Inspection box

Abstract

To provide an inspection box that allows easy maintenance of a cable, for example, in the inspection box, dispenses with the need for separate manufacturing of a structural block for fitting a lid body for the inspection box, thereby saving labor and cost, and achieves improved safety by easily fitting and fixing the lid body to a box body, with a structure not allowing easy opening / closing of the lid body.SOLUTION: An inspection box has a square cylindrical box body 2 having multiple side walls 5 and an open upper face, at least a pair of lid body fitting members 3 in the side wall lateral direction and fitted from an upper end face side of the box body 2 to a lower end face side, and a lid body 4 placed on an upper face of the box body 2 and openably / closably fitted to the lid body fitting members 3.SELECTED DRAWING: Figure 6

Description

Technical Field

[0006] , ,

[0001] The present invention relates to an inspection box such as a handhole, which is used to store a group of communication cables laid in the vicinity of a railway line or the like, is used for changing the direction or step of a cable trough or other pipeline, and is used as an inspection port when inspecting the stored group of communication cables.

Background Art

[0002] A handhole is used for relaying for inserting and removing cables, and is basically installed at a branch portion of a cable or a portion where a cable bends.

[0003] For example, when wiring a cable in an underground buried pipe, if the laying distance becomes long, it becomes difficult to draw the cable through, and there is a problem that maintenance of cable replacement also becomes difficult. In addition, when something goes wrong with the cable, since the cause can only be confirmed at the end of the cable, there is also a problem that maintenance is hindered when the laying distance becomes long.

[0004] In order to solve these problems, by installing handholes at predetermined intervals, branch points, locations where cables bend, etc., it is not necessary to wire the cable over a long distance at once, and even when a problem occurs, it becomes easy to investigate the cause, and the maintenance is significantly improved.

[0005] By the way, a lid for the handhole is attached to the handhole to protect the cables and equipment wired inside the handhole. The lid for the handhole has a set breaking load, and a strength is required such that it is not broken when a heavy object is placed on the upper part of the handhole. Conventionally, it is manufactured with a structure for installing a lid on the handhole provided in advance, or there is something like simply placing a lid made of iron provided with a handle on the handhole.

[0006] However, the former method requires the separate fabrication of a block with a structure that allows for the installation of a lid, which presents challenges in terms of time and cost. Furthermore, the latter method, which simply places the lid on top of the handhole, does not securely fasten to the handhole, raising safety concerns.

[0007] Furthermore, since the covers for handholes can be easily opened and closed by anyone with a hook or similar tool, measures are being considered to prevent them from being easily opened for security reasons, such as the theft of cables inside the handholes. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Utility Model Publication No. 6-5336 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Thus, the present invention was devised to solve the aforementioned conventional problems, and aims to provide an inspection box in which maintenance of, for example, cables inside the inspection box can be easily performed, there is no need to separately manufacture a structural block for attaching the lid for the inspection box, thereby reducing time and cost, safety is improved by the fact that the lid can be easily attached and fixed to the box body, and the lid is configured so that it cannot be easily opened or closed. [Means for solving the problem]

[0010] The present invention It comprises a box body having multiple side walls and forming a rectangular tube shape with an open top surface, a lid mounting member provided in at least one pair in the width direction of the side walls, attached to the box body from the upper end surface to the lower end surface of the side walls, and a lid placed on the top surface of the box body and attached to the lid mounting member so as to be openable and closable, The lid mounting member has an upper locking portion that straddles the upper end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; a lower locking portion that straddles the lower end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; and a connecting plate portion that connects the upper locking portion and the lower locking portion. A first connecting cylinder extending horizontally is provided on the tip side of the upper locking portion. The lid is attached between the first connecting cylinders of the pair of lid mounting members and has a second connecting cylinder having a through hole that connects to an insertion hole provided in the first connecting cylinder. A connecting rod is inserted through the holes of the first connecting cylinder and the second connecting cylinder, and the box is attached to the box body in a manner that allows it to be opened and closed. It is characterized by the following: or It comprises a box body having multiple side walls and forming a rectangular tube shape with an open top surface, a lid mounting member provided in at least one pair in the width direction of the side walls, attached to the box body from the upper end surface to the lower end surface of the side walls, and a lid placed on the top surface of the box body and attached to the lid mounting member so as to be openable and closable, The lid mounting member has an upper locking portion that straddles the upper end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; a lower locking portion that straddles the lower end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; and a connecting plate portion that connects the upper locking portion and the lower locking portion. A first connecting cylinder extending horizontally is provided on the tip side of the upper locking portion. The upper locking portion of the lid mounting member is fitted into the upper end surface of the side wall of the box body, and the connecting plate portion is brought into contact with the inner surface of the side wall. The elastic hook portion provided at the tip of the lower locking portion is pressed, allowing the lower locking portion to move along the lower end surface of the side wall toward the outer surface of the side wall. After movement, the tip of the elastic hook portion locks into the outer surface of the side wall, thereby attaching the lid mounting member. The lid is attached between the first connecting cylinders of the pair of lid mounting members and has a second connecting cylinder having a through hole that connects to an insertion hole provided in the first connecting cylinder. A connecting rod is inserted through the holes of the first connecting cylinder and the second connecting cylinder, and the box is attached to the box body in a manner that allows it to be opened and closed. It is characterized by the following: or The pair of lid mounting members are attached to opposing side walls, and the attached lid mounting members are connected to the lid segments that constitute the lid, so that the lid formed by the lid segments can be opened and closed like double doors. It is characterized by the following: or A locking mechanism is provided in a recess that is recessed inward towards the box body at approximately the center of the contact surface of the tip of the lid section, and the lid can be locked with a key at this locking mechanism, thus preventing it from being opened or closed. It is characterized by the following: [Effects of the Invention]

[0011] According to the present invention, maintenance of items such as cables inside the inspection box can be easily performed, there is no need to separately manufacture a structural block for attaching the lid to the inspection box, thus saving time and cost, and safety is improved by the fact that the lid can be easily attached and secured to the box body. Furthermore, the lid is configured so that it cannot be easily opened or closed, thus providing excellent advantages. [Brief explanation of the drawing]

[0012] [Figure 1] This is an explanatory diagram illustrating the configuration of the box body according to the present invention. [Figure 2] This is an explanatory diagram illustrating the configuration of the lid mounting member according to the present invention. [Figure 3] This is a schematic diagram (part 1) showing the configuration when the lid mounting member is attached to the box body. [Figure 4] This is a schematic diagram (part 2) showing the configuration when the lid mounting member is attached to the box body. [Figure 5] This is an explanatory diagram illustrating the structure of the lid division according to the present invention. [Figure 6]This is a schematic configuration diagram for explaining the configuration of an embodiment according to the present invention.

Embodiments for Carrying Out the Invention

[0013] Hereinafter, the present invention will be described based on the drawings. As shown in FIG. 6, the inspection box 1 of the present invention includes a box body 2 with an open top surface, a lid mounting member 3 attached to the box body 2, and a lid 4 placed on the top surface of the box body 2.

[0014] First, the box body 2 will be described based on the drawings. FIG. 1(a) is a front view showing the box body 2 from the front, FIG. 1(b) is a left side view showing the box body 2 from the left side, and FIG. 1(c) is a plan view looking down on the box body 2 from above.

[0015] The box body 2 has a plurality of side walls 5 and has a rectangular tube shape. As shown in FIG. 1(c), in this embodiment, a box body 2 having a square tube shape formed by four side walls 5 is used.

[0016] As can be understood from FIG. 1(c), a vertically continuous vertically planar surface forming portion 6 is formed inside the corner portions of the box body 2. The inspection box 1 of the present invention can be used by stacking a plurality of the box bodies 2 in the height direction according to the needs of the laying location. When firmly fixing the stacked plurality of box bodies 2 to each other, for example, a plate such as a metal plate is applied to the vertically planar surface forming portion 6 at the boundary between the box body 2 and the box body 2 to fix the box bodies 2 to each other, thereby preventing the inspection box 1 from collapsing.

[0017] Furthermore, a corner protrusion 7 is formed on the outer side of the upper corner of the box body 2, extending upward and being one step higher than the upper end surface of the side wall. This corner protrusion 7 serves as a guide when attaching the lid 4, which will be described later, and also prevents the lid 4 from shifting to the outside of the box body 2 after it has been attached. In addition, a corner recess 26 is formed on the outer side of the lower corner of the box body 2, being one step lower than the lower end surface of the side wall (see Figures 1(a) and 1(b)). This is because, as described above, when stacking multiple box bodies 2 in the stacked position, the corner protrusion 7 fits into and locks into the corner recess 26 formed on the outer side of the lower corner. This makes it easy to stack multiple box bodies 2 in the height direction without them shifting.

[0018] Furthermore, a recessed punched portion 8 is formed on the outer surface of the side wall 5 of the box body 2, inward from the box body 2. As shown in Figures 1(a) and 1(b), recessed lines 25 are provided in the punched portion 8 at predetermined intervals vertically. These recessed lines 25 serve as guidelines for cutting, which are used to adjust the size of the hole in the punched portion 8 to match the width of a side ditch or the like connected to the box body 2. Note that the punched portion 8 may not have the recessed lines 25, as shown in Figure 4.

[0019] Furthermore, a pair of handles 9 are provided on the upper outer surface of the opposing side wall 5, recessed into the inside of the box body 2 (see Figure 1). These handles 9 allow the box body 2 to be transported and moved manually, making it possible to carry it even at work sites where large heavy machinery cannot be used.

[0020] As can be seen from Figures 1 and 4, a pair of guide recesses 10 are provided on both sides of the upper end surface of the side wall 5, recessed slightly below the upper end surface. Furthermore, a guide recess 10 is also provided on the lower end surface of the side wall 5, in a position opposite to the pair of guide recesses 10 provided on both sides of the upper end surface (see Figures 1(a) and 1(b)).

[0021] The guide recess 10 is the location where the lid mounting member 3, described later, is attached and fixed, and serves as a guide when attaching the lid mounting member 3. Furthermore, because the guide recess 10 is slightly recessed downwards, when the lid mounting member 3 is attached to the guide recess 10, it becomes flush with the upper end surface of the side wall 5. This reduces rattling when the lid 4 is placed on top, allowing for stable installation.

[0022] Next, the lid mounting member 3 will be described with reference to the figures. Figure 2(a) is a front view of the lid mounting member 3 from the front, Figure 2(b) is a left side view of the lid mounting member 3 from the left side, and Figure 2(c) is a top view of the lid mounting member 3 from above. Figure 3 is a schematic diagram showing the configuration when the lid mounting member 3 is attached to the box body 2. Figure 3(a) is a front view, and Figure 3(b) is a top view.

[0023] As can be seen from Figure 3, the lid mounting member 3 is attached to the side wall of the box body 2, extending from the upper end surface to the lower end surface. The lid mounting member 3 is configured to have an upper locking portion 11 that locks onto the upper outside of the side wall 5 of the box body 2, a lower locking portion 12 that locks onto the lower outside of the side wall 5, and a connecting plate portion 13 that connects the upper locking portion 11 and the lower locking portion 12. A first connecting cylinder 14 extending horizontally is provided at the tip of the upper locking portion 11.

[0024] The upper locking portion 11 is mounted across the upper end surface of the side wall of the box body 2, extending from the inner side to the outer side of the side wall 5, with its tip locking onto the outer surface of the side wall. The lower locking portion 12 is mounted across the lower end surface of the side wall of the box body 2, extending from the inner side to the outer side of the side wall 5, with its tip locking onto the outer surface of the side wall (see Figures 3(a) and 4).

[0025] Incidentally, as can be seen from Figures 2(b) and 3(a), a resilient hook portion 15 is formed at the tip of the lower locking portion 12. The resilient hook portion 15 has a folded portion 24 that is folded back toward the lower locking portion 12. That is, a folded portion 24 is formed that is folded back toward the lower locking portion 12 at a predetermined angle. The angle of the folded portion 24 is preferably acute, for example, about 30 degrees.

[0026] Because the folded portion 24 of the resilient hook portion 15 has a predetermined angle, a snap-fit ​​structure is possible, that is, it can be fitted using elasticity. Therefore, when attaching the lid mounting member 3 to the box body 2, the resilient hook portion 15 with the folded portion 24 plays a role in securely fixing the lid mounting member 3 and the box body 2.

[0027] Here, we will briefly explain how to attach the lid mounting member 3 to the box body 2. First, the upper locking portion 11 of the lid mounting member 3 is fitted onto the upper end surface of the side wall of the box body 2, and the connecting plate portion 13 is brought into contact with the inner surface of the side wall 5. At this time, as already explained, the lid mounting member 3 is attached to the guide recess portion 10 of the box body 2. Then, the elastic hook portion 15 provided at the tip of the lower locking portion 12 of the lid mounting member 3 is pressed to move the lower locking portion 12 along the lower end surface of the side wall toward the outer surface of the side wall. Since the elastic hook portion 15 is formed at an angle, it can be moved along the lower end surface of the side wall by pressing it. After moving toward the outer surface of the side wall, the pressed elastic hook portion 15 returns to its original angle elastically, and the tip of the elastic hook portion 15 locks onto the outer surface of the side wall, thereby attaching the lid mounting member 3 (see Figures 2(b) and 3(a)).

[0028] Next, we will explain lid 4 based on the diagram. The lid 4 is composed of a pair of lid sections 16. Each lid section 16 is a roughly rectangular plate and is connected to a pair of lid mounting members 3 attached to opposing side walls 5 to form the lid 4. When the pair of lid sections 16 are opened and closed, the lid 4 can be opened and closed in a double-door manner.

[0029] Here, Figure 5(a) is a front view of the lid section 16 as seen from the front, Figure 5(b) is a left side view of the lid section 16 as seen from the left, and Figure 5(c) is a top view of the lid section 16 as seen from above.

[0030] A second connecting cylinder 17 is provided on the tip surface opposite to the contact surface between the pair of lid divisions 16 (see Figures 5(a) and 5(c)). As can be seen from Figure 6, the second connecting cylinder 17 is positioned between the first connecting cylinders 14 of the pair of lid mounting members 3 and has a through hole that connects to the insertion hole provided in the first connecting cylinder 14.

[0031] As a result, the connecting rod 23 is inserted through the holes in the first connecting cylinder 14 and the second connecting cylinder 17, allowing the lid section 16 to be attached to the pair of lid mounting members 3 (see Figure 6).

[0032] Furthermore, as shown in Figures 5(c) and 6, the upper and lower corners on the side where the second connecting cylinder 17 is provided are beveled by cutting the corners at an angle. By aligning these beveled portions with the corner protrusions 7 of the box body 2 and placing the lid section 16 on the box body 2, the lid section 16 can be easily attached to the lid mounting member 3.

[0033] By the way, as previously explained, conventional inspection boxes 1, such as handholes, have security issues because anyone can easily open and close the lid 4 using tools such as hooks.

[0034] The lid section 16 constituting the lid 4 of the present invention is provided with a locking section 18 for the purpose of enhancing security (see Figure 5). The locking section 18 is formed in a recess 19 provided on the tip contact surface of the lid section 16. The recess 19 is approximately rectangular in shape and located approximately in the center of the tip contact surface of the lid section 16, and is recessed inward toward the box body 2. Two drainage holes 20 are provided in the corners of the recess 19 to drain water such as rainwater (see Figure 5). Furthermore, in situations where enhanced security is not necessary, such as in a location where security is not required, a lid section 16 without the locking mechanism 18 may be used, as shown in Figure 6.

[0035] As can be seen from Figure 5(b), the locking portion 18 has an engaging projection 21 formed near the tip contact surface, extending substantially vertically upward from the bottom surface of the recess 19, and the engaging projection 21 is provided with a locking hole 22 for passing a key through.

[0036] In other words, when the pair of lid sections 16 are placed in contact with each other, the recesses 19 formed approximately in the center of the tip contact surfaces connect, resulting in a flat surface without any steps. Then, the locking holes 22 of the locking part 18 provided within the recesses 19 align, and by passing a key through the aligned locking holes 22 and locking them, the opening and closing of the lid sections 16 is restricted, thereby making it impossible to open or close the lid 4. The key may be, for example, a padlock.

[0037] Next, an embodiment of the assembly method for the inspection box 1 of the present invention will be described. A pair of lid mounting members 3 are attached to guide recesses 10 formed on the upper and lower end surfaces of the side wall 5 of the box body 2. To attach the lid mounting members 3, the upper locking portion 11 of the lid mounting member 3 is fitted onto the upper end surface of the side wall of the box body 2, and the connecting plate portion 13 is brought into contact with the inner surface of the side wall 5. Then, the resilient hook portion 15 provided at the tip of the lower locking portion 12 of the lid mounting member 3 is pressed to move the lower locking portion 12 along the lower end surface of the side wall toward the outer surface of the side wall. After moving toward the outer surface of the side wall, the tip of the resilient hook portion 15 locks onto the outer surface of the side wall, and the lid is attached to the box body 2.

[0038] Then, a pair of lid mounting members 3 are attached to the side wall 5 opposite to the side wall 5 to which the pair of lid mounting members 3 are attached. By providing a guide recess 10 on the upper end surface of the side wall 5, it becomes unnecessary to adjust the mounting position of the lid mounting members 3 each time, making installation easy. It also serves to prevent the lid mounting members 3 from shifting left or right.

[0039] Next, the lid sections 16 that make up the lid 4 are attached to the pair of lid mounting members 3 that are attached to the box body 2. To install the lid section 16, place it on the top opening of the box body 2. Since the lid section 16 is chamfered to match the corner protrusions 7 provided at the corners of the box body 2, it can be smoothly placed without the need to adjust its position by aligning it with the corner protrusions 7.

[0040] The second connecting cylinder 17 of the lid section 16 is provided between the first connecting cylinders 14 of the pair of lid mounting members 3. As a result, the lid section 16 is attached to the pair of lid mounting members 3 by inserting the connecting rod 23 through the holes of the first connecting cylinder 14 and the second connecting cylinder 17.

[0041] Next, by attaching the lid section 16 to the pair of lid mounting members 3 attached to the opposing side walls 5 in the same manner, the lid 4 can be opened and closed like double doors.

[0042] Furthermore, if security is to be enhanced, a lid 4 can be used in which a recess 19 is formed approximately in the center of the tip contact surface of the lid segment 16, recessing inward toward the box body 2. Since a locking portion 18 is formed within the recess 19, when the pair of lid divisions 16 are brought into contact, the locking holes 22 of the locking portion 18 align. By passing a key through the aligned locking holes 22 and locking them, the opening and closing of the lid divisions 16 is restricted, and thus the lid 4 cannot be opened or closed.

[0043] In this way, the lid 4 can be easily attached and secured to the existing block body 2 regardless of location, eliminating the need to separately manufacture a block for installing the lid 4. Furthermore, for example, in the case of an inspection box 1 that requires depth, the block body 2 can be stacked in several layers to achieve the required height, and the lid 4 can then be attached to the topmost block body 2 using the method described above.

[0044] As a result, manufacturing costs can be reduced, and since multiple blocks are not used, assembly itself is simple and easy. Furthermore, it offers the excellent benefit of enhancing security depending on the installation location and the items to be stored. [Explanation of Symbols]

[0045] 1 Inspection box 2 Boxes 3. Lid mounting member 4. Lid 5 side wall 6 Vertical planar surface forming part 7 Corner protrusion 8 Punching section 9. Handle 10 Guide recess 11 Upper locking part 12 Lower locking part 13 Connecting plate part 14 1st connecting tube 15. Projectile hook section 16 Lid fragments 17 2nd connecting tube 18 Locking mechanism 19 Recess 20 drainage holes 21 Engagement protrusion 22 locking holes 23 Connecting rod 24 Folded section 25 indented lines 26 Corner concave section

Claims

1. It comprises a box body having multiple side walls and forming a rectangular tube shape with an open top surface, a lid mounting member provided in at least one pair in the width direction of the side walls, attached to the box body from the upper end surface to the lower end surface of the side walls, and a lid placed on the top surface of the box body and attached to the lid mounting member so as to be openable and closable, The lid mounting member has an upper locking portion that straddles the upper end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; a lower locking portion that straddles the lower end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; and a connecting plate portion that connects the upper locking portion and the lower locking portion. A first connecting cylinder extending horizontally is provided on the tip side of the upper locking portion. The lid is attached between the first connecting cylinders of the pair of lid mounting members and has a second connecting cylinder having a through hole that connects to an insertion hole provided in the first connecting cylinder. A connecting rod is inserted through the holes of the first connecting cylinder and the second connecting cylinder, and the box body is attached in a way that allows it to be opened and closed. An inspection box characterized by the following features.

2. It comprises a box body having multiple side walls and forming a rectangular tube shape with an open top surface, a lid mounting member provided in at least one pair in the width direction of the side walls, attached to the box body from the upper end surface to the lower end surface of the side walls, and a lid placed on the top surface of the box body and attached to the lid mounting member so as to be openable and closable, The lid mounting member has an upper locking portion that straddles the upper end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; a lower locking portion that straddles the lower end surface of the side wall of the box body and is mounted from the inner side to the outer side of the side wall, with its tip engaging with the outer surface of the side wall; and a connecting plate portion that connects the upper locking portion and the lower locking portion. A first connecting cylinder extending horizontally is provided on the tip side of the upper locking portion. The upper locking portion of the lid mounting member is fitted into the upper end surface of the side wall of the box body, and the connecting plate portion is brought into contact with the inner surface of the side wall. The elastic hook portion provided at the tip of the lower locking portion is pressed, allowing the lower locking portion to move along the lower end surface of the side wall toward the outer surface of the side wall. After movement, the tip of the elastic hook portion locks into the outer surface of the side wall, thereby attaching the lid mounting member. The lid is attached between the first connecting cylinders of the pair of lid mounting members and has a second connecting cylinder having a through hole that connects to an insertion hole provided in the first connecting cylinder. A connecting rod is inserted through the holes of the first connecting cylinder and the second connecting cylinder, and the box body is attached in a way that allows it to be opened and closed. An inspection box characterized by the following features.

3. The pair of lid mounting members are attached to opposing side walls, and the attached lid mounting members are connected to the lid segments that constitute the lid, so that the lid formed by the lid segments can be opened and closed like double doors. An inspection box according to claim 1 or 2, characterized by the features described above.

4. A locking mechanism is provided in a recess that is recessed inward towards the box body at approximately the center of the contact surface of the tip of the lid section, and the lid can be locked with a key at this locking mechanism, thus preventing it from being opened or closed. The inspection box according to claim 3, characterized by the features described above.

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