work table

Abstract

A work table according to one embodiment of the present invention includes a top plate on which an object to be worked on can be placed, a fire extinguishing tank positioned below the top plate and capable of storing fire extinguishing liquid inside, and a handle unit that can open and close the top plate covering the open top surface of the fire extinguishing tank.

Description

Technical Field

[0001] [Cross - reference to Related Applications] This application claims the benefit of priority based on U.S. Patent Application No. 63 / 529,536 filed on July 28, 2023 and U.S. Patent Application No. 18 / 747,124 filed on June 18, 2024, and all the contents disclosed in the documents of the Korean patent application are included as part of this specification.

[0002] The present invention relates to a worktable, and more specifically, to a worktable equipped with a fire - fighting tank as a worktable on which work objects such as battery cells, battery modules, and battery packs can be placed for working or moving.

Background Art

[0003] In modern society, the use of portable devices such as mobile phones, notebook computers, video cameras, digital cameras, and energy storage systems (ESS) has become common, and the development of technologies in related fields has become active. In addition, rechargeable secondary batteries are used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), plug - in hybrid electric vehicles (P - HEVs), etc. as a solution to problems such as air pollution caused by existing gasoline vehicles that use fossil fuels, and the need for the development of secondary batteries is increasing.

[0004] Currently, commercially available secondary batteries include nickel - cadmium batteries, nickel - metal hydride batteries, nickel - zinc batteries, lithium secondary batteries, etc. Among these, lithium secondary batteries have the advantages of free charge and discharge, low self - discharge rate, and high energy density, and have received the most attention.

[0005] On the other hand, in various situations such as the manufacturing process of battery cells, battery modules, and / or battery packs, the transportation process of the final-produced battery cells, battery modules, and / or battery packs, or, in some cases, the actual use, inspection, and repair processes of the final-produced battery cells, battery modules, and / or battery packs, there is a need for a method that allows for easier movement of battery cells, battery modules, and / or battery packs while also enabling rapid suppression of fires in the event of thermal events such as fires. [Overview of the project] [Problems that the invention aims to solve]

[0006] The present invention aims to provide a work table on which work objects such as battery cells, battery modules, and battery packs can be placed, worked on, and moved.

[0007] Furthermore, the present invention aims to provide a work table that allows for the rapid and easy loading of the object into a fire extinguishing tank located at the bottom in the event of a thermal event such as a fire occurring to the object.

[0008] However, the problems that the embodiments of the present invention aim to solve are not limited to those described above, and can be extended in various ways within the scope of the technical ideas included in the present invention. [Means for solving the problem]

[0009] A work table according to one embodiment of the present invention may include a top plate on which an object to be worked on can be placed, a fire extinguishing tank positioned below the top plate and capable of storing fire extinguishing liquid inside, and a handle unit that can open and close the top plate covering the open top surface of the fire extinguishing tank.

[0010] The handle unit includes a handle portion and a guide shaft connected to the handle portion and capable of supporting the upper plate, and the lower surface of the upper plate may include a bearing member that can contact the guide shaft.

[0011] When the handle is pulled, the guide shaft supporting the upper plate moves forward and separates from the upper plate, thereby allowing the upper plate to move downward and the open top surface of the fire extinguishing tank to be opened.

[0012] The guide shaft can support one end of the upper plate, the opposite end of the upper plate is hinged to the upper end of the fire extinguishing tank, and the upper plate can rotate downward by at least 90 degrees around the hinged end.

[0013] The bearing member may be a ball bearing.

[0014] Multiple bearing members are provided, and these multiple bearing members can be arranged along the length of the guide shaft.

[0015] One end of the guide shaft is connected to the handle portion, and the other end of the guide shaft includes a bearing guide portion that can contact the bearing member and support the bearing member upward. The bearing guide portion is partially cut along the length of the guide shaft and may have a flat or concave shape.

[0016] The handle unit further includes a guide block that supports the guide shaft, the guide block being fixed to one end or near the upper end of the fire extinguishing tank and including a through hole through which the guide shaft can pass and move.

[0017] The guide block includes a locking member, and when the locking member of the guide block is locked, the end of the locking member contacts the guide shaft or is inserted into the guide shaft, fixing the guide shaft in place. After the locking member of the guide block is released, the guide shaft can move forward when the handle is pulled.

[0018] The handle unit further includes a stopper including a locking member and a stopper block supporting the stopper, the stopper block being fixed to or near one end of the upper end of the fire extinguishing tank and including a through hole through which the stopper can move, the locking member of the stopper being positioned to pass through the stopper and the stopper block when the locking member of the stopper is locked, and the guide shaft being able to move forward when the handle is pulled after the locking member of the stopper has been released.

[0019] The stopper is arranged parallel to the guide shaft and has a bar or rod shape. One end of the stopper is connected to the handle portion, and the other end of the stopper has a protruding end. The length of the cross-section of the protruding end may be greater than the length of the cross-section of the through hole in the stopper block.

[0020] The system further includes wheels for movement provided at the lower end of the fire extinguishing tank, and when the locking member of the stopper is locked, the work table can be moved when the handle is pulled or pushed.

[0021] The longitudinal direction of the guide shaft can be perpendicular to the extension direction of one end of the upper plate.

[0022] Multiple sets of the guide shafts and bearing members are provided, and the handle portion connected to the multiple guide shafts may have a bar shape that is positioned parallel to one end of the upper plate.

[0023] The system further includes a front wall positioned at the front end of the upper plate, and the height of the upper end of the front wall may be greater than the height of the upper plate.

[0024] The lower end of the fire extinguishing tank may further include a pipe for discharging the fire extinguishing liquid and a valve connected to the pipe.

[0025] The work object can include at least one of a battery cell, a battery module, and a battery pack.

Advantages of the Invention

[0026] According to the present invention, work objects such as battery cells, battery modules, and battery packs can be placed and worked on, or moved.

[0027] Further, according to the present invention, when a thermal event such as a fire occurs in the object, the object can be quickly and easily put into a fire extinguishing tank provided below the object.

[0028] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Brief Description of the Drawings

[0029] [Figure 1] It is a perspective view of a work table according to an embodiment of the present invention. [Figure 2] It is a view of one use state of the work table of FIG. 1, showing the case where an object is placed on the work table. [Figure 3] It is another use state view of the work table of FIG. 1, showing the case where the table descends and the upper surface of the fire extinguishing tank is opened. [Figure 4] It is still another use state view of the work table of FIG. 1, showing the case where the table rises upward and the upper surface of the fire extinguishing tank is opened. [Figure 5] It is an exploded perspective view of a part of the work table of FIG. 1. [Figure 6] It shows the operation between the guide shaft and the bearing member of the work table of FIG. 1. [Figure 7] It is a top view of the work table of FIG. 1, showing the case where the upper surface of the fire extinguishing tank is opened. [Figure 8]Figure 1 is a top view of the work table, showing the case where the top of the fire extinguishing tank is closed. [Figure 9] Figure 1 is a front view of the work table. [Figure 10] This is a rear view of the work table shown in Figure 1. [Figure 11] This is a side view of the work table shown in Figure 1. [Figure 12] Figure 1 is a rear perspective view of the work table. [Figure 13] Figure 1 is a reference diagram of the work table. [Modes for carrying out the invention]

[0030] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings, so that those with ordinary skill in the art to which the present invention pertains can easily implement it. The present invention can be implemented in a variety of different forms and is not limited to the embodiments described herein.

[0031] To clearly explain the present invention, irrelevant parts have been omitted, and the same or similar reference numerals have been used throughout the specification for identical or similar components.

[0032] Furthermore, the dimensions and thicknesses of each component shown in the drawings are arbitrarily indicated for the sake of explanation, and therefore the present invention is not necessarily limited to those shown. In the drawings, the thicknesses are exaggerated to clearly represent multiple layers and regions. Also, in the drawings, the thicknesses of some layers and regions are exaggerated for the sake of explanation.

[0033] Furthermore, when a layer, membrane, region, plate, or other part is "on top of" or "on above" another part, this includes not only when it is "directly above" the other part, but also when there is another part in between. Conversely, when we say that one part is "directly above" another part, it means that there is no other part in between. Also, when we say that a part is "on top of" or "on above" a reference part, it means that it is located above or below the reference part, and does not necessarily mean that it is located "on top of" or "onwards" in the opposite direction of gravity.

[0034] Furthermore, throughout the specification, when a part "includes" a certain component, unless otherwise stated, it means that it may include other components rather than excluding them.

[0035] Furthermore, throughout the specification, "on a plane" means when the subject is viewed from above, and "on a cross-section" means when the cross-section of the subject is viewed from the side after being cut vertically.

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0037] Figure 1 is a perspective view of a work table (workbench) 10 according to one embodiment of the present invention. Figures 2 to 4 are diagrams showing the work table 10 of Figure 1 in use. Figure 2 shows the case where an object 1 is placed on the work table 10 of Figure 1. Figure 3 shows the case where the top plate 100 of the work table 10 of Figure 1 is lowered and the top surface of the fire extinguishing tank 200 is opened. Figure 4 shows the case where the top plate 100 of the work table 10 of Figure 1 is raised and the top surface of the fire extinguishing tank 200 is opened.

[0038] A work table 10 according to one embodiment of the present invention includes a top plate 100 on which a work object 1 is placed, a fire extinguishing tank 200 positioned below the top plate 100, and a handle unit 300 for transporting / moving the work table 10 and opening and closing the top plate 100. The work object 1 may be, for example, a battery cell, a battery module, and / or a battery pack, and the present invention is not limited to what has been described above.

[0039] As shown in Figure 2, the worker can perform tasks with the object 1 placed on the top plate 100, or the work table 10 can be moved with the object 1 placed on top. The top plate 100 may be, for example, a flat plate shape, and it is sufficient as long as it has sufficient rigidity to support the object 1, such as a battery module or battery pack.

[0040] The end of the top plate 100 that is located on the back side of the work table 10 is fixed to the top of the fire extinguishing tank 200 by a hinge 110 (see Figure 4). The portion of the top plate 100 that is located on the front side of the work table 10 is supported by the guide shaft 320 of the handle unit 300. The handle unit 300, including the guide shaft 320, will be described in more detail later.

[0041] A fire extinguishing tank 200 is provided below the upper plate 100. Fire extinguishing liquid is stored in the fire extinguishing tank 200. There are no restrictions on the type of fire extinguishing liquid; it is sufficient if it can extinguish a fire in the event of a fire in the target object 1, such as a battery cell, battery module, and / or battery pack, for example, it may be cooling water or salt water.

[0042] The fire extinguishing tank 200 has an open top surface, and the open top surface of the fire extinguishing tank 200 can be covered with the top plate 100. The fire extinguishing tank 200 may include, for example, a frame 210 that constitutes the skeleton of the fire extinguishing tank 200 and a plate 220 that covers the open surface between the frame 210 (see Figure 13) and is closely bonded to the frame 210. In this case, a sealing member (not shown) may be further provided in the portion bonded between the frame 210 and the plate 220 to prevent leakage of fire extinguishing liquid. The present invention is not limited to the above, and the fire extinguishing tank 200 may also have the shape of a water tank or storage tank with an open top surface, as long as it has a structure that can support the top plate 100 and the object 1 on the top plate 100 while storing fire extinguishing liquid inside, and various modifications and changes are possible.

[0043] The fire extinguishing tank 200 can be made of metal or hard plastic. In some cases, it is possible to make changes such as making the frame 210 out of metal and the plate 220 out of plastic. If the fire extinguishing liquid is saltwater, hard plastic can be used to prevent corrosion of the fire extinguishing tank 200, but if metal is used, a coating layer can be provided to prevent corrosion, and in some cases, the exterior of the fire extinguishing tank 200 can be made of metal and the interior out of plastic, and various other modifications and changes are possible.

[0044] The fire extinguishing tank 200 is connected to a pipe 230 that can drain the fire extinguishing liquid inside the fire extinguishing tank 200, and the pipe 230 is equipped with a valve 240 that can open and close the pipe 230.

[0045] On the other hand, as shown in Figures 1 and 2, the open top surface of the fire extinguishing tank 200 is covered by the top plate 100. Furthermore, as shown in Figures 3 and 4, the top plate 100 covering the top surface of the fire extinguishing tank 200 can be opened and closed. This allows the top surface of the fire extinguishing tank 200 to be opened.

[0046] When the operator pulls the handle portion 310 of the handle unit 300, the guide shaft 320 connected to the handle portion 310 moves and separates from the upper plate 100. As a result, it no longer supports the upper plate 100, and as shown in Figure 3, the upper plate 100 falls downward in the direction of gravity. At this time, the rear end of the upper plate 100 is still fixed by the hinge 110 (see Figure 4), so the rear end of the upper plate 100 remains fixed, and the upper plate 100 rotates around the rear end as the axis of rotation, falling into the fire extinguishing tank 200. At this time, the object 1 placed on the upper plate 100 also falls into the fire extinguishing tank 200 due to gravity.

[0047] Under normal conditions, the open top surface of the fire extinguishing tank 200 is covered by the top plate 100, that is, the top plate 100 is positioned horizontally, allowing workers to place objects 1, such as battery modules or battery packs, on the top plate 100 and perform tasks or move the objects 1. In an emergency, for example, if a thermal event (such as a fire) occurs in the object 1, since fire extinguishing liquid is stored inside the fire extinguishing tank 200, the top surface of the fire extinguishing tank 200 can be opened as shown in Figure 3, allowing the object 1 to quickly fall into the fire extinguishing tank 200 and extinguish the fire.

[0048] Referring to Figure 4, the top plate 100 and the fire extinguishing tank 200 are hinged together by a hinge 110. For a more robust connection and support, the top plate 100 can be connected to the frame 210 of the fire extinguishing tank 200 by the hinge 110. The hinge 110 is capable of rotating at least 80 degrees, and can rotate up to 180 degrees, as shown in Figures 3 and 4, and in some cases can rotate from an angle greater than 180 degrees up to 360 degrees. If the hinge 110 is capable of rotating at least 180 degrees, the top plate 100 can rotate downward to open the fire extinguishing tank 200, as shown in Figure 3, and the top plate 100 can rotate upward to open the fire extinguishing tank 200, as shown in Figure 4.

[0049] For example, as shown in Figure 4, when the top plate 100 rotates upward and the fire extinguishing tank 200 is open, fire extinguishing liquid can be supplied into the fire extinguishing tank 200. If the hinge 110 can only be opened to about 90 degrees, as shown in Figure 3, fire extinguishing liquid can also be supplied into the fire extinguishing tank 200 when the top plate 100 rotates downward and the fire extinguishing tank 200 is open.

[0050] Referring again to Figure 1, a front wall 120 is provided at the front end of the top plate 100. The front wall 120 can also be located at the top of the fire extinguishing tank 200. The height of the top of the front wall 120 may be the same as the height of the top plate of the top plate 100, or it may be higher. If the height of the top of the front wall 120 is higher than the height of the top plate of the top plate 100, it is possible to prevent the object 1 from falling towards the worker. This prevents the object 1 from falling towards the worker during normal operation. Moreover, most importantly, in an emergency, even if the top plate 100 rotates downward and the object 1, which is on fire or otherwise, rotates with it and rolls towards the worker, the object 1 will hit the front wall 120, thus preventing the object 1 from falling towards the worker. The front wall 120 may be provided with at least one support member 121 that supports the front wall 120 and is provided in a direction perpendicular to the extension direction of the front wall 120. Furthermore, a handle unit 300 can be attached to the front wall 120, which will be described later.

[0051] Furthermore, a sealing curtain 140 (see Figure 4) can be provided along the front edge of the top plate 100. The size of the top plate 100 is approximately the same as the size of the open top surface of the fire extinguishing tank 200, but the size of the top plate 100 may be smaller than the size of the open top surface of the fire extinguishing tank 200. This is to prevent a situation in which the top plate 100 is trapped between the open top surface of the fire extinguishing tank 200 and cannot fall when it rotates downward and falls into the fire extinguishing tank 200. As a result, a gap may exist between the top plate 100 and the open top surface of the fire extinguishing tank 200, and such a gap can be covered by the sealing curtain 140.

[0052] Furthermore, or as an alternative, side walls 130 can be provided at the ends on both sides of the top plate 100. The side walls 130 can also be located at the upper end of the fire extinguishing tank 200. If the height of the upper end of the side wall 130 is higher than the height of the top plate of the top plate 100, it is possible to prevent the object 1 from falling outside the work table 10. The side wall 130 may be provided with at least one support member 131 that supports the side wall 130, provided in a direction perpendicular to the extension direction of the side wall 130.

[0053] Furthermore, or as an alternative, although not shown in the drawings of the present invention, a rear wall (not shown) may also be provided at the rear end of the top plate 100.

[0054] The opening and closing operation of the top plate 100 will be explained in detail below with reference to Figures 4 to 8.

[0055] Figure 4 shows the case where the top plate 100 rotates upward, opening the top surface of the fire extinguishing tank 200, as described above. Figure 5 is an exploded perspective view of a part of the work table 10 in Figure 1. Figure 6 is a diagram showing the movement between the guide shaft 320 and the bearing member 340 of the work table in Figure 1. Figure 7 is a top view of the work table 10 in Figure 1, showing the case where the top surface of the fire extinguishing tank 200 is open. Figure 8 is a top view of the work table 10 in Figure 1, showing the case where the top surface of the fire extinguishing tank 200 is closed.

[0056] The handle unit 300 is positioned on the front of the work table 10. For example, the handle unit 300 can be provided on the upper end side of the fire extinguishing tank 200. The handle portion 310 can be positioned at the front end of the top plate 100, and may be, for example, a bar shape arranged parallel to the front end of the top plate 100. The worker can also move the work table 10 by gripping the handle portion 310 of the handle unit 300, and in an emergency, the lock member 351 of the stopper 350 can be released (by removing the safety pin), and the handle portion 310 can be pulled to open the top surface of the fire extinguishing tank 200 as described above in Figure 3.

[0057] At least one guide shaft 320 is connected to the handle portion 310. The guide shaft 320 supports the handle portion 310 and simultaneously guides the direction of movement of the handle portion 310 (see arrow in Figure 4).

[0058] As shown in Figures 4, 5 to 8, one end of the guide shaft 320 is connected to the handle portion 310, and the other end of the guide shaft 320 can project toward the upper plate 100, using the front end of the upper plate 100 as a reference, and support the upper plate 100. Specifically, the guide shaft 320 projects into the fire extinguishing tank 200 with respect to the front end of the upper plate 100 (see Figure 7). As a result, the upper plate 100 is supported on the other end of the guide shaft 320 (see Figure 8). The extension direction (length direction) of the guide shaft 320 can be perpendicular to the extension direction of the front end of the upper plate 100.

[0059] The guide shaft 320 may be at least one, and in the embodiments of the present invention, an example is shown in which there are two on each side with respect to the stopper 350 located in the center. The number of guide shafts 320 is not particularly limited, and it is sufficient as long as they allow for easy movement of the handle portion 310 and horizontal support of the upper plate 100. Furthermore, the guide shaft 320 may be cylindrical or columnar as shown in the present invention, but the present invention is not limited thereto, and it is sufficient as long as it has a bar shape.

[0060] The other end of the guide shaft 320 contacts the bearing member 340 on the lower surface of the upper plate 100. The other end of the guide shaft 320 includes a bearing guide portion 321 to ensure stable contact with the bearing member 340. The bearing member 340 is supported on the bearing guide portion 321. The bearing guide portion 321 may have a step by being partially cut along the length of the guide shaft 320. The bearing guide portion 321 may have a flat shape or a concave shape that generally matches the outer surface of the bearing member 340.

[0061] Referring to Figures 5 and 6, for example, if the guide shaft 320 is cylindrical, the bearing guide portion 321 has a planar shape, so that even if the guide shaft 320 comes into contact with the bearing member 340, which is a ball bearing, the bearing member 340 can be stably supported on the bearing guide portion 321 of the guide shaft 320. This prevents the bearing member 340 from sliding laterally off the guide shaft 320.

[0062] Furthermore, referring to Figures 6(a) to 6(c), under normal conditions, the bearing member 340 is supported on the bearing guide portion 321 of the guide shaft 320, as shown in Figure 6(a). That is, the guide shaft 320 supports the upper plate 100 with the bearing member 340 interposed between them. The bearing member 340 should have sufficient rigidity to support the upper plate 100 and the object 1 placed on the upper plate 100, and should be made of a corrosion-resistant material. The bearing member 340 can be made of, for example, metal or high-strength plastic, and can be made of, for example, stainless steel.

[0063] On the other hand, in an emergency, if the handle 310 is pulled to advance the guide shaft 320, and the bearing member 340 is not provided, the guide shaft 320 will bear the full load of the upper plate 100 and the object 1, such as the battery module or battery pack on the upper plate 100, due to the frictional force between the guide shaft 320 and the upper plate 100. This makes it difficult for the operator to pull the handle 310, resulting in the problem of not being able to quickly extinguish the fire on the object 1.

[0064] However, according to the present invention, as shown in Figures 6(b) and (c), the bearing member 340 allows the guide shaft 320 to easily move toward the front of the work table 10 due to rolling friction between the guide shaft 320 and the upper plate 100. In other words, the operator can pull the handle 310 without applying much force to release the state in which the guide shaft 320 was supporting the upper plate 100. As a result, the top surface of the fire extinguishing tank 200 can be easily opened, and the object 1 on the upper plate 100 where a fire has occurred can be quickly thrown into the fire extinguishing liquid of the fire extinguishing tank 200.

[0065] The bearing member 340 may be, for example, a ball bearing. Alternatively, the bearing member 340 may be, for example, a plurality of ball bearings arranged in a row, as shown in the drawings of the present invention. When the bearing member 340 (for example, a plurality of ball bearings) is arranged along the length of the guide shaft 320, the forward movement of the guide shaft 320 can be made easier. However, the present invention is not limited to what is shown, and the number of ball bearings can be changed, and various modifications and changes are possible, such as arranging the bearing member 340 in multiple rows, as long as all of them can be placed on the bearing guide portion 321 of the guide shaft 320.

[0066] Referring again to Figure 5, the guide shaft 320 can be supported by the guide block 330. The guide block 330 includes a through hole, and the guide shaft 320 is positioned to pass through the through hole 331 of the guide block 330. This allows the guide shaft 320 to be stably supported without swinging in the vertical or horizontal directions.

[0067] The handle unit 300, including the handle section 310, guide shaft 320, and guide block 330, can be fixedly installed on or near the upper end of the fire extinguishing tank 200. For example, it can be installed on the upper side of the fire extinguishing tank 200 itself, or on the front wall 120 (see Figure 4). It can also further include a guide block support wall 370 (see Figure 4) that supports the guide block 330 from below. The guide block support wall 370 can be positioned on the upper end of the fire extinguishing tank 200, and in particular, on the front side of the work table 10. It is sufficient that the handle unit 300 is installed in a position where the guide shaft 320 can support the upper plate 100, and various modifications and changes are possible.

[0068] The guide block 330 may further include a locking member 332. Under normal conditions, it is desirable that the entire work table 10 moves when the operator pulls the handle 310. If only the handle 310 and the guide shaft 320 move forward independently, the top surface of the fire extinguishing tank 200 will be opened as described above. That is, under normal conditions, even if the operator pulls the handle 310, the guide shaft 320 must be fixed to the guide block 330. For this reason, the guide block 330 may further include a locking member 332. Under normal conditions, the locking member 332 can be locked by having its end contact the guide shaft 320 in the through hole 331 of the guide block 330, or by being inserted into the guide shaft 320 and firmly holding it, thereby preventing unintended movement of the guide shaft 320. In an emergency, the locking member 332 on the guide block 330 can be rotated or pulled to release the lock on the guide shaft 320, allowing the guide shaft 320 to move forward.

[0069] Furthermore, the work table 10 according to an embodiment of the present invention is further equipped with a stopper 350 to prevent the guide shaft 320 from moving unintentionally (forward or backward) during normal operation. The stopper 350 has a bar or rod shape, is arranged parallel to the guide shaft 320, and can be coupled to the handle portion 310. The stopper 350 is inserted into the through hole 361 of the stopper block 360. The locking member 351 can be manufactured, for example, in the shape of a pin or a rod. The locking member 351 can pass through the stopper block 360 and the stopper 350 inserted into the through hole 361 of the stopper block 360 to fix them together. At this time, the extension direction of the locking member 351 can be perpendicular to the extension direction of the stopper 350. During normal operation, since the locking member 351 passes through and fixes both the stopper 350 and the stopper block 360, the stopper 350 is fixed to the stopper block 360 and cannot move. As a result, the handle portion 310 and the guide shaft 320 cannot move independently together with the stopper 350.

[0070] In an emergency, if the operator unlocks the locking member 351 (for example, by removing a pin-shaped or rod-shaped locking member 351, i.e., by separating the locking member 351 from the stopper 350), the stopper 350 becomes movable within the stopper block 360. As a result, when the operator pulls the handle portion 310, the guide shaft 320 can move forward within the guide block 330. The upper end of the locking member 351 is provided with, for example, a ring, which the operator can grasp and pull out. However, the present invention is not limited thereto, and the shape of the locking member 351 can be modified in various ways.

[0071] On the other hand, one end of the stopper 350 is connected to the handle portion 310, and the other end of the stopper 350 includes a protruding end 352. The cross-sectional length (diameter) of the protruding end 352 is larger than the cross-sectional length (diameter) of the stopper 350. More specifically, the cross-sectional length (diameter) of the protruding end 352 is larger than the cross-sectional length (diameter) of the stopper 350 positioned in the through hole 361 of the stopper block 360. As a result, when the operator pulls the handle portion 310, the protruding end 352 of the stopper 350 comes into contact with the stopper block 360, preventing the stopper 350 from moving forward any further. This prevents the handle portion 310, the guide shaft 320 connected to the handle portion 310, and the stopper 350 from completely coming out of the work table 10.

[0072] Figure 9 is a front view of the work table 10 shown in Figure 1. Figure 10 is a rear view of the work table 10 shown in Figure 1. Figure 11 is a side view of the work table 10 shown in Figure 1. Figure 12 is a rear perspective view of the work table 10 shown in Figure 1. Figure 13 is a reference diagram of the work table 10 shown in Figure 1.

[0073] Referring to Figures 9 to 13, the lower end of the fire extinguishing tank 200 may be further equipped with wheels 250 that can move the work table 10 and / or floor stoppers 260 that can fix the work table 10 to the floor. Since the pedal of the floor stopper 260 can be moved up and down by the worker, the work table 10 can be fixed to the floor with the floor stopper 260 during work and released when moving the work table 10.

[0074] According to the above-described embodiment of the present invention, an object 1 such as a battery cell, battery module, or battery pack can be placed on the work table 10 for work or movement. Furthermore, if a thermal event such as a fire occurs to the object 1, it can be easily and simply placed into the fire extinguishing tank provided at the bottom of the work table 10 to quickly extinguish the fire.

[0075] Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto. Various modifications and improvements made by those skilled in the art, utilizing the basic concepts of the present invention as defined in the following claims, also fall within the scope of the present invention. [Explanation of Symbols]

[0076] 1. Object 10 Work Tables 100 Top board 110 Hinge 120 Front wall 121 Support member 130 Side wall 131 Support member 140 Ceiling Curtain 200 fire extinguishing tanks 210 frames 220 Plate 230 Piping 240 valves 250 wheels 260 Floor Stopper 300 Handle Unit 310 Handle section 320 Guide Shaft 330 Guide Block 340 Bearing components 350 Stopper 351 Locking member 360 Stopper Block 370 Guide block support wall

Claims

1. On the work table, A top plate on which the workpiece can be placed, A fire extinguishing tank is positioned below the aforementioned upper plate and stores fire extinguishing liquid inside, and A work table including a handle unit for opening and closing the top plate that covers the open top surface of the fire extinguishing tank.

2. The handle unit includes a handle portion and a guide shaft connected to the handle portion and capable of supporting the upper plate. The work table according to claim 1, wherein the lower surface of the upper plate includes a bearing member that can contact the guide shaft.

3. The work table according to claim 2, wherein when the handle is pulled, the guide shaft supporting the upper plate moves forward and separates from the upper plate, thereby moving the upper plate downward and opening the open top surface of the fire extinguishing tank.

4. The guide shaft can support one end of the upper plate. The opposite end of the upper plate is hinged to the upper end of the fire extinguishing tank. The work table according to claim 2 or 3, wherein the upper plate is rotatable downward by at least 90 degrees about the hinged end as an axis.

5. The work table according to claim 2 or 3, wherein the bearing member is a ball bearing.

6. The bearing members are provided in multiple quantities, The work table according to claim 2 or 3, wherein the plurality of bearing members are arranged along the length of the guide shaft.

7. One end of the guide shaft is connected to the handle portion. The other end of the guide shaft includes a bearing guide portion that can contact the bearing member and support the bearing member. The work table according to claim 2 or 3, wherein the bearing guide portion is partially cut along the length of the guide shaft to have a flat or concave shape.

8. The handle unit further includes a guide block that supports the guide shaft, The work table according to claim 2 or 3, wherein the guide block is fixed to one end of the upper end of the fire extinguishing tank or near thereto and includes a through hole through which the guide shaft passes and moves.

9. The guide block includes a locking member, When the locking member of the guide block is locked, the end of the locking member contacts the guide shaft or is inserted into the guide shaft, thereby fixing the guide shaft. The work table according to claim 8, wherein the guide shaft moves forward when the handle portion is pulled after the locking member of the guide block is released.

10. The aforementioned handle unit is: Stopper including locking member; and The system further includes a stopper block that supports the stopper, The stopper block is fixed to one end of the upper end of the fire extinguishing tank or near thereto, and includes a through hole through which the stopper can move. When the locking member of the stopper is locked, the locking member of the stopper is positioned to penetrate the stopper and the stopper block. The work table according to claim 2 or 3, wherein the guide shaft moves forward when the handle portion is pulled after the locking member of the stopper is released.

11. The stopper is positioned parallel to the guide shaft and has a bar or rod shape. The work table according to claim 10, wherein one end of the stopper is connected to the handle portion, the other end of the stopper has a protruding end, and the length of the cross-section of the protruding end is greater than the length of the cross-section of the through hole of the stopper block.

12. The fire extinguishing tank further includes wheels for transport provided at the lower end, The work table according to claim 10, wherein when the locking member of the stopper is locked, the work table can be moved by pulling or pushing the handle portion.

13. The work table according to claim 2 or 3, wherein the longitudinal direction of the guide shaft is perpendicular to the extension direction of one end of the upper plate.

14. The set of the guide shaft and the bearing member is provided in multiple units. The work table according to claim 2 or 3, wherein the handle portion connected to a plurality of guide shafts has a bar shape arranged parallel to one end of the upper plate.

15. The upper plate further includes a front wall positioned at the front end, The work table according to claim 2 or 3, wherein the height of the upper end of the front wall is higher than the height of the top plate.

16. A work table according to any one of claims 1 to 3, further comprising a pipe for discharging the fire extinguishing liquid and a valve connected to the pipe at the lower end of the fire extinguishing tank.

17. The work table according to any one of claims 1 to 3, wherein the work object includes at least one of a battery cell, a battery module, and a battery pack.

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