Protection performance testing device for falling protection safety belt

Abstract

The utility model discloses a protection performance testing device for a falling protection safety belt, which is characterized by comprising a testing frame, a testing dummy and a safety rope, the testing frame comprises a supporting frame and a fixing frame fixedly installed on the supporting frame. Transmission equipment is mounted on the support frame; the transmission equipment is connected with the releaser through a connecting rope; the releaser is connected with the test dummy; a to-be-tested safety belt is tied on the body of the test dummy; an impact force sensor is mounted on the fixing frame; the impact force sensor is connected with a test frame hanging point; one end of the safety rope is connected with the test rack hanging point, and the other end is connected with the to-be-tested safety belt. The device is simple in structure and more convenient to operate, and the falling process of the dummy wearing the safety belt can be effectively simulated.

Description

Technical Field

[0001] The utility model relates to the technical field of protection performance testing of a fall protection safety belt, and more specifically to a protection performance testing device for a fall protection safety belt. Background Art

[0002] Fall protection safety belts play a role in protecting the safety of workers working at heights. After a fall occurs, the safety belts transfer the impact force to various parts of the human body and disperse the impact force, reducing the risk of injury to workers working at heights.

[0003] At present, the test device used in the test of the protective performance of fall protection belts has a relatively complex structure and can only test the impact peak in the vertical direction during the fall, resulting in a single test result. The realism of the dummy used in the test of the protective performance of fall protection belts is not high, resulting in a large error between the simulated fall process and the actual situation, and it is impossible to obtain the mechanical parameter values ​​and damage conditions of various parts of the dummy. The application scenarios of the dummy are limited, and it is impossible to fully evaluate the protective performance of the fall protection belt during the entire fall process.

[0004] Therefore, how to simplify the protective performance test device of the fall protection safety belt, while improving the comprehensiveness of the evaluation of the fall protection safety belt and improving the realism of the test dummy is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] In view of this, the utility model provides a fall protection safety belt protection performance testing device to at least solve some of the technical problems mentioned in the above background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fall protection safety belt protection performance testing device, comprising a test frame, a test dummy and a safety rope;

[0008] The test frame includes a support frame and a fixing frame fixedly mounted on the support frame;

[0009] A transmission device 1 is installed on the support frame;

[0010] The transmission device 1 is connected to the releaser 3 via a connecting rope 2;

[0011] The releaser 3 is connected to the test dummy; the test dummy is fastened with a safety belt to be tested;

[0012] An impact force sensor 4 is installed on the fixing frame;

[0013] The impact force sensor 4 is connected to a test frame hanging point 5;

[0014] One end of the safety rope is connected to the test frame hanging point 5, and the other end is connected to the safety belt to be tested.

[0015] Further, the said includes an upper support plate 61 and a lower support plate 62;

[0016] The upper support plate 61 and the lower support plate 62 are fixedly connected by two support rods 63;

[0017] The transmission device 1 is mounted on the upper support plate 61 .

[0018] Further, the fixing frame includes a first fixing plate 71, a second fixing plate 72 and a fixing rod 73;

[0019] The first fixing plate 71 is installed between the two support rods 63;

[0020] The second fixing plate 72 is horizontally mounted in the middle of the first fixing plate 71; the impact force sensor 4 is mounted on the second fixing plate 72;

[0021] The two fixing rods 73 are symmetrically installed below the first fixing plate 71 with the second fixing plate 72 as a symmetry point, so as to achieve a fixed connection between the first fixing plate 71 and the lower support plate 62 .

[0022] Furthermore, the overall standing height of the test dummy is 1690.0 mm±7.6 mm; and the total weight is 67.14 kg±1 kg.

[0023] Further, the test dummy includes a head assembly 81, a neck assembly 82, a chest assembly 83, a shoulder assembly 84, an arm assembly 85, a hip assembly 86 and a leg assembly 87;

[0024] A head acceleration sensor 811 is installed in the head assembly 81;

[0025] An upper neck force sensor 821 is installed in the neck assembly 82;

[0026] The chest assembly 83 is installed with a chest acceleration sensor 831 and a chest displacement sensor 832;

[0027] The chest assembly 83 , the shoulder assembly 84 , the arm assembly 85 , the hip assembly 86 and the leg assembly 87 are externally mounted with angle sensors.

[0028] Further, the head acceleration sensor 811 and the chest acceleration sensor 831 are both single-axis acceleration sensors, and the number of the head acceleration sensor 811 and the number of the chest acceleration sensor 831 are both multiple;

[0029] The upper neck force sensor is a three-dimensional six-axis force-torque sensor.

[0030] Furthermore, the chest assembly 83 includes a steel spine and ribs; a damping layer is bonded to the outer side of the ribs; and a spring steel sheet is installed between every two ribs.

[0031] Furthermore, the hip assembly 86 is an integrated structure, including a lumbar portion, a pelvic portion, a femoral portion and an upper thigh portion.

[0032] Furthermore, a triangular support frame 9 is provided above the releaser 3 .

[0033] Furthermore, a high-speed camera is also included.

[0034] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses a fall protection safety belt protection performance testing device, which has the following beneficial effects:

[0035] The utility model can ensure the stability of the test device through the support frame and the fixing frame, avoid the deviation of the test result due to the displacement of the test device, thereby improving the accuracy of subsequent test results; and the test frame structure composed of the support frame and the fixing frame is simpler.

[0036] The utility model puts a safety belt on a dummy and simulates a falling process through a test frame. Combined with various types of sensors, the mechanical load bearing condition of relevant parts of the human body and the state during the falling process can be monitored in real time, so that the test results are more in line with the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0038] Figure 1 The utility model is a side view schematic diagram of the test stand provided by the utility model.

[0039] Figure 2 This is a front view schematic diagram of the test stand provided by the utility model.

[0040] Figure 3 This is a schematic diagram of the overall structure of the test dummy provided by the utility model.

[0041] Figure 4 This is a schematic diagram of the sensor distribution provided by the utility model.

[0042] In the figure, 1-transmission equipment; 2-connecting rope; 3-releaser; 4-impact force sensor; 5-test frame hanging point; 61-upper support plate; 62-lower support plate; 63-support rod; 71-first fixing plate; 72-second fixing plate; 73-fixing rod; 81-head assembly; 811-head acceleration sensor; 82-neck assembly; 821-upper neck force sensor; 83-chest assembly; 831-chest acceleration sensor; 832-chest displacement sensor; 84-shoulder assembly; 85-arm assembly; 86-hip assembly; 87-leg assembly; 9-triangular support frame. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] The utility model discloses a fall protection safety belt protection performance test device, including a test frame, a test dummy and a safety rope; wherein:

[0045] The test frame includes a support frame and a fixed frame fixedly mounted on the support frame; wherein a transmission device 1 is mounted on the support frame; the transmission device 1 is connected to a releaser 3 via a connecting rope 2; the releaser 3 is connected to a test dummy; and a safety belt to be tested is fastened on the test dummy;

[0046] An impact force sensor 4 is installed on the fixing frame; the impact force sensor 4 is connected to a test frame hanging point 5; one end of the safety rope is connected to the test frame hanging point 5, and the other end is connected to the safety belt to be tested.

[0047] The transmission device 1 can be a mechanical transmission, an electrical transmission, a hydraulic transmission or a pneumatic transmission. During the specific use of the fall protection seat belt protection performance test device, the test dummy is raised to a preset test height through the transmission device 13, and then the test dummy is released to realize the test of the impact force of the seat belt to be tested.

[0048] Next, each of the above parts will be described in detail.

[0049] 1. Support frame and fixing frame:

[0050] See also Figure 1 and Figure 2As shown, the support frame includes an upper support plate 61 and a lower support plate 62; the upper support plate 61 and the lower support plate 62 are fixedly connected by two support rods 63; the transmission device 1 is installed on the upper support plate 61;

[0051] The fixing frame includes a first fixing plate 71, a second fixing plate 72 and a fixing rod 73; the first fixing plate 71 is installed between the two support rods 63; the second fixing plate 72 is horizontally installed in the middle of the first fixing plate 71; the impact force sensor 4 is installed on the second fixing plate 72; the two fixing rods 73 are symmetrically installed below the first fixing plate 71 with the second fixing plate 72 as a symmetric point, so as to realize the fixed connection between the fixing plate 71 and the lower support plate 62;

[0052] The support frame and the fixing frame can ensure the stability of the test device, avoid deviation of the data obtained by the impact force sensor due to the displacement of the test device, thereby improving the accuracy of subsequent test results; and the test frame structure composed of the support frame and the fixing frame is simpler.

[0053] 2. Test dummy:

[0054] The overall standing height of the test dummy is 1690.0mm±7.6mm; the total weight is 67.14kg±1kg, and the ratio of height and weight is more in line with human characteristics; for details, please refer to Figure 3 and Figure 4 As shown, the test dummy includes a head assembly 81, a neck assembly 82, a chest assembly 83, a shoulder assembly 84, an arm assembly 85, a hip assembly 86 and a leg assembly 87; the frame of the test dummy is a metal frame, and its skin is a rubber skin; specifically:

[0055] 1. Head assembly 81:

[0056] The head assembly 81 is mainly composed of an aluminum skull, a back of the head and a rubber skin, simulating the dynamic response of a human head when subjected to an external impact; a head acceleration sensor 811 is installed in the head assembly 81; the head acceleration sensor 811 is a single-axis acceleration sensor, and there are multiple of them;

[0057] Since a single-axis acceleration sensor can only measure acceleration values ​​in a single direction, three mutually orthogonal single-axis acceleration sensors are installed in the head assembly 81 in the embodiment of the utility model, which are used to test the acceleration values ​​of the head in the three directions of X-axis, Y-axis and Z-axis respectively.

[0058] 2. Neck assembly 82:

[0059] The neck assembly 82 and the head assembly 81 are connected by hexagon socket head screws and neck bracket washers; the neck assembly 82 is mainly formed by an aluminum frame and rubber injection, and its interior is tightened by a neck steel cable, and can swing back and forth and left and right to simulate the dynamic response of the neck when subjected to external impact; an upper neck force sensor 821 is installed in the neck assembly 82; the upper neck force sensor 821 is a three-dimensional six-axis force-torque sensor, which can be used to test the force and torque of the neck in three directions of the X-axis, Y-axis and Z-axis.

[0060] 3. Chest assembly 83:

[0061] The chest assembly 83 includes ribs and a steel spine; wherein: a damping layer is bonded to the outside of the ribs; a spring steel sheet is installed between every two ribs; under the combined action of the damping layer and the spring steel sheet, the chest can be made viscoelastic, thereby simulating the dynamic response of the chest when subjected to external impact; the top of the steel spine is connected to the neck assembly 82 through the lower neck bracket, and the bottom of the steel spine is connected to the hip assembly 86 through a threaded hole; the steel spine is an important component that connects the hip assembly 86 and the neck assembly 82 and supports the upper torso; the front chest of the chest assembly 83 is connected to the shoulder assembly 84 through two grooves, and the back is connected to the ribs through threaded holes; in addition, the chest assembly 83 and the shoulder assembly 84 are connected by hexagon socket head screws at the upper end of the thoracic spine;

[0062] A chest acceleration sensor 831 is installed in the chest assembly 83; the chest acceleration sensor 831 is a single-axis acceleration sensor, and there are multiple of them; since a single-axis acceleration sensor can only measure the acceleration value in a single direction, therefore, in the embodiment of the utility model, three mutually orthogonal single-axis acceleration sensors are installed in the chest assembly 83, which are used to test the acceleration values ​​of the chest in the three directions of the X-axis, the Y-axis and the Z-axis respectively;

[0063] A chest displacement sensor 832 is also installed in the chest assembly 83 for testing the change in chest displacement; an angle sensor is also provided outside the chest assembly 83 for obtaining the overall tilt angle of the test dummy.

[0064] 4. Shoulder assembly 84:

[0065] The shoulder assembly 84 includes an aluminum shoulder blade and an aluminum clavicle; the shoulder assembly 84 and the arm assembly 85 are connected by a hexagon socket head cylindrical shoulder screw fixed to the shoulder assembly;

[0066] 5. Arm assembly 85:

[0067] The arm assembly 85 is divided into a left arm assembly and a right arm assembly, and the left and right arm assemblies each include an upper arm, a lower arm, and a hand; each arm joint is equipped with a nylon protective pad, and the upper and lower arms and the hand can rotate around the joints; the upper arm is movably connected to the shoulder assembly 84 and can rotate forward and backward and up and down around the shoulder assembly 84;

[0068] An angle sensor is installed on the outside of the arm assembly 85 to set the inclination angle of each joint of the arm of the test dummy during the initial fall.

[0069] 6. Hip assembly 86:

[0070] The hip assembly 86 is an integrated structure, including a lumbar spine, a pelvic portion, a femoral portion and an upper thigh portion; the integrated structure can prevent the fixed position of the hip safety belt from changing due to the free fall of the test dummy, thereby ensuring the stability of the test safety belt wearing;

[0071] The hip assembly 86 and the leg assembly 87 are connected by hexagon socket head screws fixed at the femur;

[0072] An angle sensor is installed on the outside of the hip assembly 86 to obtain the inclination of the hip assembly 86 relative to the whole body during the fall of the test dummy, so as to determine the deformation of the hip assembly 86.

[0073] 7. Leg assembly 87:

[0074] The leg assembly 87 is divided into a left leg assembly and a right leg assembly, both of which are composed of a thigh, a knee, a calf and a foot. The thigh is fixed to the femur through a thigh frame, the knee, the calf and the foot are movably connected in sequence, the calf can rotate around the knee joint, and the foot can adjust the angle through the ankle joint;

[0075] An angle sensor is installed on the outside of the leg assembly 87 to set the inclination angle of each leg joint of the test dummy during the initial fall;

[0076] Based on the angle sensors installed outside the chest assembly 83, shoulder assembly 84, arm assembly 85, hip assembly 86 and leg assembly 87, the initial falling orientation and posture of the test dummy can be set before the test dummy is released, including the overall inclination angle of the test dummy and the inclination angles of each joint; the posture and deformation of the test dummy during the falling process can also be obtained;

[0077] Based on the above-mentioned head acceleration sensor 811, upper neck force sensor 821, chest acceleration sensor 831, chest displacement sensor 832 and angle sensors installed in various parts, it is possible to test the mechanical parameters of the test dummy during the falling process, effectively solving the problem that the existing test results are single and the force conditions of various parts of the dummy cannot be obtained.

[0078] In another embodiment, see Figure 2 As shown, a triangular support frame 9 is provided above the releaser 3 to play a fixing role, ensuring that the connecting rope 2 and the releaser 3 remain vertical during the up and down movement, and preventing the releaser 3 from shaking during the release of the dummy and affecting the test results.

[0079] In another embodiment, a protective component is provided around the impact force sensor 4 to protect the impact force sensor 4 and prevent the impact force sensor from being damaged by the test dummy due to the arm raising at the moment of release.

[0080] In another embodiment, the testing device further comprises a high-speed camera for recording in real time the movement trajectory and posture of the test dummy during the falling process after being released.

[0081] In summary, the utility model provides a device for testing the protective performance of a fall protection safety belt. A dummy is put on the safety belt, and the falling process is simulated through a test frame. Combined with various types of sensors, the mechanical load bearing condition of relevant parts of the human body and the state during the falling process can be monitored in real time, so that the test results are more in line with the actual situation and the breadth and depth of the protection performance evaluation are expanded.

[0082] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A fall protection safety belt protection performance testing device, characterized in that: Includes test stand, test dummy and safety rope; The test frame includes a support frame and a fixing frame fixedly mounted on the support frame; A transmission device (1) is installed on the support frame; The transmission device (1) is connected to the releaser (3) via a connecting rope (2); The releaser (3) is connected to the test dummy; the test dummy is fastened with a safety belt to be tested; An impact force sensor (4) is installed on the fixing frame; The impact force sensor (4) is connected to a test frame hanging point (5); One end of the safety rope is connected to the test frame hanging point (5), and the other end is connected to the safety belt to be tested; The overall standing height of the test dummy is 1690.0 mm ± 7.6 mm; the total weight is 67.14 kg ± 1 kg; The test dummy comprises a head assembly (81), a neck assembly (82), a chest assembly (83), a shoulder assembly (84), an arm assembly (85), a hip assembly (86) and a leg assembly (87); A head acceleration sensor (811) is installed in the head assembly (81); An upper neck force sensor (821) is installed in the neck assembly (82); A chest acceleration sensor (831) and a chest displacement sensor (832) are installed in the chest assembly (83); Angle sensors are installed outside the chest assembly (83), the shoulder assembly (84), the arm assembly (85), the hip assembly (86) and the leg assembly (87).

2. A fall protection safety belt protection performance testing device according to claim 1, characterized in that: The support frame comprises an upper support plate (61) and a lower support plate (62); The upper support plate (61) and the lower support plate (62) are fixedly connected via two support rods (63); The transmission device (1) is mounted on the upper support plate (61).

3. A fall protection safety belt protection performance testing device according to claim 2, characterized in that: The fixing frame comprises a first fixing plate (71), a second fixing plate (72) and a fixing rod (73); The first fixing plate (71) is installed between the two support rods (63); The second fixing plate (72) is horizontally mounted in the middle of the first fixing plate (71); the impact force sensor (4) is mounted on the second fixing plate (72); The two fixing rods (73) are symmetrically installed below the first fixing plate (71) with the second fixing plate (72) as a symmetry point, so as to achieve a fixed connection between the first fixing plate (71) and the lower support plate (62).

4. A fall protection safety belt protection performance testing device according to claim 1, characterized in that: The head acceleration sensor (811) and the chest acceleration sensor (831) are both single-axis acceleration sensors, and the number of the head acceleration sensor (811) and the number of the chest acceleration sensor (831) are both multiple; The upper neck force sensor is a three-dimensional six-axis force-torque sensor.

5. A fall protection safety belt protection performance testing device according to claim 1, characterized in that: The chest assembly (83) comprises a steel spine and ribs; a damping layer is bonded to the outer side of the ribs; and a spring steel sheet is installed between every two ribs.

6. A fall protection safety belt protection performance testing device according to claim 1, characterized in that: The hip assembly (86) is an integrated structure, including a lumbar spine, a pelvic bone, a femoral bone and an upper thigh.

7. A fall protection safety belt protection performance testing device according to claim 1, characterized in that: A triangular support frame (9) is provided above the releaser (3).

8. A fall protection safety belt protection performance testing device according to claim 1, characterized in that: Also includes high-speed cameras.

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