Manhole cover opening apparatus with binding plate

Abstract

The present invention relates to a device for opening a manhole cover (90), comprising a frame (10) that is seated on the upper side of the manhole, a pair of lifting plates (20) that are coupled to the frame (10), and a turnbuckle (30) that connects the two lifting plates (20), wherein the manhole cover (90) is opened as the lifting plates (20) rise by shortening the turnbuckle (30). Through the present invention, sufficient opening force can be applied to the manhole cover (90) even with a simple configuration, and at the same time, the opening force can be distributed and applied to both sides of the manhole cover (90) rather than being limited to a specific point of the manhole cover (90).

Description

Technology Field

[0001] The present invention relates to a device for opening a manhole cover (90), comprising a frame (10) that is seated on the upper side of the manhole, a pair of lifting plates (20) that are coupled to the frame (10), and a turnbuckle (30) that connects the two lifting plates (20), wherein the manhole cover (90) is opened as the lifting plates (20) rise by shortening the turnbuckle (30). Background Technology

[0003] Manhole covers (90), which are mainly made of metal such as cast iron, are handled by manpower because, despite their heavy weight, traffic control and equipment mobilization are difficult due to the working conditions, which are mainly performed on roads.

[0004] In particular, due to the nature of the manhole cover (90) being installed in an open area such as a road, it is inevitably exposed to various pollutants as well as weather phenomena such as precipitation. As a result, the outer part of the manhole cover (90) becomes stuck to the manhole entrance, which frequently causes serious obstacles to the opening of the manhole cover (90).

[0005] Accordingly, a device of Patent No. 677909 was developed to open a manhole cover (90) by installing a movable structure on the upper part of the manhole and connecting the structure to the manhole cover (90), but the overall size of the device was substantial, so it lacked convenience for transportation and handling, and the upper support structure was structured to run on the ground, so it had limitations in terms of operational stability.

[0006] Subsequently, a tripod-type device of Patent No. 2539525 was developed to improve portability and ease of handling; however, this also had clear limitations in use, such as being substantial in size and requiring additional auxiliary equipment like magnetic capture means. The problem to be solved

[0008] Due to the lack of various performance characteristics, such as portability, ease of use, and stability, of the aforementioned conventional manhole cover (90) opening device, extremely simple equipment such as crowbars is currently being used at sites where manhole covers (90) need to be handled, and this is causing various problems.

[0009] First of all, although the crowbar has the advantage of being easy to carry and capable of manual work compared to other equipment, it inevitably lacks the force to open the manhole cover (90), so in the case of a manhole cover (90) that has been left unattended for a long time and has its outer part stuck to the manhole entrance, it inevitably takes a considerable amount of time and effort to open it.

[0010] In particular, since the force in the open direction can only be applied to one end of the manhole cover (90) with the crowbar, there is a fundamental problem in that the force is applied in a direction that closes the manhole cover (90) at the point opposite to the point of contact with the crowbar.

[0011] In addition, in the operation of the manhole cover (90) using a crowbar, since the opening force cannot be applied smoothly and properly controlled, there was a serious problem in that the manhole cover (90) was suddenly opened, and the manhole cover (90) itself as well as surrounding objects were thrown up, causing a constant risk of accidents. means of solving the problem

[0013] The present invention is devised to take into account the aforementioned problems, so that sufficient opening force can be applied to a manhole cover (90) even with a simple configuration that is easy to carry, and at the same time, the opening force can be distributed and applied to both sides of the manhole cover (90) rather than being limited to a specific point of the manhole cover (90), stable operation is possible while the main body of the equipment is fixed, and the opening force can be applied gradually rather than abruptly. In the manhole cover (90) opening device, the lower end of the end plate (14) of a frame (10), which is an inverted U-shaped plate chain with end plates (14) formed protruding downward at both ends of a horizontal plate (13), is seated on the upper part of the manhole, and a lifting plate (20) having a vertical elongated hole (21) and an inclined elongated hole (23) cut and formed inside is installed on the upper side of each of the end plates (14), wherein the lifting plates (20) on both sides have a vertical line passing through the center of the horizontal plate (13). The manhole cover opening device is characterized by being symmetrical with respect to an axis, wherein the longitudinal hole (21) of the lifting plate (20) is connected to a fixed shaft (11) formed at each end of the horizontal plate (13) so as to be freely movable, and a turnbuckle (30) is installed between the two lifting plates (20), wherein an active shaft (31) is formed at both ends of the turnbuckle (30), and the active shaft (31) is connected to a longitudinal hole (23) of the lifting plate (20) so as to be freely movable, and the two lifting plates (20) and the manhole cover (90) are connected, so that as the turnbuckle (30) shortens, the lifting plate (20) is raised and the manhole cover (90) is raised.

[0014] In addition, the present invention is a manhole cover opening device characterized in that a horizontal elongated hole (25) is cut and formed in the lower part of the lifting plate (20), a connecting plate (50) has a curved groove (55) formed in a recess on one side, a connecting shaft (51) is formed at the upper part of the connecting plate (50) so that the connecting shaft (51) can move freely in the elongated hole (25), and a locking shaft (41) is formed at the upper part of the binding plate (40), which is a plate chain connected to the manhole cover (90), so that the binding plate (40) and the lifting plate (20) are connected through the connecting plate (50) as the locking shaft (41) is connected to the curved groove (55). Effects of the invention

[0016] Through the present invention, sufficient opening force can be applied to the manhole cover (90) even with a simple configuration, and at the same time, the opening force can be distributed and applied to both sides of the manhole cover (90) rather than being limited to a specific point of the manhole cover (90).

[0017] In addition, the manhole cover (90) opening device of the present invention has the advantages of being simple in structure and easy to use, as well as being portable and easy to manufacture.

[0018] In particular, stable operation is possible while the main body of the equipment is fixed, and the opening force can be applied gradually rather than abruptly, so accidents that may occur during the opening of the manhole cover (90) can be prevented in advance. Brief explanation of the drawing

[0020] FIG. 1 is a perspective view of the present invention. FIG. 2 is a perspective view of the usage state of the present invention. FIG. 3 is a partially cut and exploded perspective view of the present invention. FIG. 4 is an exploded perspective view of an excerpt of the essential part of the present invention. FIG. 5 is an explanatory diagram of the operation method of the present invention. FIG. 6 is an explanatory diagram of the method of using the binding plate and connecting plate of the present invention. Specific details for implementing the invention

[0021] The detailed configuration and operating principle of the present invention are explained below with reference to the attached drawings.

[0022] First, FIG. 1 illustrates the external appearance and basic configuration of the present invention. As shown, the present invention comprises a frame (10) which is an inverted U-shaped plate, a pair of lifting plates (20) installed on both sides inside the frame (10), and a turnbuckle (30) connecting the two lifting plates (20).

[0023] As shown in FIG. 2, the present invention is a manhole cover (90) opening device in which a frame (10) is seated and mounted around a manhole cover (90) at the top of a manhole, and the manhole cover (90) and both lifting plates (20) are simultaneously connected and used, thereby raising the manhole cover (90) while simultaneously capturing both ends of the manhole cover (90) rather than just one end.

[0024] In the present invention, the two end plates (14) of the frame (10) serve as legs that support the device of the present invention. Since stable upright maintenance and distribution of the applied load are required for stable support of the configuration of the present invention, a flat plate (19) is formed at the bottom of the end plates (14).

[0025] That is, unlike conventional manhole cover (90) opening devices such as crowbars that raise specific points on the outer edge of the manhole cover (90), the present invention is a device that operates by capturing two points symmetrically aligned with the center of the circular manhole cover (90) as an axis and raising the two captured points simultaneously. It is not a device that moves the manhole cover (90) after opening it, but rather a device that performs the initial raising of the manhole cover (90) when it is too heavy to be raised by human power, or when the outer edge of the manhole cover (90) is stuck to the top of the manhole due to corrosion or contaminants.

[0026] FIGS. 3 and 4 are drawings illustrating each component of the present invention in detail. As shown in these drawings, the present invention is configured as a main body of an inverted U-shaped plate frame (10) formed by protruding downwards from both ends of a horizontal plate section (13) which is a horizontal plate section.

[0027] In addition, a trapezoidal plate body, the lifting plate (20), is formed by cutting into a vertical elongated hole (21) and an inclined elongated hole (23) inside, and is installed on the upper side of each of the two end plates (14), and the two lifting plates (20) are symmetrical with respect to a vertical line passing through the center of the transverse plate (13).

[0028] These lifting plates (20) are installed at the part where the horizontal plate (13) and the vertical plate (14) are connected, that is, at both ends of the horizontal plate (13) and the upper end of the vertical plate (14), and as shown in FIGS. 3 and 4, the vertical hole (21) of the lifting plate (20) is connected to the fixed shaft (11) formed at each end of the horizontal plate (13) so that it can freely slide.

[0029] In the frame (10), the portion where the fixed shaft (11) is formed is at both ends of the horizontal plate portion (13) and the upper end of the vertical plate portion (14). The fixed shaft (11) is installed in a direction perpendicular to the frame (10) plate body inside the inverted U-shaped frame (10). As illustrated in FIGS. 3 and 4, an inwardly protruding shaft support plate (15) is joined to the connection portion between the horizontal plate portion (13) and the vertical plate portion (14) of the frame (10), and the fixed shaft (11) is formed at the end of the shaft support plate (15). A shaft coupling plate (16) of the same shape as the shaft support plate (15) is joined to the end of the fixed shaft (11) that passes through the vertical hole (21) of the lifting plate (20), thereby preventing the fixed shaft (11) of the lifting plate (20) from coming off.

[0030] As shown in FIGS. 3 and 5, a turnbuckle (30) is installed between the two lifting plates (20) on the lower side of the horizontal plate (13) of the frame (10), and an active shaft (31) is formed at both ends of the turnbuckle (30), and the active shaft (31) is connected to the main hole (23) of the lifting plate (20) so as to be freely movable.

[0031] Additionally, the two lifting plates (20) are connected to the manhole cover (90). The connection between the lifting plates (20) and the manhole cover (90) can be achieved by connecting the lifting plates (20) to a through hole (91) formed in the manhole cover (90) through various rings, chains, or wires, or, in the case of a manhole cover (90) with a handle, the handle and the lifting plates (20) can be connected through the aforementioned rings or wires.

[0032] In addition, as illustrated in FIGS. 4 to 6, a horizontal elongated hole (25) is cut and formed in the lower part of the lifting plate (20), and a connecting shaft (51) is formed in the upper part of the connecting plate (50) in which a curved groove (55) is formed on one side so that the connecting shaft (51) can freely move in the flat elongated hole (25), and a locking shaft (41) is formed in the upper part of the binding plate (40), which is a plate body connected to the manhole cover (90), so that the connecting plate (40) and the lifting plate (20) are connected through the connecting plate (50) as the locking shaft (41) is connected to the curved groove (55).

[0033] As shown in FIG. 6, the binding plate (40) of the present invention has a curved portion (49) formed at a right angle at the lower end of the binding plate (40), which is a vertical plate body, and a curved surface formed at the lower and side portions of the curved portion (49) and at the connection portion between the curved portion (49) and the main body of the binding plate (40), so that the manhole cover (90) can be stably bound to the binding plate (40) without any separate binding or fastening work by simply inserting the binding plate (40) into the through hole (91) formed in the manhole cover (90) in an inclined position and then standing it up, as shown in the upper drawing of FIG. 6.

[0034] In addition, when connecting the binding plate (40) and the lifting plate (20), the locking shaft (41) at the upper end of the binding plate (40) may be directly connected to the flat hole (25) at the lower end of the lifting plate (20), but as shown in the lower drawing of FIG. 6, the lifting plate (20) and the binding plate (40) may also be connected through a connecting plate (50) in which a curved groove (55) is formed in one side.

[0035] Through an indirect connection between the lifting plate (20) and the connecting plate (40) via the connecting plate (50), the function of adjusting the connection distance between the lifting plate (20) and the connecting plate (40) can be performed. This can be achieved by selecting the curved groove (55) to which the locking shaft (41) of the connecting plate (40) is coupled, by forming and arranging the curved groove (55) formed in the connecting plate (50) in multiple stages, as exemplified in FIG. 6, etc.

[0036] In addition, regarding the connection between the binding plate (40) and the connecting plate (50), the connection of the curved groove (55) of the locking shaft (41) can be performed through a simple operation of tilting the binding plate (40), which is inserted into the through hole (91) of the manhole cover (90), using the upper outer edge of the through hole (91) as a support point and then standing it upright, as indicated by the dashed line in the lower drawing of FIG. 6. In order to correspond to the rotational standing of the binding plate (40) and the circular trajectory entry of the locking shaft (41), the curved groove (55) is also cut in a gentle circular curve shape. In particular, the curved groove (55) of the connecting plate (50) is formed so that the inner end portion has a lower height compared to the height of the entrance, so that the locking shaft (41) connected to the curved groove (55) does not easily detach.

[0037] Meanwhile, as shown in FIG. 4, in the connection between the flat hole (25) and the connecting shaft (51) or between the curved groove (55) and the locking shaft (41), a pin hole (71) is drilled in each shaft and a pin (72) is connected to the pin hole (71), thereby preventing axial deviation of each shaft.

[0038] The present invention with this configuration operates in such a way that, as shown in FIG. 5, the turnbuckle (30) is rotated so that the total length of the entire turnbuckle (30) is shortened, the lifting plate (20) is raised, and the manhole cover (90) connected to the lifting plate (20) is raised and opened.

[0039] That is, when the female screw in the center of the turnbuckle (30) is rotated and the male screws on both sides are brought close to each other, the entire length of the turnbuckle (30) is shortened, and the active shafts (31) at both ends of the turnbuckle (30) move horizontally toward the center of the frame (10). Even if the active shafts (31) that are connected to the longitudinal hole (23) of the lifting plate (20) move, the horizontal movement of the lifting plate (20) is constrained by the fixed shaft (11). As the active shafts (31) and the longitudinal hole (23) move together, the fixed shaft (11) and the longitudinal hole (21) also move together, causing the lifting plate (20) to rise.

[0040] At this time, the slant hole (23) formed in the lifting plate (20) is set so that the angle formed between the horizontal line and the slant hole (23) is less than 45 degrees, as illustrated in FIGS. 1 to 5, thereby performing a deceleration action in which the upward distance of the lifting plate (20) is reduced compared to the movement distance of the active axis (31), and thereby the upward force of the lifting plate (20) exceeding the contraction force of the turnbuckle (30) can be expressed.

[0041] In addition, regarding the operation of the turnbuckle (30) itself, the helical pitch between the male and female screws of the turnbuckle (30) is set densely, so that the extension and shortening are performed at a significantly reduced speed compared to the rotational movement of the turnbuckle (30), and thus the shortening force in the direction of shortening that significantly exceeds the rotational force can be said to be the inherent function of the turnbuckle (30).

[0042] Accordingly, in the present invention, the amplification effect generated from the turnbuckle (30) itself and the amplification effect generated from the upward operation of the lifting plate (20) are combined, so that the upward force of the manhole cover (90) is generated, making it possible to open the manhole cover (90) with even greater power. Explanation of the symbols

[0044] 10 : Frame 11 : Fixed axis 13 : Transverse plate section 14 : End plate 15 : Axle support plate 16: Shaft coupling plate 19: Grounding plate 20 : Lifting plate 21 : Jongjanggong 23 : CEO 25 : Pyeongjanggong 30 : Turnbuckle 31: Activity axis 40 : Binding plate 41 : Locking shaft 49 : Qufu 50 : Connection plate 51 : Connecting shaft 55 : Curved groove 71 : Pin ball 72 : Pin 90 : Manhole cover 91 : Communion

Claims

Claim 1 As a manhole cover (90) opening device, the lower end of the end plate (14) of a frame (10), which is an inverted U-shaped plate chain with end plates (14) formed protruding downward at both ends of a horizontal plate (13), is seated on the upper part of the manhole, and a lifting plate (20) having a vertical elongated hole (21) and an inclined elongated hole (23) cut and formed inside is installed on the upper side of each end plate (14), wherein the lifting plates (20) on both sides are symmetrical with respect to a vertical line passing through the center of the horizontal plate (13), and the elongated hole (21) of the lifting plate (20) is connected to a fixed shaft (11) formed at each end of the horizontal plate (13) so as to be freely movable, and a turnbuckle (30) is installed between the lifting plates (20), wherein an active shaft (31) is formed at both ends of the turnbuckle (30), and the active shaft (31) In a manhole cover opening device in which the lifting plate (20) is connected to the elongated hole (23) of the lifting plate (20) so as to be freely movable, and the lifting plates (20) on both sides and the manhole cover (90) are connected so as the turnbuckle (30) is shortened, the lifting plate (20) is raised and the manhole cover (90) is raised, wherein a horizontal elongated hole (25) is cut and formed in the lower part of the lifting plate (20); a connecting shaft (51) is formed at the upper end of a connecting plate (50) in which a curved groove (55) is recessed on one side so as to be freely movable and the connecting shaft (51) is connected to the elongated hole (25); and a locking shaft (41) is formed at the upper end of a binding plate (40), which is a plate chain connected to the manhole cover (90), so as the locking shaft (41) is connected to the curved groove (55), the binding plate (40) and the lifting plate (20) are connected through the connecting plate (50). Manhole cover opening device with binding plate application featuring connection.

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