ground of many construction sites is loose soil. If the device is directly fixed in this kind of soil, it will be unstable, which will directly affect the test results. Moreover, it can only test one lever hoist at a time, so the test effect is still low.

[0006] In summary, the testing device in the prior art cannot be applied to the complex environment of the construction site, and can only test one hand chain hoist or hand lever hoist at a time, resulting in low testing efficiency. Summary of the invention

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a construction site hand-pull or hand-lever hoist tension test device, which is easy to transport, easy to operate and use, and has accurate test results, and can effectively improve the safety of the use of lifting rigging on the construction site.

[0008] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0009] A construction site hand-pulled or hand-lever hoist tension test device comprises a reaction force support member, which is fixed to the ground through a supporting member, a test platform in contact with the ground, and the test platform is hollow. A first connecting member and a second connecting member are respectively arranged on opposite sides of the hollow part of the test platform, the first connecting member is connected to a connecting ear plate, and the connecting ear plate can be detachably connected to a plurality of hoists to be tested, respectively, the hoists to be tested are detachably connected to the second connecting member, a dynamometer is arranged between the hoists to be tested and the second connecting member, the test platform is transversely arranged between the reaction force support members, the reaction force support members are fitted to the test platform to provide a reaction force to the test platform through the reaction force support members, and the hoist to be tested is operated to observe the numerical display of the dynamometer to perform a tension test of the hand-pulled hoist or hand-lever hoist.

[0010] In the tension test device as described above, the reaction support is fixed to the ground by a supporting member, and the test platform can be placed between the reaction support members. In this way, when the hoist to be tested is tested through the test platform, the reaction support provides a reaction force to ensure the smooth progress of the test. The test platform does not need to be placed vertically, and the test can be carried out in a horizontal state. The overall stability is stronger, and the horizontal state is also convenient for replacing the hoist to be tested, thereby improving the test efficiency of a large number of hand hoists at the construction site.

[0011] In a construction site hand-pulled or lever hoist tension test device as described above, the reaction force support member includes a first limit plate and a second limit plate, the first limit plate is fixed to the support member, the second limit plate is arranged opposite to the first limit plate, and the position of the second limit plate relative to the support member is movable, the test platform is limited from both sides of the test platform by the first limit plate and the second limit plate, and a stable reaction force is provided to the test platform during the tension test.

[0012] A construction site hand-pulled or lever hoist tension test device as described above, wherein the support member comprises a first member and a second member;

[0013] The first limiting plate is L-shaped, one side of which is connected to a first component fixed to the ground; the second limiting plate is L-shaped, one side of which is connected to a second component fixed to the ground.

[0014] As described above, a construction site hand-pull or lever hoist tension test device, a guide rail is arranged on the surface of the second component, the vertical side of the second limit plate extends beyond the guide rail close to one end of the first component, the second limit plate is provided with a slider, the slider can move along the guide rail, the second limit plate and the second component surface are respectively provided with long holes, fasteners pass through the long holes to realize the connection between the second limit plate and the second component, and after the test platform is placed between the first limit plate and the second limit plate, the position of the second limit plate can be adjusted to ensure that the limit plates on both sides clamp the test platform.

[0015] In the construction site hand-pulled or lever winch tensile test device as described above, the first component is a first concrete component, the second component is a second concrete component, the upper surfaces of the first component and the second component are respectively flush with the ground, and the first component and the second component are set at a distance.

[0016] In the construction site hand-pulled or lever hoist tension test device as described above, the test platform comprises a frame, the first connecting member and the second connecting member are arranged inside the frame, the first connecting member is a first lifting ear, and the second connecting member is a second lifting ear.

[0017] In the above-mentioned construction site hand-pulled or lever hoist tension test device, the first connecting member is connected to the first steel wire rope through the first lifting shackle, and the first steel wire rope is connected to the connecting ear plate;

[0018] The second connecting member is connected to the second steel wire rope through a second lifting shackle, and the second steel wire rope is connected to the hoist to be tested.

[0019] As described above, a construction site hand-pulled or hand-lever hoist tension test device, the connecting ear plate is triangular in shape, and the connecting ear plate includes a first body connected to the hoist to be tested (hand-pulled hoist to be tested or hand-lever hoist to be tested), the first body is provided with a plurality of first openings, the first openings are connected to the hoist to be tested through a sling, the first body is fan-shaped, the upper side of the first body is connected to the second body, second bodies are provided on both sides of the first body, the second body is provided with a second opening, the second opening is connected to the first connecting piece, and the setting of a plurality of first openings can simultaneously realize the testing of a plurality of hand-pulled hoists or hand-lever hoists.

[0020] As described above, in a construction site hand-pulled or lever hoist tension test device, one end of the second body away from the first body is bent outward, and the bent second body presses the first steel wire rope outward to ensure the distance between the two sides of the first steel wire rope, and multiple reinforcing ribs are arranged between the first body and the second body to enhance the connection strength between the first body and the second body.

[0021] In a second aspect, the present invention further provides a method for testing the tension of a hand chain hoist at a construction site, using the above-mentioned construction site hand or lever hoist tension testing device, comprising the following contents:

[0022] Fix the reaction support on the ground;

[0023] A first connecting member and a second connecting member are respectively arranged on opposite sides of the hollow part of the test platform, the first connecting member is connected to a connecting ear plate, the connecting ear plate can be detachably connected to a plurality of hoists to be tested, the hoists to be tested are detachably connected to the second connecting member, and a dynamometer is arranged between the hoists to be tested and the second connecting member;

[0024] The test platform is laterally arranged between the reaction force supports to provide a reaction force to the test platform through the reaction force supports;

[0025] Operate the hoist to be tested and observe the numerical display of the dynamometer to conduct a tensile test on the chain hoist or lever hoist.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1) The tension test device provided by the present invention has a simple overall structure, and can be used to test multiple hand chain hoists or hand lever hoists at the same time on site, with high test efficiency. In addition, the reaction force support is supported by a support member fixed to the ground, and the reaction force support provides a reaction force to the test platform, which not only ensures the stability of the overall structure, but also makes the overall structure suitable for construction sites with more complex sites and softer ground, which is beneficial to ensuring the accuracy of the test results; and the horizontally placed tension test device is convenient for replacement after the test is completed and the rapid installation of the next hand chain hoist or hand lever hoist, thereby improving the test efficiency on site.

[0028] 2) The overall structure of the device of the present invention is simple, and the materials used are commonly used materials on site, which are easy to process and manufacture, and the manufacturing cost is low.

[0029] 3) In the present invention, the test is carried out in the hollow part of the test platform, and the working range of the gourd to be tested is effectively limited by the test platform, and the stable setting of the first connecting member and the second connecting member can also be guaranteed, which is beneficial to ensure the accuracy of the test results; the reaction force support member includes a first limit plate and a second limit plate, the first limit plate is fixed to the first component, and the second limit plate is fixed to the second component, and the position of the second limit plate is adjustable to ensure that the first limit plate and the second limit plate stably clamp the test platform.

[0030] 4) The connecting ear plate structure of the present invention is reasonably arranged. The upper side of the connecting ear plate is connected to the first connecting member through the second opening. A plurality of first openings are arranged on the lower side of the connecting ear plate. Each first opening is used to connect the connecting ear plate to the corresponding hoist to be tested. The connecting ear plate includes a first body and a second body, which is convenient for processing on the construction site and effectively controls costs. The first steel wire rope is guided by the second body to avoid entanglement of the first steel wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] Figure 1 It is a schematic diagram of the internal structure of a test platform in a construction site hand-pull or hand-lever hoist tension test device according to one or more embodiments of the present invention.

[0033] Figure 2 It is a schematic diagram of the cooperation between a test platform and a reaction force support member in a construction site hand-pull or hand-lever hoist tension test device according to one or more embodiments of the present invention.

[0034] Figure 3 It is a schematic diagram of a test platform in a construction site hand-pulled or lever hoist tension test device according to one or more embodiments of the present invention.

[0035] Figure 4 It is a front view of a test platform in a construction site hand-pulled or lever hoist tension test device according to one or more embodiments of the present invention.

[0036] Figure 5 It is a front view of a connecting ear plate in a construction site hand-pull or lever hoist tension test device according to one or more embodiments of the present invention.

[0037] Figure 6 It is a side view of a connecting ear plate in a construction site hand-pulled or lever hoist tension test device according to one or more embodiments of the present invention.

[0038] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0039] Wherein: 1. first lifting shackle, 2. first steel wire rope, 3. connecting lug, 4. lifting strap, 5. hoist to be tested, 6. test platform, 7. dynamometer, 8. reaction force support, 9. second lifting shackle, 10. second steel wire rope;

[0040] 3-1. First opening, 3-2. Reinforcement rib plate, 3-3. Second opening, 3-4. First body, 3-5. Second body;

[0041] 6-1. First connecting member, 6-2. Frame, 6-3. Second connecting member;

[0042] 8-1. First limiting plate, 8-2. Second limiting plate, 8-3. Guide rail, 8-4. First component, 8-5. Second component. DETAILED DESCRIPTION

[0043] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0045] As introduced in the background technology, the on-site testing of hand-pulled or lever hoists in the prior art has the problems of poor fixation and low testing efficiency. In order to solve the above technical problems, the present invention proposes a construction site hand-pulled or lever hoist tension test device.

[0046] Embodiment 1

[0047] In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, a construction site hand-pulled or hand-lever hoist tension test device comprises a reaction support 8, which is fixed to the ground through a supporting member, a test platform 6 in contact with the ground, and the test platform 6 is hollow. A first connecting member 6-1 and a second connecting member 6-3 are respectively arranged on opposite sides of the hollow part of the test platform 6, the first connecting member 6-1 is connected to a connecting ear plate 3, and the connecting ear plate 3 can be detachably connected to a plurality of hoists 5 to be tested, respectively, the hoists 5 to be tested are detachably connected to the second connecting member 6-3, a dynamometer 7 is arranged between the hoists 5 to be tested and the second connecting member 6-3, the test platform 6 is transversely arranged between the reaction support 8, the reaction support 8 is fitted with the test platform 6 to provide a reaction force to the test platform 6 through the reaction support 8, and the hoist to be tested is operated to observe the numerical display of the dynamometer 7 to perform a tension test of the hand-pulled hoist or hand-lever hoist.

[0048] refer to Figure 2 As shown, the reaction support 8 includes a first limit plate 8-1 and a second limit plate 8-2. The first limit plate 8-1 is fixed to the supporting member, and the second limit plate 8-2 is arranged opposite to the first limit plate 8-1. The second limit plate 8-2 is movable relative to the supporting member. The test platform 6 is limited from both sides of the test platform 6 by the first limit plate 8-1 and the second limit plate 8-2, so as to provide a stable reaction force to the test platform + during the tensile test.

[0049] In this embodiment, the supporting member includes a first member 8-4 and a second member 8-5; the first limiting plate 8-1 is L-shaped, and one side of the first limiting plate 8-1 is connected to the first member 8-4 fixed to the ground; the second limiting plate 8-2 is L-shaped, and one side of the second limiting plate 8-2 is connected to the second member 8-5 fixed to the ground; the first limiting plate 8-1 and the second limiting plate 8-2 can be rigid plates, and the vertical sides of the first limiting plate and the second limiting plate are both higher than the test platform 6.

[0050] It is easy to understand that a guide rail 8-3 is set on the surface of the second component 8-5, and two guide rails 8-3 can be set. The vertical side of the second limit plate 8-2 exceeds the end of the guide rail 8-3 close to the first component 8-4 to prevent the guide rail from contacting the test platform 6. The test platform 6 is stably supported by the first component 8-4, the ground and the surface of the second component 8-5. A slider is set on the second limit plate 8-2, and the slider can move along the guide rail 8-3. Long holes are respectively set on the surfaces of the second limit plate and the second component. Fasteners such as fastening bolts pass through the long holes to realize the connection between the second limit plate 8-2 and the second component 8-5. After the test platform 6 is placed between the first limit plate 8-1 and the second limit plate 8-2, the position of the second limit plate can be adjusted to ensure that the limit plates on both sides clamp the test platform.

[0051] In this embodiment, the first component 8-4 is a first concrete component, and the second component 8-5 is a second concrete component. The upper surfaces of the first component 8-4 and the second component 8-5 are respectively flush with the ground, and the first component and the second component are set at a distance.

[0052] It should be noted that there are many concrete columns on the construction site, which can be directly used as the first component 8-4 and the second component 8-5. Of course, the first component and the second component can also be cast on site according to needs, and the transverse cross-section of the first component and the second component can be circular or rectangular.

[0053] In this embodiment, the test platform 6 includes a frame 6-2, and a first connecting member 6-1 and a second connecting member 6-6 are arranged inside the frame 6-2. The first connecting member is a first lifting ear, and the second connecting member is a second lifting ear.

[0054] refer to Figure 3 and Figure 4 As shown, the frame 6-2 is a rectangular frame, and the side walls of the frame 6-2 can be made of I-beams, and the frame is formed by welding the I-beams. The first and second lifting ears are respectively arranged inward on the shorter sides of the frame. The first and second lifting ears are provided with lifting holes. The lifting ears are specifically made of steel plates and can be welded to the frame.

[0055] Specifically, the first lifting ear is connected to the first steel wire rope 2 through the first lifting shackle 1, the first steel wire rope 2 is connected to the second opening 3-3 of the connecting ear plate, the first steel wire rope 2 passes through the second opening 3-3 after bypassing the first lifting shackle 1 and is fixed; the second lifting ear 6-2 is connected to the second steel wire rope 10 through the second lifting shackle 9, and the second steel wire rope 10 is connected to the hoist 5 to be tested.

[0056] refer to Figure 5 and Figure 6 As shown, the connecting ear plate 3 is in the shape of an isosceles triangle as a whole, and each corner of the connecting ear plate is provided with an arc transition, and the longest side of the connecting ear plate 3 is an arc side. Specifically, the connecting ear plate includes a first body 3-4, and the first body 3-4 is the lower half of the connecting ear plate 3. The first body is provided with two first openings, and the two first openings 3-1 are provided with a distance therebetween. The first opening 3-1 is used for connection with the sling 4, which is convenient for dismantling or installing the hoist to be tested. The first body is fan-shaped, and the arc length of the upper side of the first body is smaller than the arc length of the lower side. The two side surfaces of the upper side of the first body 3-4 are connected to the second body 3-5, and a reinforcing rib plate 3-2 is provided between the first body and the second body to ensure the connection strength between the first body and the second body 3-5.

[0057] The sling 4 adopts the existing industrial sling, and the first lifting shackle 1 and the second lifting shackle 9 are both existing lifting shackles.

[0058] Specifically, the second body 3 - 5 is triangular in shape, a second opening is provided on the second body, two second bodies 3 - 5 are spaced apart from each other, and the second body is used for connection with the first steel wire rope 2 through the second opening 3 - 3 .

[0059] It is easy to understand that the second body 3-5 is provided at two locations, and the second body 3-5 is specifically welded to the first body 3-4, and one end of the second body away from the first body is bent outward to guide the first steel wire rope 2 to ensure the distance between the two sides of the first steel wire rope 2.

[0060] Among them, reinforcing ribs 3-2 are arranged on both side surfaces of the first body 3-4, and multiple reinforcing ribs are arranged on a single side of the first body 3-4, which can be three, and the adjacent reinforcing ribs 3-2 are arranged at a distance. The reinforcing ribs 3-2 are provided with recesses, and the reinforcing ribs are fitted with the second body through the recesses. One side of the reinforcing ribs is welded to the first body, and one side of the reinforcing ribs is welded to the second body.

[0061] In addition, the dynamometer is an existing finished product, and both ends of the dynamometer have connecting components for connecting with the second steel wire rope 10 and the hoist 5 to be tested.

[0062] The tension test device provided in this embodiment has a simple overall structure, and can be used to test multiple hand chain hoists or hand lever hoists at the same time on site with high testing efficiency. The reaction force support is supported by a supporting member fixed to the ground, and the reaction force support provides a reaction force to the test platform, which not only ensures the stability of the overall structure and makes the overall structure suitable for construction sites with more complex sites and softer ground. Moreover, the horizontally placed tension test device is convenient for replacement after the test is completed and for the rapid installation of the next hand chain hoist or hand lever hoist, thereby improving the testing efficiency on site.

[0063] Embodiment 2

[0064] This embodiment provides a method for testing the tension of a hand chain hoist at a construction site, using a hand chain hoist or lever hoist tension testing device at a construction site as described in the first embodiment, including the following contents:

[0065] Fix the reaction support 8 on the ground;

[0066] A first connecting member 6-1 and a second connecting member 6-2 are respectively arranged on opposite sides of the hollow part of the test platform 6, the first connecting member is connected to the connecting ear plate 3, the connecting ear plate 3 can be detachably connected to a plurality of hoists 5 to be tested, the hoists 5 to be tested are detachably connected to the second connecting member 6-2, and a dynamometer is arranged between the hoists to be tested and the second connecting member;

[0067] The test platform 6 is laterally arranged between the reaction force supports and the reaction force support 8 is used to provide a reaction force to the test platform 6;

[0068] Operate the hoist to be tested and observe the numerical display of the dynamometer to conduct a tensile test on the chain hoist or lever hoist.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction site hand-pulled or lever hoist tension test device, characterized in that: The invention comprises a reaction force support member, which is fixed to the ground through a supporting member. The test platform contacts the ground. The test platform is hollow. A first connecting member and a second connecting member are respectively arranged on opposite sides of the hollow part of the test platform. The first connecting member is connected to a connecting ear plate. The connecting ear plate can be detachably connected to a plurality of hoists to be tested. The hoists to be tested are detachably connected to the second connecting member. A dynamometer is arranged between the hoists to be tested and the second connecting member. The test platform is transversely arranged between the reaction force support members. The reaction force support members are fitted to the test platform to provide a reaction force to the test platform through the reaction force support members. The hoist to be tested is operated to observe the numerical display of the dynamometer to conduct a tensile test of the hand chain hoist or the hand lever hoist.

2. A construction site hand-pulled or lever hoist tension test device according to claim 1, characterized in that: The reaction force support member includes a first limit plate and a second limit plate, the first limit plate is fixed to the support member, the second limit plate is arranged opposite to the first limit plate, and the position of the second limit plate relative to the support member is movable.

3. A construction site hand-pulled or lever hoist tension test device according to claim 2, characterized in that: The support member includes a first member and a second member; The first limiting plate is L-shaped, one side of which is connected to a first component fixed to the ground; the second limiting plate is L-shaped, one side of which is connected to a second component fixed to the ground.

4. A construction site hand-pulled or lever hoist tension test device according to claim 3, characterized in that: A guide rail is arranged on the surface of the second component, and the vertical side of the second limiting plate extends beyond the guide rail and is close to one end of the first component. A slider is arranged on the second limiting plate, and the slider can move along the guide rail. Long holes are arranged on the surface of the second limiting plate and the second component respectively, and fasteners pass through the long holes to realize the connection between the second limiting plate and the second component.

5. A construction site hand-pulled or lever hoist tension test device according to claim 3, characterized in that: The first component is a first concrete component, the second component is a second concrete component, the upper surfaces of the first component and the second component are respectively flush with the ground, and the first component and the second component are spaced apart from each other.

6. A construction site hand-pulled or lever hoist tension test device according to claim 1, characterized in that: The test platform comprises a frame, and the first connecting member and the second connecting member are arranged inside the frame. The first connecting member is a first lifting ear, and the second connecting member is a second lifting ear.

7. A construction site hand-pulled or lever hoist tension test device according to claim 1, characterized in that: The first connecting member is connected to the first steel wire rope via a first lifting shackle, and the first steel wire rope is connected to the connecting ear plate; The second connecting member is connected to the second steel wire rope through a second lifting shackle, and the second steel wire rope is connected to the hoist to be tested.

8. A construction site hand-pulled or lever hoist tension test device according to claim 1, characterized in that: The connecting ear plate is triangular in shape, and includes a first body connected to the hoist to be tested, the first body is provided with a plurality of first openings, the first openings are connected to the hoist to be tested through a sling, the first body is fan-shaped, the upper side of the first body is connected to the second body, the second bodies are provided on both sides of the first body, the second body is provided with second openings, and the second openings are connected to the first connecting member.

9. A construction site hand-pulled or lever hoist tension test device according to claim 8, characterized in that: One end of the second body away from the first body is bent outward, and a plurality of reinforcing ribs are arranged between the first body and the second body.

10. A method for testing the pulling force of a hand chain hoist at a construction site, characterized in that: A construction site hand-pulled or lever hoist tension test device according to any one of claims 1 to 9, comprising the following contents: Fix the reaction support on the ground; A first connecting member and a second connecting member are respectively arranged on opposite sides of the hollow part of the test platform, the first connecting member is connected to a connecting ear plate, the connecting ear plate can be detachably connected to a plurality of hoists to be tested, the hoists to be tested are detachably connected to the second connecting member, and a dynamometer is arranged between the hoists to be tested and the second connecting member; The test platform is laterally arranged between the reaction force supports to provide a reaction force to the test platform through the reaction force supports; Operate the hoist to be tested and observe the numerical display of the dynamometer to conduct a tensile test on the chain hoist or lever hoist.

Images