Laminated shell structure

Abstract

Provided is a laminated housing structure capable of limiting positional displacement between vertically laminated housings and capable of preventing reduction of effective space in each of the housings as much as possible. A laminated case structure (10) is provided with: a box-shaped lower case; a box-shaped upper case that can be stacked on the lower case; a movement restricting body that restricts the horizontal movement of the upper case with respect to the lower case; and a locking body provided in the lower case, the locking body having: a fixed part fixed to the upper part of the side surface (16) of the lower case; and a locking portion extending outward from the fixing portion so as to be separated from the side surface (16), the movement restricting body being fixed to the lower portion of the side surface (26) of the upper case, the movement restricting body having a recess recessed from the lower portion toward the upper portion of the side surface (26), and the locking portion being inserted into the recess.

Description

Technical Field

[0001] The present invention relates to a laminated housing structure. Background Art

[0002] As a prior art related to stacked shells, for example, the endoscope device disclosed in Patent Document 1 is known. The endoscope device of Patent Document 1 is an endoscope device equipped with a storage shell that houses an endoscope having a flexible and slender insertion portion and a device body that controls the operation of the endoscope. The outer packaging of the storage shell is equipped with a position limiting mechanism that limits the position of the storage shells when the storage shells are brought into contact with each other. In addition, the position limiting mechanism of the endoscope device of Patent Document 1 is a convex portion provided on one of the outer packagings of a pair of opposing storage shells, or a concave portion provided on the outer packaging opposite to the outer packaging equipped with the convex portion. The convex portion is a reversible member that is rotatably fixed to the outer packaging at one end and can stand upright relative to the outer packaging or be stored freely in the outer packaging.

[0003] According to the endoscope apparatus of Patent Document 1, when the endoscope apparatus is stored in a horizontal position, the positions of the storage cases can be restricted when the storage cases are brought into contact with each other.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2006-30902 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] However, in the endoscope device of Patent Document 1, since the recessed portion of the outer packaging of the storage case is recessed toward the storage space, there is a problem of generating a dead space in the storage space of the storage case. In other words, the recessed portion recessed toward the storage space reduces the effective space available for storage in the storage space of the storage case.

[0009] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a stacked housing structure that can limit positional deviation between vertically stacked housings and prevent a reduction in effective space in each housing as much as possible.

[0010] Solutions for solving problems

[0011] In order to solve the above-mentioned problems, the present invention is a stacked shell structure, comprising: a box-shaped lower shell; a box-shaped upper shell, which can be stacked on the lower shell; a movement limiting body, which limits the horizontal movement of the upper shell relative to the lower shell; and a locking body, which is arranged on the lower shell. The stacked shell structure is characterized in that the locking body has: a fixing portion, which is fixed to the upper part of the side surface of the lower shell; and a locking portion, which extends outward from the fixing portion in a manner separated from the side surface of the lower shell. The movement limiting body is fixed to the lower part of the side surface of the upper shell, and has a recessed portion that is recessed from the lower part of the side surface of the upper shell toward the upper part, and the locking portion can be inserted into the recess.

[0012] In the present invention, the locking body includes a fixing portion fixed to the upper portion of the side surface of the lower housing, and a locking portion extending outward from the fixing portion, spaced apart from the side surface. Furthermore, a movement-limiting body is fixed to the lower portion of the side surface of the upper housing and includes a recessed portion extending from the lower portion of the side surface toward the upper portion. When the upper housing is stacked on the lower housing, the locking portion of the locking body inserts into the recessed portion of the movement-limiting body. Therefore, even if the upper housing attempts to move horizontally relative to the lower housing, the locking portion abuts against the movement-limiting body, hindering such horizontal movement. Furthermore, because the locking body is fixed to the side surface of the lower housing and the movement-limiting body is fixed to the side surface of the upper housing, the effective space for accommodating the lower and upper housings is not reduced. Consequently, horizontal positional offset between the stacked housings can be limited, and a reduction in the effective space within each housing can be minimized.

[0013] Furthermore, in the above-described stacked case structure, the locking body may be a plate member in which the fixing portion and the locking portion are integrally formed.

[0014] In this case, since the locking body is a plate member in which the fixing portion and the locking portion are integrally formed, an increase in the number of components can be suppressed and the locking body can be easily manufactured.

[0015] In the above-described stacked case structure, the locking portion may include a through hole capable of locking a wire or a hook for suspending the lower case to the locking portion.

[0016] In this case, simply by forming a through hole in the locking portion, a locking body capable of locking the wire or hook for suspending the lower shell to the locking portion can be realized, eliminating the need for a member for locking the wire or hook, thereby reducing manufacturing costs.

[0017] In addition, in the above-mentioned stacked shell structure, it can also be configured as follows: the locking portion has a pair of locking portion side surfaces inclined in such a manner that the width of the locking portion decreases as it goes from the fixed portion to the top end, and the movement limiting body has a pair of recess side surfaces inclined in such a manner that the width of the recess decreases as it goes to the upper part of the side surface of the upper shell.

[0018] In this case, the locking portion has a pair of locking portion side surfaces that are inclined so that the width of the locking portion decreases as it moves from the fixing portion toward the top end, and the position limiting body has a pair of recessed side surfaces that are inclined so that the width of the recessed portion decreases as it moves toward the upper portion of the side surface of the upper shell. Therefore, when the upper shell is stacked on the lower shell, the locking portion side surfaces of the locking portion can serve as a guide for guiding the position limiting body.

[0019] In the above-described stacked casing structure, the lower casing and the upper casing may be battery casings mounted on a battery-type industrial vehicle.

[0020] In this case, since the lower housing and the upper housing are battery housings mounted on the battery-type industrial vehicle, the upper battery housing does not move relative to the lower battery housing while the battery-type industrial vehicle is traveling.

[0021] Effects of the Invention

[0022] According to the present invention, it is possible to provide a stacked housing structure capable of limiting positional deviation between vertically stacked housings and preventing a reduction in effective space in each housing as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a perspective view showing the laminated battery case structure according to the first embodiment.

[0024] Figure 2 (a) is a top view showing the stacked battery case structure, and (b) is a rear view showing the stacked battery case structure.

[0025] Figure 3 This is an enlarged side view showing an enlarged view of a main part of the laminated battery case structure.

[0026] Figure 4 (a) is an enlarged rear view showing the main part of the stacked battery housing structure, and (b) is Figure 3 4B-4B line view in.

[0027] Figure 5(a) is an enlarged perspective view showing the main part of the battery case before stacking, and (b) is an enlarged perspective view showing the main part of the battery case after stacking.

[0028] Figure 6 (a) is a perspective view of the main part of Modification 1, (b) is a perspective view of the main part of Modification 2, and (c) is a perspective view of the main part of Modification 3.

[0029] Description of Reference Numerals

[0030] 10-layer battery casing structure

[0031] 11 Battery housing (lower housing)

[0032] 12 battery housing (upper housing)

[0033] 18 incisions

[0034] 19 lead wire

[0035] 20 Guide stop

[0036] 21 recess

[0037] 28 incisions

[0038] 29 lead wire

[0039] 31, 61, 81, 91 plate components (locking bodies)

[0040] 32 fixed part

[0041] 33, 63, 83, 93 stop parts

[0042] Side of the stopper of 43, 66, 86, 96

[0043] 45 through holes

[0044] 51, 71 plate member (movement restriction body)

[0045] 57 Inner side of plate member

[0046] 59, 72 concave part

[0047] 63 stopper

[0048] 88 incision

[0049] 98 extension. DETAILED DESCRIPTION

[0050] (First embodiment)

[0051] The following describes a laminated battery case structure according to a first embodiment with reference to the accompanying drawings. The laminated battery case structure of this embodiment comprises two upper and lower battery cases. The upper and lower battery cases are mounted on a battery-powered forklift, an industrial vehicle.

[0052] like Figure 1 As shown, the stacked battery case structure 10 includes a battery case 11 and a battery case 12 that can be stacked on battery case 11. Battery case 11 corresponds to the lower case, and battery case 12 corresponds to the upper case. Battery cases 11 and 12 are box-shaped iron cases that house batteries (not shown). The battery cells are, for example, lithium-ion secondary batteries.

[0053] The battery case 11 has a rectangular bottom plate 14, a pair of side plates 15 rising from the bottom plate 14, a pair of side plates 16 having surfaces substantially perpendicular to the side plates 15, and a top plate 17 opposite the bottom plate 14. The bottom plate 14, the pair of side plates 15, the pair of side plates 16, and the top plate 17 form a rectangular storage space inside the battery case 11. When the battery case 11 is mounted on the body of a forklift (not shown), one of the pair of side plates 15 faces forward and the other side plate 15 faces rearward. Furthermore, when the battery case 11 is mounted on the body of the forklift, one of the pair of side plates 16 faces right and the other side plate 16 faces left.

[0054] The bottom plate 14 forms the bottom surface of the battery housing 11, and the pair of side plates 15 form the side surfaces of the battery housing 11 in the front and rear directions. Figure 2 As shown, a pair of side plates 16 form left and right side surfaces of the battery case 11 , and a top plate 17 forms an upper surface of the battery case 11 .

[0055] A cutout 18 is provided near the upper end of the other side plate 15. Cutout 18 is for passing lead wires 19 extending from the battery cells to the battery case 11. A guide stopper 20 is provided on the other side plate 16. The guide stopper 20 facilitates positioning of the battery case 11 relative to the vehicle body. A recess 21 is formed in the guide stopper 20, extending upward in a mountainous shape from the bottom surface. A protrusion (not shown) provided on the vehicle body is inserted into and engaged with the recess 21.

[0056] The top plate 17 is attached to the upper ends of the pair of side plates 15 and the upper ends of the pair of side plates 16 via bolts (not shown). Therefore, the top plate 17 can be removed from the side plates 15 and 16 by removing the bolts.

[0057] Next, the battery case 12 is described. The battery case 12 is substantially the same as the battery case 11. The battery case 12 has a rectangular bottom plate 24, a pair of side plates 25 rising from the bottom plate 24, a pair of side plates 26 having surfaces substantially orthogonal to the side plates 25, and a top plate 27 opposite to the bottom plate 24. The bottom plate 24, the pair of side plates 25, the pair of side plates 26, and the top plate 27 form a rectangular shaped accommodation space inside the battery case 12. When the battery case 12 is mounted on the body of a forklift (not shown), one of the pair of side plates 25 faces forward, and the other side plate 25 faces backward. Furthermore, when the battery case 12 is mounted on the body of the forklift, one of the pair of side plates 26 faces right, and the other side plate 26 faces left.

[0058] like Figure 2 As shown, the bottom plate 24 forms the bottom surface of the battery case 12, the pair of side plates 25 form the side surfaces of the battery case 12 in the front-back direction, the pair of side plates 26 form the side surfaces of the battery case 12 in the left-right direction, and the top plate 27 forms the upper surface of the battery case 12.

[0059] A notch 28 is provided near the upper end of the other side plate 25. The notch 28 is for passing lead wires 29 extending from the battery cells to the battery case 12. When the battery case 12 is stacked on the battery case 11, the bottom plate 24 of the battery case 12 abuts against the top plate 17 of the battery case 11.

[0060] The laminated battery case structure 10 also includes a locking body disposed on the lower battery case 11 and capable of locking a wire or hook that suspends the lower battery case 11. Furthermore, the laminated battery case structure 10 includes a movement restricting body that restricts movement of the upper battery case 12 relative to the lower battery case 11.

[0061] First, the locking body will be described. Figure 3 As shown, iron plate members 31 serving as latches are welded to the pair of side plates 16 of the battery case 11. Plate members 31 are attached to each of the pair of side plates 16, but for ease of explanation, the plate member 31 attached to the other side plate 16 will be described below. Plate member 31 includes a fixing portion 32 and a latching portion 33. The fixing portion 32 is a generally rectangular portion fixed to the upper portion of the side plate 16 of the battery case 11. The fixing portion 32 includes a fixing portion front surface 34, a fixing portion rear surface 35, a fixing portion bottom surface 36, and a pair of fixing portion side surfaces 37. The fixing portion front surface 34 faces leftward. The fixing portion rear surface 35 is generally parallel to the fixing portion front surface 34 and serves as the joining surface with the side plate 16. The fixing portion bottom surface 36 is generally parallel to the plate surface of the top plate 17, and the pair of fixing portion side surfaces 37 are generally perpendicular to the fixing portion bottom surface 36 and extend in the vertical direction.

[0062] The locking portion 33 is a substantially trapezoidal portion extending outward from the fixing portion 32 in a manner separate from the side plate 16. The fixing portion 32 and the locking portion 33 are formed integrally. Figure 4 As shown, the majority of the locking portion 33 is located above the top plate 17, and the locking portion 33 extends in a direction inclined relative to the side plate 16. The locking portion 33 has an inclination angle of about 20 degrees relative to the side plate 16.

[0063] The locking portion 33 has a locking portion front face 41, a locking portion back face 42, a pair of locking portion side faces 43, and a locking portion upper surface 44. The locking portion front face 41 is a surface continuous with the fixing portion front face 34. The locking portion back face 42 is a surface continuous with the fixing portion back face 35 and is a surface roughly parallel to the locking portion front face 41. The locking portion front face 41 and the locking portion back face 42 are inclined at approximately 20 degrees relative to the side plate 16. The pair of locking portion side faces 43 are formed in such a manner that the width of the locking portion 33 decreases as it moves from the fixing portion 32 toward the top. One locking portion side face 43 is a side face extending from one fixing portion side face 37 and is inclined relative to the fixing portion side face 37. The other locking portion side face 43 is a side face extending from the other fixing portion side face 37 and is inclined relative to the fixing portion side face 37.

[0064] The locking portion upper surface 44 connects the upper ends of the locking portion side surfaces 43 and forms the top end of the locking portion 33. Because the pair of locking portion side surfaces 43 are formed so that the width of the locking portion 33 decreases as it moves from the fixing portion 32 toward the top end, the length of the locking portion upper surface 44 is smaller than the fixing portion bottom surface 36. A through hole 45 is formed in the center of the locking portion 33, extending from the locking portion front surface 41 to the locking portion back surface 42. Through hole 45 is a hole for passing a wire or hook used to suspend the battery case 11 through the through hole so that it can be locked to the locking portion 33.

[0065] Next, the movement restriction body will be described. Figure 4 As shown, a plate member 51 is welded to the side plate 26 of the battery case 12. The plate member 51 constitutes a movement restrictor that restricts the movement of the battery case 12 relative to the battery case 11. The plate member 51 is positioned below the side plate 26 and close to the bottom plate 24. The plate member 51 has a plate member front surface 52, a plate member back surface 53, a plate member top surface 54, and a pair of plate member side surfaces 55. Furthermore, the plate member 51 has a pair of plate member bottom surfaces 56, a plate member inner side surface 57, and a plate member top surface 58.

[0066] The front face 52 of the plate member is the surface facing the left. The back face 53 of the plate member is the surface roughly parallel to the side plate 26 and is the bonding surface with the side plate 26. The upper surface 54 of the plate member is the upper surface of the plate member 51 and is roughly parallel to the plate surface of the bottom plate 24. A pair of side faces 55 of the plate member are surfaces roughly perpendicular to the upper surface 54 of the plate member and extend in the upward and downward directions. Figure 3 As shown, the pair of plate member lower bottom surfaces 56 are surfaces extending from the lower ends of the plate member side surfaces 55 in a substantially perpendicular direction and are surfaces close to the top plate 17 at the lower portion of the side plate 26 .

[0067] like Figure 3 、 Figure 5 As shown, a pair of plate member inner side surfaces 57 and a plate member upper bottom surface 58 are surfaces of the plate member 51 that form the recess 59. The pair of plate member inner side surfaces 57 are formed so that the width of the recess 59 decreases as one moves upward from the plate member lower bottom surface 56. The plate member inner side surfaces 57 are inclined relative to the vertical direction. The plate member upper bottom surface 58 is a surface connecting the upper ends of the plate member inner side surfaces 57 and is approximately parallel to the plate member lower bottom surface 56. The length of the plate member upper bottom surface 58 is greater than the upper surface 44 of the retaining portion.

[0068] The recess 59 allows a portion of the latching portion 33 to be inserted when the battery case 12 is stacked on the battery case 11. The latching portion side surface 43 and the plate member inner surface 57 have the same or substantially the same inclination angle relative to the vertical direction. Therefore, when the battery case 12 is stacked on the battery case 11, the latching portion side surface 43 of the latching portion 33 abuts against the plate member inner surface 57 of the plate member 51, functioning as a guide for determining the front-to-back position. The latching portion back surface 42 abuts against the corners of the battery case 12 relative to the side and bottom surfaces of the battery case 11, functioning as a guide for determining the left-to-right position.

[0069] Furthermore, while the inclination angle of the locking portion 33 is set to 20 degrees, it can be adjusted based on conditions such as the space within the vehicle body where the battery cases 11 and 12 are mounted. As the inclination angle of the locking portion 33 increases, the distance between the side plate 16 and the tip of the locking portion 33 increases. Because the battery cases 11 and 12 are suspended as heavy objects, the inclination angle is preferably within the range of 15 to 30 degrees, taking into account the strength of the locking member.

[0070] Next, the function of the stacked battery casing structure 10 of this embodiment will be described. When stacking the battery casing 12 on the pre-placed battery casing 11, the operator moves the suspended battery casing 12 above the battery casing 11, aligns the orientation of the battery casing 12 with the orientation of the battery casing 11, and then lowers the battery casing 12. When the battery casing 12 is lowered, the left-right position of the battery casing 12 may be slightly deviated from the battery casing 11. In this case, if the corners of the bottom plate 24 and the side plate 26 of the battery casing 12 abut against the back surface of the locking portion 33 of the plate member 31, they will be guided by the back surface 42 of the locking portion. As a result, the left-right positioning of the battery casing 12 is performed while the battery casing 12 is lowered.

[0071] Furthermore, when the battery case 12 is lowered, its front-to-back position may shift slightly relative to the battery case 11. In this case, when the locking portion 33 of the plate member 31 is inserted into the recess 59 of the plate member 51 of the battery case 12, the plate member 51 is guided by the locking portion 33. Specifically, when the plate member inner side surface 57 abuts the locking portion side surface 43 due to the lowering of the battery case 12, the plate member inner side surface 57 is guided by the locking portion side surface 43. As a result, the battery case 12 is positioned in the front-to-back direction as it is lowered.

[0072] When the battery case 12 is stacked on the battery case 11, even if the battery case 12 attempts to shift in the front-to-back direction, the inner side surface 57 of the plate member 51 abuts the side surface 43 of the retaining portion of the plate member 31. Therefore, the battery case 12 is prevented from shifting in the front-to-back direction relative to the battery case 11. Even if the battery case 12 attempts to shift in the left-to-right direction, the plate member 51 abuts the retaining portion 33 of the plate member 31, thereby preventing the battery case 12 from shifting in the left-to-right direction relative to the battery case 11. Thus, in this embodiment, the retaining portion 33 of the plate member 31 and the plate member 51 restrict horizontal movement of the battery case 12 relative to the battery case 11.

[0073] When suspending the stacked battery cases 11 and 12, a wire (not shown) is passed through the through-holes 45, latched to the latching portions 33, and then pulled up to hold the stacked battery cases 11 and 12. Alternatively, a hook (not shown) can be passed through the through-holes 45 and latched to the latching portions 33 instead of the wire to hold the stacked battery cases 11 and 12.

[0074] Plate member 31 is provided on side plate 16 of battery case 11, and plate member 51 is provided on side plate 26 of battery case 12. Therefore, a rectangular parallelepiped accommodation space without unevenness is formed inside battery cases 11 and 12, and dead space is less likely to be generated in the accommodation space.

[0075] The laminated battery case structure 10 according to this embodiment has the following effects.

[0076] (1) The plate member 31, serving as a locking member, includes a fixing portion 32 fixed to the upper portion of the side plate 16 of the battery case 11, and a locking portion 33 extending outward from the fixing portion 32, spaced apart from the side plate 16. Furthermore, the plate member 51, serving as a movement restrictor, is fixed to the lower portion of the side plate 26 of the battery case 12 and includes a recess 59 extending upward from the lower portion of the side plate 26. When the battery case 12 is stacked on the battery case 11, the locking portion 33 of the plate member 31 is inserted into the recess 59 of the plate member 51. Therefore, even if the battery case 12 attempts to move horizontally relative to the battery case 11, the plate member 51 abuts against the locking portion 33, thereby preventing such horizontal movement. Furthermore, since the plate member 31 is fixed to the side plate 16 of the battery case 11 and the plate member 51 is fixed to the side plate 26 of the battery case 12, the effective space for accommodating the battery cases 11 and 12 is not reduced. Therefore, positional deviation between the battery cases 11 and 12 stacked one above the other can be restricted, and reduction in the effective space in the battery cases 11 and 12 can be prevented as much as possible.

[0077] (2) The plate member 31 as the locking body is a plate member in which the fixing portion 32 and the locking portion 33 are integrally formed. Therefore, an increase in the number of components can be suppressed and the locking body can be easily manufactured.

[0078] (3) The plate member 31 includes the through hole 45. Therefore, simply by forming the through hole 45 in the locking portion 33, a locking body capable of locking the wire or hook that suspends the battery case 11 to the locking portion 33 can be realized. This eliminates the need for a separate member for locking the wire or hook, thereby reducing manufacturing costs.

[0079] (4) The locking portion 33 has a pair of locking portion side surfaces 43 that are inclined so that the width of the locking portion 33 decreases as it moves from the fixing portion 32 toward the top. The plate member 51 has a pair of plate member inner side surfaces 57 that are recessed side surfaces that are inclined so that the width of the recessed portion 59 decreases as it moves toward the upper portion of the side plate 26 of the battery case 12. Therefore, when the battery case 12 is stacked on the battery case 11, the locking portion side surfaces 43 of the locking portion 33 can serve as a guide for guiding the plate member 51.

[0080] (5) The lower and upper housings are the battery housings 11 and 12 mounted on the battery-type industrial vehicle. Therefore, the upper battery housing 12 does not move relative to the lower battery housing 11 while the battery-type industrial vehicle is traveling.

[0081] (Variation)

[0082] Next, Modification 1 will be described. Figure 6 The plate member 61 shown in (a) as a locking body has a fixing portion 32 and a locking portion 63. The locking portion 63 has a pair of locking portion side surfaces 66 and a locking portion upper surface 67. The pair of locking portion side surfaces 66 are parallel. The plate member 71 as a movement limiting body has a recess 72. The pair of plate member inner side surfaces 73 forming the recess 72 are approximately parallel to each other, and the length between the pair of plate member inner side surfaces 73 at the recess 72 is slightly larger than the length between the pair of locking portion side surfaces 66 of the locking portion 63. If the position of the battery case 12 relative to the front-to-back direction of the battery case 11 is accurately aligned and the battery case 12 is lowered and stacked, the battery case 12 can be stacked on the battery case 11.

[0083] Next, Modification 2 will be described. Figure 6 The locking portion 83 of the plate member 81 shown in FIG. (b) has a pair of locking side surfaces 86 for locking, and a locking upper surface 87. The locking portion 83 does not have a through-hole 45, but has a cutout 88 formed so as to allow access from one of the locking side surfaces 86. The cutout 88 is for passing a wire or hook used to suspend the battery cases 11 and 12.

[0084] Next, Modification 3 will be described. Figure 6 The locking portion 93 of the plate member 91 shown in (c) has a pair of extensions 98 formed to expand the plate width near the locking portion upper surface 97. These extensions 98 are portions of the locking portion 93 that have been expanded in width. They extend from the upper ends of the pair of locking portion side surfaces 96 and allow a wire or hook to pass through from below. According to Modifications 1 to 3, positional misalignment between the stacked battery cases 11 and 12 can be limited, and the reduction in the effective space within the battery cases 11 and 12 can be minimized.

[0085] The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the invention. For example, the following modifications are also possible.

[0086] In the above embodiment, the lower and upper shells of the stacked shell structure are described as battery shells mounted on a battery-type industrial vehicle, but the present invention is not limited thereto. The lower and upper shells of the stacked shell structure may simply be shells capable of storing items.

[0087] In the above embodiment, the locking body is provided only on the lower housing, but this is not limiting. The locking body may also be provided on the upper housing. Providing the locking body on the upper housing allows other housings to be stacked on top of the upper housing. Alternatively, the locking body may be provided on the upper housing, while the movement-restricting body may be provided on the lower housing. In this case, the upper housing can be stacked with the lower housing as the upper layer.

[0088] In the above embodiment, the fixing portion and the locking portion of the locking body are integrally formed, but the present invention is not limited thereto. The fixing portion and the locking portion may be separate components connected via a connecting member.

Claims

1. A laminated shell structure comprising: a box-shaped lower shell; A box-shaped upper shell capable of being stacked on the lower shell; a movement limiting body that limits horizontal movement of the upper shell relative to the lower shell; and A locking body, which is arranged on the lower shell, The stacked shell structure is characterized in that: The locking body has: a fixing portion fixed to an upper portion of a side surface of the lower shell; and a locking portion extending outward from the fixing portion in a manner spaced apart from the side surface of the lower shell, The movement restriction body is fixed to the lower portion of the side surface of the upper shell, and has a recessed portion recessed from the lower portion toward the upper portion of the side surface of the upper shell. The locking portion is insertable into the recess.

2. The laminated shell structure according to claim 1, wherein: The locking body is a plate member in which the fixing portion and the locking portion are integrally formed.

3. The laminated shell structure according to claim 1 or 2, characterized in that: The locking portion includes a through hole capable of locking a wire or a hook for suspending the lower shell to the locking portion.

4. The laminated shell structure according to claim 1 or 2, characterized in that: The locking portion has a pair of locking portion side surfaces inclined so that the width of the locking portion decreases as it goes from the fixing portion toward the tip. The movement restricting body has a pair of recessed side surfaces inclined so that a width of the recessed portion decreases toward an upper portion of the side surface of the upper case.

5. The laminated shell structure according to claim 1 or 2, characterized in that: The lower housing and the upper housing are battery housings mounted on a battery-type industrial vehicle.

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