Forklift attachment for carrying and installing hollow concrete guardrail

Abstract

The invention relates to the technical field of hollow concrete guardrail installation, in particular to a forklift attachment for carrying and installing a hollow concrete guardrail, which comprises a clamping device, a fork arm carrier connecting frame and a base slidably arranged on the fork arm carrier connecting frame, and a position adjusting mechanism is arranged between the base and the fork arm carrier connecting frame; the clamping device comprises an upper arm, a bearing lower arm and a connecting arm, a connecting part is arranged on one side of the bearing lower arm, the connecting arm and the upper arm are hinged to the upper side and the lower side of the connecting part of the bearing lower arm respectively, the ends, close to the base, of the connecting arm and the upper arm are hinged to the base, and a clamping piece matched with the bearing lower arm is arranged at the end, away from the base, of the upper arm. And a clamping oil cylinder is arranged between the base and the bearing lower arm. According to the clamping device, a parallelogram structure is adopted, so that the structure can achieve clamping movement through stretching and retracting of an oil cylinder, a carrying and mounting scheme is provided for the hollow concrete guardrail, and the stability in the carrying and mounting process is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hollow concrete guardrail installation, and more specifically to a forklift attachment for transporting and installing hollow concrete guardrails. Background Art

[0002] During the construction and maintenance of transportation infrastructure, UHPC hollow concrete guardrails have been widely promoted due to their economy and convenience, and are about to replace corrugated guardrails for large-scale construction. However, the guardrails are heavy and large in size, with a high center of gravity. Transportation and installation usually require a large number of personnel to assist, and safety and installation convenience cannot be guaranteed. At present, when transporting and installing hollow concrete guardrails, most methods such as hoisting and direct forking by forklifts are used for transportation and positioning. This method is not only time-consuming and labor-intensive, but also easily causes damage to the surface of the guardrail during operation, affecting its appearance and service life, and may even cause harm to construction workers. In addition, in the prior art, common handling and installation equipment often lacks protective measures for guardrail clamping, which can easily cause scratches and wear on the guardrail during clamping and transportation, thereby affecting the appearance and use of the guardrail. Most of the forklift attachments in the prior art are of simple design and cannot effectively clamp and accurately position hollow concrete guardrails. Especially during the handling process, due to the large size and high center of gravity of the guardrail, traditional forklift attachments are difficult to maintain the stability of the guardrail, which easily causes the guardrail to shake and fall, posing a great safety hazard during the handling and installation process. Therefore, there is an urgent need for a forklift attachment that can effectively clamp, protect and is easy to operate, so as to improve the handling and installation efficiency of hollow concrete guardrails, reduce the risk of guardrail damage, and improve the safety and convenience of construction. Summary of the invention

[0003] In order to overcome the deficiencies in the prior art, a forklift attachment for transporting and installing hollow concrete guardrails is provided, which can clamp the guardrail and move horizontally, the clamping device can be quickly disassembled and assembled, has a simple and convenient structure, high working efficiency and high safety.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A forklift attachment for transporting and installing a hollow concrete guardrail comprises a clamping device, a fork frame connection frame and a base slidably arranged on the fork frame connection frame, wherein a position adjustment mechanism is arranged between the base and the fork frame connection frame; The clamping device comprises an upper arm, a load-bearing lower arm and a connecting arm, one side of the load-bearing lower arm is provided with a connecting portion, the connecting arm and the upper arm are respectively hinged at the upper and lower sides of the connecting portion of the load-bearing lower arm, one end of the connecting arm and the upper arm close to the base is hinged to the base, and the end of the upper arm away from the base is provided with a clamping piece matched with the load-bearing lower arm; A clamping oil cylinder is arranged between the base and the load-bearing lower arm.

[0005] Preferably, the base is provided with several parts on the fork frame connection frame, a polished rod is fixedly provided on the upper side of the fork frame connection frame, a limit plate is provided on the lower side of the fork frame connection frame, a linear bearing assembly position is provided on the upper end of the base, and the linear bearing assembly position cooperates with the polished rod to form a linear bearing; a limit structure cooperating with the limit plate is provided on the lower end of the base; A position adjustment mechanism is arranged between adjacent bases.

[0006] Preferably, the upper end surface of the load-bearing lower arm is provided with a rubber pad and a spring boss for inserting into the gap of the hollow concrete guardrail.

[0007] Preferably, a hanging ring is provided at the upper end of the base, and the linear bearing assembly position is arranged in the hanging ring.

[0008] Preferably, the position adjustment mechanism comprises a horizontal moving cylinder, and an end of the horizontal adjustment cylinder is hinged to the base or the fork frame connection frame.

[0009] Preferably, the base, the upper arm, the load-bearing lower arm connecting portion, and the connecting arm form a parallelogram mechanism.

[0010] Preferably, the clamping member includes an adaptor, which is hinged at the lower end of the upper arm, and a rubber pad is provided on the lower end surface of the adaptor.

[0011] Preferably, a fork frame assembly hole is provided at the top of the fork frame connecting frame.

[0012] Preferably, the upper arm is in a Y-shaped structure and is provided with a weight-reducing hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The clamping device of the present invention adopts a "parallelogram" structure, so that the structure can realize clamping movement through the extension and contraction of the oil cylinder, which not only provides a transportation and installation solution for the hollow concrete guardrail, but also improves the stability during the transportation and installation process. In the present invention, the base and the fork frame are slidably matched, and the guardrail can be horizontally translated, which improves the assembly accuracy and reduces the difficulty of guardrail assembly, and can cope with more complex working environments.

[0014] 2. A fork frame connection frame can be equipped with multiple clamping devices, which have the ability to be quickly disassembled and installed. It can be flexibly replaced according to usage requirements, and one, two or three clamping devices can be installed.

[0015] 3. The upper arm is equipped with an adaptor, which makes installation and handling operations simpler and eliminates the need for tedious alignment operations, thereby improving work efficiency. It also makes the hollow concrete guardrail more stable during handling and installation, increasing safety. The load-bearing lower arm is equipped with a spring boss that can hold the guardrail gap, increasing safety during transportation. In addition, the spring boss contracts under force to prevent damage to the guardrail by collision with it. Rubber buffer materials are installed on the contact surfaces of the adaptor, the load-bearing lower arm and the hollow concrete guardrail, reducing damage to the hollow concrete guardrail during transportation and extending the service life of the device.

[0016] 4. The present invention has a simple structure and can be directly installed on the fork frame of a forklift, which is convenient for the staff to operate and can significantly reduce the labor intensity of the staff. In addition, the structure principle is simple and the damage and repair are relatively simple, so it has good economy for long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of one angle of the present invention; Figure 2 It is a structural schematic diagram of another angle of the present invention; Figure 3 It is a schematic diagram of the structure of a single clamping device; Figure 4 It is a schematic diagram of the fork frame connection structure; Figure 5 is a schematic diagram of the base structure; Figure 6 is a schematic diagram of the connecting arm structure; Figure 7 Schematic diagram of the upper arm structure; Figure 8 It is a schematic diagram of the load-bearing lower arm structure; Fig. 9 Schematic diagram of the adaptive device structure; Fig.10 It is a schematic diagram of the clamping cylinder structure; Fig.11 This is a schematic diagram of the clamping state of the present invention; In the figure: 1-clamping device, 11-upper arm, 12-load-bearing lower arm, 13-connecting arm, 14-connecting part, 15-spring boss, 16-rubber pad, 2-fork frame connecting frame, 21-bare rod, 22-limiting plate, 23-fork frame assembly hole, 3-base, 31-linear bearing assembly position, 4-position adjustment mechanism, 5-clamping piece, 6-clamping cylinder, 7-hollow concrete guardrail. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 11 As shown, a forklift attachment for transporting and installing a hollow concrete guardrail includes a clamping device 1, a fork frame connection frame 2 and a base 3. The fork frame connection frame 2 is used to connect with the fork frame of an existing forklift. The base 3 is slidably arranged on the fork frame connection frame 2, and the clamping device 1 is arranged on the base 3. One or more bases 3 and clamping devices 1 can be provided, and three are provided in this embodiment.

[0021] The clamping device 1 includes an upper arm 11, a load-bearing lower arm 12 and a connecting arm 13. The load-bearing lower arm 12 has a connecting portion 14 on one side. The connecting arm 13 and the upper arm 11 are respectively hinged on the upper and lower sides of the load-bearing lower arm connecting portion 14. Preferably, the connecting arm 13 or the upper arm 11 is hinged to the load-bearing lower arm connecting portion 14 by a bolt, a sleeve and two nuts. The ends of the connecting arm 13 and the upper arm 11 close to the base 3 are hinged to the base 3, so that the base 3, the upper arm 11, the load-bearing lower arm connecting portion 14 and the connecting arm 13 form a parallelogram mechanism. A clamping cylinder 6 is provided between the base 3 and the load-bearing lower arm 12, and ear seats hinged to the clamping cylinder 6 are respectively provided on the base 3 and the load-bearing lower arm 12, and the movement of the clamping device 1 is controlled by the extension and contraction of the clamping cylinder 6. Preferably, the upper arm 11 is in a Y-shaped structure, and a weight-reducing hole is provided on the upper arm 11.

[0022] The upper arm 11 is provided with a clamping member 5 that matches with the load-bearing lower arm 12 at one end away from the base 3. Preferably, the clamping member 5 is as follows: Fig. 9 The adaptor shown is hinged at the lower end of the upper arm 11, and the lower end surface of the adaptor and the upper end surface of the load-bearing lower arm 12 are both provided with rubber pads 16 to prevent indentation and wear of the hollow concrete guardrail 7 during transportation and installation.

[0023] A bare rod 21 is fixedly arranged on the upper side of the fork frame connecting frame 2, a limit plate 22 is arranged on the lower side of the fork frame connecting frame 2, a linear bearing assembly position 31 is arranged on the upper end of the base 3, the linear bearing assembly position 31 cooperates with the bare rod 21 to form a linear bearing, thereby reducing the friction force when the base 3 moves horizontally, and a limit structure cooperating with the limit plate 22 is arranged on the lower end of the base 3, and the lower end of the base 3 is always in contact with the limit plate 22 through the gravity of the clamping device 1 and the hollow concrete guardrail 7.

[0024] A position adjustment mechanism 4 is provided between the base 3 near the side of the fork frame connection frame 2 and the fork frame connection frame 2. When multiple bases 3 are provided, position adjustment mechanisms 4 are also provided between adjacent bases 3. Preferably, the position adjustment mechanism 4 includes a horizontally movable cylinder, the end of which is hinged to the base 3 or the fork frame connection frame 2, and the position of the base 3 is horizontally adjusted by the horizontally movable cylinder.

[0025] The upper end surface of the load-bearing lower arm 12 is provided with a spring boss 15 for inserting into the notch of the hollow concrete guardrail 7, so that it can be aligned with the middle hollow hole of the hollow concrete guardrail 7 when transporting and installing the hollow concrete guardrail 7, and automatically retracted when hit to prevent the concrete guardrail from being damaged by bumps.

[0026] Preferably, a hanging ring is provided at the upper end of the base 3, and a linear bearing assembly position 31 is provided in the hanging ring, so as to facilitate the disassembly and assembly of the base 3. A fork frame assembly hole 23 is provided at the top of the fork frame connection frame 2, so as to facilitate the connection with the fork frame of the forklift.

[0027] Working principle: like Figure 1 As shown, when the horizontal moving cylinder is extended, the base 3 will translate to the right, thereby driving the single clamping device 1 to move to the right. Similarly, when the horizontal moving cylinder is shortened, the base 3 will translate to the left, thereby driving the single clamping device 1 to translate to the left. When the clamping cylinder 6 is extended, it will drive the connecting arm 13 to rotate counterclockwise relative to the base 3, and the upper arm 13 and the clamping member 5 will also rotate counterclockwise relative to the base 3 by the same angle.

[0028] At the same time, the load-bearing lower arm 12 will move upwards for a short distance. At this time, the angle between the load-bearing lower arm 12 and the upper arm 11 will increase, and the load-bearing lower arm 12 will be in an open state. The operator can drive the forklift to insert the load-bearing lower arm 12 into the side of the hollow concrete guardrail 7. When the load-bearing lower arm 12 is extended, the spring boss 15 is forced to shrink to prevent the guardrail from colliding with the guardrail and damaging the guardrail. When the spring boss 15 is stuck in the middle opening of the guardrail, it can prevent the guardrail from sliding off and increase the safety of transportation.

[0029] Control the clamping cylinder 6 to shorten, the connecting arm 2 rotates clockwise relative to the base 3, and the upper arm 13 drives the adaptor to rotate clockwise by the same angle. At the same time, the load-bearing lower arm 12 will move slightly downward. At this time, the angle between the load-bearing lower arm 12 and the upper arm 13 will decrease until the adaptor 6 and the load-bearing lower arm 12 firmly clamp the hollow concrete guardrail 7. At this time, the operator can drive the forklift to move the hollow concrete guardrail to the designated location. Perform the opposite operation to firmly remove the hollow concrete guardrail from the load-bearing lower arm 12, thereby completing the installation.

[0030] If multiple clamping devices 1 are installed, the methods of clamping and putting down are the same, and the distance between the devices can be adjusted by a position adjustment mechanism.

[0031] Preparation method: The structural design of the fork frame connection frame 2 is as follows: Figure 4 As shown. Due to the complex working environment of the equipment and the heavy hollow concrete guardrail 7, the fork frame connection frame 2 is often subjected to a large force. Therefore, the structure is welded by 3 pieces of 45# steel plates and 1 piece of 45# steel beam. A light rod 21 is installed on the upper part of the fork frame connection frame 2, and a linear bearing is installed to facilitate assembly with the linear bearing assembly position 31 on the base 3. In addition, an ear seat for connecting the oil cylinder is welded on the carbon steel plate on the side.

[0032] like Figure 5 As shown, the base 3 is mainly made of a central 45# steel beam and multiple 45# steel plates welded together, two cylinder connecting ears are welded on the side and front sides respectively for connecting the cylinder, and a linear bearing assembly position 31 is welded on the carbon steel plate on the upper part.

[0033] like Figure 6 As shown, the connecting arm 13 is made of 45# steel plate and has holes at both ends for connection.

[0034] like Figure 7 As shown, the upper arm 11 is welded from 45# steel plate cut pieces. Considering the lightweight requirements, weight-reducing notches and round holes are opened on the upper arm 11. Holes for connecting the adaptor and the load-bearing lower arm and base are also opened on the side.

[0035] like Figure 8 As shown, the load-bearing lower arm 12 is mainly made of two 45# steel beams welded together to form an "L" shape. Three triangular steel plates are welded at the welding point of the two carbon steel beams to prevent stress concentration. At the same time, the oil cylinder connecting lugs are welded on the vertical carbon steel beam to connect the oil cylinder. At the same time, holes are punched on the vertical steel beam to connect bolts.

[0036] like Fig. 9 As shown in FIG. 1 , the adaptor is mainly made of three steel plates welded together, and weight-reducing holes are respectively opened on two vertical steel plates to achieve the purpose of reducing weight. Holes are punched on two vertical trapezoidal carbon steel plates for connecting bolts.

[0037] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A forklift attachment for transporting and installing hollow concrete guardrails, characterized in that: It comprises a gripping device (1), a fork frame connecting frame (2), and a base (3) slidably arranged on the fork frame connecting frame (2), and a position adjustment mechanism (4) is arranged between the base (3) and the fork frame connecting frame (2); The clamping device (1) comprises an upper arm (11), a load-bearing lower arm (12) and a connecting arm (13); one side of the load-bearing lower arm (12) is provided with a connecting portion (14); the connecting arm (13) and the upper arm (11) are respectively hinged to the upper and lower sides of the load-bearing lower arm connecting portion (14); one end of the connecting arm (13) and the upper arm (11) close to the base (3) are both hinged to the base (3); and one end of the upper arm (11) away from the base (3) is provided with a clamping member (5) that cooperates with the load-bearing lower arm (12); A clamping cylinder (6) is provided between the base (3) and the load-bearing lower arm (12).

2. A forklift attachment for transporting and installing hollow concrete guardrails according to claim 1, characterized in that: The base (3) is provided with a plurality of parts on the fork frame connection frame (2); a light rod (21) is fixedly provided on the upper side of the fork frame connection frame (2); a limit plate (22) is provided on the lower side of the fork frame connection frame (2); a linear bearing assembly position (31) is provided at the upper end of the base (3); the linear bearing assembly position (31) cooperates with the light rod (21) to form a linear bearing; and a limit structure cooperating with the limit plate (22) is provided at the lower end of the base (3); A position adjustment mechanism (4) is provided between adjacent bases (3).

3. The forklift attachment for transporting and installing hollow concrete guardrails according to claim 1, characterized in that: The upper end surface of the load-bearing lower arm (12) is provided with a rubber pad (16) and a spring boss (15) for inserting into the notch of the hollow concrete guardrail (7).

4. The forklift attachment for transporting and installing hollow concrete guardrails according to claim 2, characterized in that: The upper end of the base (3) is provided with a hanging ring, and the linear bearing assembly position (31) is arranged in the hanging ring.

5. A forklift attachment for transporting and installing hollow concrete guardrails according to claim 1 or 2, characterized in that: The position adjustment mechanism (4) comprises a horizontal movable cylinder, the end of which is hinged to the base (3) or the fork frame connection frame (2).

6. The forklift attachment for transporting and installing hollow concrete guardrails according to claim 1, characterized in that: The base (3), the upper arm (11), the load-bearing lower arm connecting portion (14), and the connecting arm (13) form a parallelogram mechanism.

7. The forklift attachment for transporting and installing hollow concrete guardrails according to claim 1, characterized in that: The clamping member (5) comprises an adaptor, which is hinged to the lower end of the upper arm (11), and a rubber pad (16) is provided on the lower end surface of the adaptor.

8. The forklift attachment for transporting and installing hollow concrete guardrails according to claim 1, characterized in that: A fork frame assembly hole (23) is provided at the top end of the fork frame connection frame (2).

9. The forklift attachment for transporting and installing hollow concrete guardrails according to claim 1, characterized in that: The upper arm (11) is in a Y-shaped structure, and a weight-reducing hole is provided on the upper arm (11).

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