JP7489889B2 - Hinge structure of door body in electrical equipment storage box - Google Patents

Description

The present invention relates to a hinge structure for a door that can be opened in one direction in a box for storing electrical equipment, such as a distribution board, switchboard, or control panel.

A commonly known electrical equipment storage box for storing various electrical equipment such as distribution boards and switchboards has a box body with an opening on the front side, and a door for opening and closing the opening is hinged to the front side of the box, with the door being hinged around either the left or right side as an axis so that it can be opened in one direction.
A typical structure for hingedly attaching a door body in this manner so that it can be opened in one direction or the other is a hinge structure that uses a first receiving member that has a pin receiving portion and is fixed to the box body, a second receiving member that also has a pin receiving portion and is fixed to the door body, and a hinge pin that is inserted through both pin receiving portions, as described in Patent Document 1, for example.

JP 2002-327569 A

However, the conventional hinge structure had the problem that the work of attaching and detaching the door body to the box body (particularly the installation work) was cumbersome.

The present invention has been made in consideration of the above problems, and aims to provide a hinge structure for a door in a box for storing electrical equipment that allows the door to be attached and detached from the box body more easily than before.

In order to achieve the above object, the present invention provides a box for storing electrical equipment, the box having a box body with an opening on a front surface, and a door body for opening and closing the opening. The door body has a hinge structure interposed between the box body and the door body at an upper portion of the door body, for allowing the door body to be opened in one direction about an axis in the vertical direction relative to the box body, the hinge structure comprising a pin member fixed to the door body and a pin receiving member fixed to the box body, the pin member comprising a main body, a hinge pin having a tip protruding upward from the main body and capable of being retracted into and out of the main body, and a hinge member fixed to the main body. The present invention is characterized in that the box has a spring member which springs the pin upward, while the pin receiving member has a fixed portion for fixing the box to the box body and a pin receiving portion provided at a position a predetermined distance forward of the fixed portion, the pin receiving portion being formed in a cylindrical shape extending in the vertical direction, with a pin hole into which the butterfly pin can be inserted opening at its lower end surface, and further, a notch being provided at the rear of the opening of the pin hole, and a guide surface extending in the front-to-rear direction through the notch to extend from the inside to the outside of the pin hole for guiding the tip of the butterfly pin from outside the pin hole to inside the pin hole.
In order to achieve the above object, the present invention provides a box for storing electrical equipment, the box having a box body with an opening on a front surface and a door body for opening and closing the opening, the door body having a hinge structure interposed between the box body and the door body at a lower portion of the door body, for allowing the door body to be opened in one direction about an axis in the vertical direction relative to the box body, the door body having a pin member fixed to the door body and a pin receiving member fixed to the box body, the pin member comprising a main body, a hinge pin having a tip protruding downward from the main body and capable of being retracted into and out of the main body, and The present invention is characterized in that the box has a spring member which springs the butterfly pin downward, while the pin receiving member has a fixed portion for fixing the box to the box body and a pin receiving portion provided at a position a predetermined distance forward of the fixed portion, the pin receiving portion being formed in a cylindrical shape extending in the vertical direction, with a pin hole into which the butterfly pin can be inserted opening at the upper end surface, and further, a notch being provided at the rear of the opening of the pin hole, and a guide surface extending in the front-to-rear direction through the notch to extend from the inside to the outside of the pin hole for guiding the tip of the butterfly pin from outside the pin hole to inside the pin hole.
The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, at least one of the pin member and the pin receiving member is provided with a regulating protrusion that protrudes toward the other side and comes close to the other when the opening angle of the door body relative to the box body is set to a specific opening angle, and the regulating protrusion regulates the movement of the pin member in a direction along the guide surface when the opening angle of the door body is at the specific opening angle.
The invention described in claim 4 is characterized in that, in the invention described in any one of claims 1 to 3, the pin receiving portion of the pin receiving member comprises a first pinhole member having the pin hole, the notch, and the guide surface, and an installation portion in which the first pinhole member can be installed, and a second pinhole member is provided which has the pin hole but does not have the notch or the guide surface, and the second pinhole member can also be installed in the installation portion instead of the first pinhole member.

According to the present invention, there is provided a pin member fixed to the door body and a pin receiving member fixed to the box main body, the pin member having a main body, a butterfly pin whose tip protrudes upward (downward in claim 2) from the main body and is retractable relative to the main body, and a biasing member which biases the butterfly pin upward (downward in claim 2), while the pin receiving member has a fixing portion for fixing it to the box main body and a pin receiving portion provided at a position a predetermined distance forward of the fixing portion, the pin receiving portion being formed in a cylindrical shape extending in the vertical direction, and a pin hole into which the butterfly pin can be inserted is opened at the lower end surface (upper end surface in claim 2), and further a notch is provided at the rear of the opening of the pin hole, and a guide surface is provided extending in the front-to-rear direction through the notch from inside to outside the pin hole to guide the tip of the butterfly pin from outside the pin hole to inside the pin hole. Therefore, by placing the tip of the hinge pin against the guide surface and moving the pin member forward together with the door body in this state, the hinge pin is inserted into the pin hole, assembling the hinge and attaching the door body to the box body. Therefore, it is easier to attach the door body to the box body than before.
According to the invention described in claim 3, at least one of the pin member and the pin receiving member is provided with a restricting protrusion that protrudes toward the other and approaches the other when the opening angle of the door body relative to the box body is set to a specific opening angle, and the restricting protrusion restricts the movement of the pin member in the direction along the guide surface when the opening angle of the door body is at the specific opening angle. Therefore, it is possible to effectively prevent the pin member from moving in the direction along the guide surface due to the weight of the door body or the like, causing the pin member to inadvertently fall out of the pin receiving member, i.e., the door body from inadvertently falling off.
According to the invention described in claim 4, the pin receiving portion of the pin receiving member is composed of a first pin hole member having a pin hole, a notch, and a guide surface, and a mounting portion in which the first pin hole member can be mounted, and a second pin hole member having a pin hole but no notch or guide surface is provided, and the mounting portion can also be used to mount the second pin hole member instead of the first pin hole member. Therefore, the configuration of the pin receiving member can be easily changed according to the use form and installation mode of the electrical equipment storage box, and a hinge structure that is easy to use can be obtained. In addition, by using the first pin hole member and the second pin hole member separately, it is possible to accommodate both a case in which the door body is attached so as to be able to open to the left and a case in which the door body is attached so as to be able to open to the right, and therefore a hinge structure that is highly versatile and extremely easy to use can be obtained.

FIG. 2 is a perspective explanatory view showing the appearance of the electrical device storage box; FIG. 2 is a perspective explanatory view showing the electrical equipment storage box with the door body in an open state; FIG. 13 is a perspective explanatory view showing an upper hinge. 5A is a front view of the pin receiving member, FIG. 5B is a left side view of the pin receiving member, and FIG. 5C is a perspective view of the pin receiving member from below. 5A to 5C are explanatory diagrams showing a pin member, in which (a) is a front view, (b) is a rear view, and (c) is a perspective explanatory view showing the rear side. FIG. 13 is an explanatory diagram showing a cross section of the upper hinge in an assembled state. FIG. 13 is an explanatory diagram showing how to assemble the upper hinge. FIG. 13 is an explanatory perspective view showing the lower hinge in a locked state from the rear side. FIG. 13 is an explanatory diagram showing a cross section of the lower hinge in a locked state. FIG. 11 is an explanatory diagram showing the upper hinge of the second embodiment from the right side. FIG. 13 is an explanatory diagram showing the state of the hinge from the right side according to the opening angle of the door body, where (a) shows the case where the opening angle of the door body is 90 degrees, (b) shows the case where the opening angle of the door body is 180 degrees, and (c) shows the case where the opening angle of the door body is 270 degrees. FIG. 13 is an explanatory perspective view showing a pin receiving member of a lower hinge of the third embodiment, which is a pin receiving member that does not have a detachable function. FIG. 4 is an explanatory perspective view showing a pin receiving member in an exploded state. FIG. 13 is a perspective explanatory view showing a pin receiving member of a lower hinge of the third embodiment, which is a pin receiving member having a detachable function. FIG. 4 is an explanatory perspective view showing a pin receiving member in an exploded state. FIG. 4 is a perspective view illustrating a pin lock member. 13 is an explanatory cross-sectional view showing a state in which a hinge pin of a pin member is locked by a pin lock member. FIG.

(First embodiment)
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric device storage box (hereinafter simply referred to as a storage box) having a hinge structure according to a first embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is an explanatory perspective view showing the appearance of the storage box 1. Figure 2 is an explanatory perspective view showing the storage box 1 with the door body 3 in an open state. Figure 3 is an explanatory perspective view showing the upper hinge 10. Figure 4 is an explanatory view showing the pin receiving member 11, where (a) is a front view, (b) is a left side view, and (c) is a perspective view from below. Figure 5 is an explanatory view showing the pin member 12, where (a) is a front view, (b) is a rear view, and (c) is a perspective view showing the rear side. Figure 6 is an explanatory view showing a cross section of the upper hinge 10 in an assembled state. Figure 7 is an explanatory view showing the state of assembling the upper hinge 10. Figure 8 is an explanatory perspective view showing the lower hinge 10 in a locked state from the rear side. Figure 9 is an explanatory view showing a cross section of the lower hinge 10 in a locked state.

The storage box 1 comprises a box body 2 with an opening on the front, and a door body 3 for opening and closing the opening of the box body. The box body 2 is a box body with a top plate, left and right side plates, a back plate, and a bottom plate, and five sides except the front side (top, left and right side plates, rear, and bottom) are closed, and various electrical devices such as distribution boards can be stored in the internal space. In addition, the door body 3 for opening and closing the opening of the box body 2 is attached to the front of the box body 2. Hinges 10 are interposed between the box body 2 and the door body 3 at the upper and lower parts of their right sides, and the door body 3 can be freely opened in one direction relative to the box body 2, with the right side part as an axis.

Here, of the hinges 10, 10 which are the essential parts of the present invention, a detailed description will be given of the upper hinge 10. The lower hinge 10 has substantially the same structure as the upper hinge 10 turned upside down, with the only difference being the position of the reinforcing rib 24 which will be described later.
The hinge 10 includes a pin receiving member 11 fixed to the box body 2 and a pin member 12 fixed to the door body 3. The pin receiving member 11 has a fixed portion 21 fixed to the periphery of the opening of the box body 2, a pin receiving portion 22 provided at a position a predetermined distance forward from the fixed portion 21, a connecting portion 23 connecting the fixed portion 21 and the pin receiving portion 22, and a reinforcing rib 24 for reinforcing the pin receiving portion 22. The fixed portion 21 is plate-shaped and elongated in the vertical direction, with the front-rear direction being the thickness direction, and has screw holes 25 drilled at the upper and lower parts for screwing the fixed portion 21 to the box body 2. The connecting portion 23 is plate-shaped and the thickness direction is the vertical direction, and extends forward from the upper end of the fixed portion 21. The pin receiving portion 22 is formed in a cylindrical shape extending downward from the tip of the connecting portion 23, and a pin hole 26 into which the hinge pin 32 of the pin member 12 can be inserted is opened at the tip of the pin receiving portion 22.

In addition, a guide rib 28 is provided on the rear side of the pin receiving portion 22, extending from the connecting portion 23 along the rear surface of the pin receiving portion 22. Meanwhile, a notch 27 is provided at the rear of the pin hole 26 at the tip portion of the pin receiving portion 22 (the opening of the pin hole 26). A series of surfaces extending in the front-rear direction from the inside to the outside of the pin hole 26 through the notch 27 are formed by the lower end surface (tip surface) of the guide rib 28 and the step surface connecting the inner surface of the pin hole 26 and the notch 27 in the pin hole 26, and this surface is used as a guide surface for guiding the tip of the butterfly pin from outside the pin hole 26 to inside the pin hole 26. Of these guide surfaces, the guide surface 29A outside the pin hole 26 (the lower end surface of the guide rib 28) is inclined so as to rise as it moves rearward from the notch 27. In addition, the guide surface (step surface) 29B inside the pin hole 26 is inclined so as to rise as it moves forward from the notch 27. The reinforcing rib 24 stands forward along the right ends of the fixed portion 21 and the connecting portion 23, integrating the fixed portion 21 and the pin receiving portion 22.

The pin member 12 has a main body 31 that is long in the vertical direction, a hinge pin 32 that is held by the main body 31 and whose tip can be inserted and removed from the main body 31, and a coil spring 33 (omitted from Figures 5, 8, etc.) that urges the hinge pin 32 so that the tip of the hinge pin 32 protrudes upward from the top surface of the main body 31. The main body 31 is provided with screw holes 34, 34 for screwing the main body 31 to the front surface of the door body 3, and an opening 35 that exposes the pin head of the hinge pin 32 is provided on the surface (back surface) of the main body 31 that faces the door body 3 when fixed to the door body 3.

The upper hinge 10 is assembled and the door body 3 is attached to the box body 2 as follows, after the pin receiving member 11 is fixed to the box body 2 side and the pin member 12 is fixed to the door body 3 side.
First, the tip of the hinge pin 32 is positioned between the guide rib 28 and the fixed part 21 (FIG. 7(a)). At this time, the lower hinge 10 is preassembled by inserting the hinge pin 32 into the pin hole 26. Then, while maintaining the assembled state of the lower hinge 10, the door body 3 is moved so as to pull out the upper part of the door body 3 forward. Then, after the tip of the hinge pin 32 abuts against the guide surface 29A (FIG. 7(b)), the tip of the hinge pin 32 moves toward the notch 27 on the guide surface 29A while being pushed into the main body 31 (FIG. 7(c)). Furthermore, the tip of the hinge pin 32 moves into the pin hole 26 through the notch 27 and moves forward on the guide surface 29B (FIG. 7(d)), so that the hinge pin 32 starts to protrude upward again. Finally, the tip of the hinge pin 32 passes over the front end of the guide surface 29B, and the hinge pin 32 protrudes to its maximum extent (Figure 6), completing the assembly of the upper hinge 10 and thus the attachment of the door body 3 to the box body 2.

After the door body 3 is attached to the box body 2, the lower hinge 10 is locked as follows to prevent the door body 3 from falling off accidentally. That is, the pin lock member 41 is inserted into the body 31 through the opening 35, and the pin lock member 41 is engaged with the pin head of the hinge pin 32 (FIG. 9), thereby restricting the movement of the hinge pin 32 from the body 31. The spacer member 42 is inserted into the notch 27 of the pin receiving portion 22, and the notch 27 is filled with the spacer member 42, thereby restricting the movement of the pin member 12 backward (movement in the direction of coming off the pin receiving member 11 through the notch 27). The lower pin member 12 fixing portion of the door body 3 is provided with a window 43 (shown in FIG. 2) for exposing the opening 35.

The hinge 10 (particularly the upper hinge 10) of the door body 3 in the storage box 1 having the above-mentioned configuration includes a pin member 12 fixed to the door body 3 and a pin receiving member 11 fixed to the box body 2. The pin member 12 has a main body 31, a butterfly pin 32 whose tip protrudes upward from the main body 31 and is retractable relative to the main body 31, and a coil spring 33 that urges the butterfly pin 32 upward, while the pin receiving member 12 has a fixed portion 21 for fixing to the box body 2 and a pin receiving portion 22 provided at a position a predetermined distance forward of the fixed portion 21, and the pin receiving portion 22 is formed in a cylindrical shape extending in the vertical direction and has a pin hole 26 open at the bottom end surface into which the butterfly pin 32 can be inserted. A notch 27 is provided at the rear of the opening of the pin hole 26, and guiding surfaces 29A, 29B are provided in the front-rear direction to guide the tip of the hinge pin 32 from the outside of the pin hole 26 to the inside of the pin hole 26 through the notch 27. Therefore, by placing the tip of the hinge pin 32 against the guiding surfaces 29A, 29B and moving the pin member 12 forward together with the door body 3 in this state, the hinge pin 32 is inserted into the pin hole 26, and the hinge 10 is assembled, and the door body 3 is attached to the box body 2. Therefore, the door body 3 can be attached to the box body 2 more easily than before.

Of the guide surfaces, guide surface 29A outside pin hole 26 is inclined so that it rises as it moves rearward from notch 27, while guide surface 29B inside pin hole 26 is inclined so that it rises as it moves forward from notch 27. Therefore, inside and outside pin hole 26, the tip of hinge pin 32 can be smoothly guided onto guide surface 29A (or guide surface 29B), making it even easier to attach and detach door body 3. In particular, the inclination of guide surface 29B effectively prevents hinge pin 32 inserted in pin hole 26 from accidentally falling out of pin hole 26.

Furthermore, the hinge 10 on the lower side of the door body 3 can be fitted with a pin lock member 41 that can be engaged with the pin head of the hinge pin 32, and a spacer member 42 that fills the notch 27. This makes it possible to restrict the movement of the hinge pin 32 into and out of the main body 31 when the hinge 10 is in an assembled state, and to restrict the movement of the pin member 12 in the direction of coming off the pin receiving member 11 through the notch 27, thereby reliably preventing the door body 3 from accidentally falling off.

Second Example
Next, a hinge structure according to a second embodiment of the present invention will be described with reference to FIGS.
Fig. 10 is an explanatory diagram showing the upper hinge 50 from the right side. Fig. 11 is an explanatory diagram showing the state of the hinge 50 according to the opening angle of the door body from the right side, where (a) shows a case where the opening angle of the door body is 90 degrees, (b) shows a case where the opening angle of the door body is 180 degrees, and (c) shows a case where the opening angle of the door body is 270 degrees. Note that the door body is omitted in Fig. 10 and Fig. 11. Also, the opening angle of the door body in Fig. 10 is 0 degrees (i.e., the door body closes the front opening of the box body).

The hinge 50 of the second embodiment (particularly the upper hinge 50), like the hinge 10 of the first embodiment, is composed of a pin receiving member 51 with a fixing portion (not shown), a pin receiving portion 53, a connecting portion 54, and a reinforcing rib 55, a main body 56, and a pin member 52 with a hinge pin 57 (shown in FIG. 11) that can be freely inserted and removed in the vertical direction relative to the main body 56. In addition, in the hinge 50, a notch (not shown) is provided in the pin receiving portion 53 of the pin receiving member 51, and a guide surface (not shown) that extends in the front-rear direction from the inside to the outside of the pin hole (not shown) through the notch is provided, so that the hinge 50 can be assembled in the same manner as the hinge 10 of the first embodiment. In addition, 59 in FIG. 11 is a pin lock member for locking the hinge pin 57 in a state where it protrudes upward from the main body 56.

However, unlike the hinge 10 of the first embodiment, the hinge 50 has a restricting protrusion 58 that protrudes forward (toward the pin member 52) on the reinforcing rib 55 of the pin receiving member 51. The restricting protrusion 58 does not impede the rotation of the pin member 52 that accompanies the opening and closing of the door body on the rear side of the pin member 52, but is designed to come close to the surface of the main body 56 of the pin member 52 when the door body is set to a specific opening angle (270 degrees in this case).

Considering the structure of the hinge 50, the load on the pin member 52 that supports the door body and causes the pin member 52 to slip out of the pin receiving member 51 (i.e., the rearward load) is at its maximum when the door body opening angle is set to 270 degrees. However, in the hinge 50, when the door body opening angle is set to 270 degrees, the restricting protrusion 58 comes close to the surface of the main body 56 of the pin member 52, restricting the rearward movement of the pin member 52, i.e., preventing the pin member 52 from accidentally slipping out of the pin receiving member 51.

The door hinge 50 (particularly the upper hinge 50) having the above-mentioned configuration can achieve the same effect as the hinge 10 of the first embodiment, and the reinforcing rib 55 of the pin receiving member 51 is provided with a restricting protrusion 58 that protrudes forward, and when the door is set to a specific opening angle, the restricting protrusion 58 is arranged to be close to the surface of the main body 56 of the pin member 52. This effectively prevents the pin member 52 from moving rearward due to the weight of the door at that opening angle, causing the pin member 52 to inadvertently come out of the pin receiving member 51, i.e., the door body from inadvertently falling off.

(Third Example)
Next, a hinge structure according to a third embodiment of the present invention will be described with reference to FIGS.
Fig. 12 is an explanatory perspective view showing a pin receiving member 61 of the lower hinge according to the third embodiment, which does not have a detachable function. Fig. 13 is an explanatory perspective view showing the pin receiving member 61 in an exploded state. Fig. 14 is an explanatory perspective view showing a pin receiving member 62 of the lower hinge according to the third embodiment, which has a detachable function. Fig. 15 is an explanatory perspective view showing the pin receiving member 62 in an exploded state.

The hinge of the third embodiment (particularly the lower hinge), like the hinge 10 of the first embodiment, is composed of a pin receiving member with a fixed portion 63, a pin receiving portion, a connecting portion 65, and a reinforcing rib 66, a main body, and a pin member (not shown) with a hinge pin that can be freely inserted and removed in the vertical direction relative to the main body. However, the pin receiving member of the hinge of the third embodiment can be arbitrarily selected from two types: a pin receiving member 62 that has a function of attaching and detaching a pin member like the pin receiving member 11 of the first embodiment and the pin receiving member 51 of the second embodiment, and a pin receiving member 61 that does not have a function of attaching and detaching a pin member. In other words, if the pin receiving part is configured by assembling the second pin hole member 68 to the pin receiving main body 67, it becomes the pin receiving member 61 that does not have a detachable function, while if the pin receiving part is configured by assembling the first pin hole member 69 to the pin receiving main body 67, it becomes the pin receiving member 62 that has a detachable function.

The pin receiver body 67 includes a fixing portion 63, a connecting portion 65, and a reinforcing rib 66, which are configured in the same manner as the elements in the hinge 10 of the first embodiment, and also includes an installation portion 70 and an installation rib 71 for installing the first pin hole member 69 and the second pin hole member 68. The installation portion 70 is a cylindrical portion that protrudes upward from the tip of the connecting portion 65, and the tip of the installation portion 70 is provided with a recess into which a part of the first pin hole member 69 and the second pin hole member 68 can be fitted. In addition, an installation notch 72 is provided at the rear of the tip of the installation portion 70, and the inside and outside of the recess of the installation portion 70 are connected via the installation notch 72. Furthermore, the installation rib 71 protrudes upward from the connecting portion 65 along the surface of the installation portion 70 at the rear side of the installation portion 70.

The second pin hole member 68 is integrally formed with a cylindrical support portion 73 having a pin hole through which the butterfly pin of the pin member can be inserted, and a holding portion 74 extending rearward from the support portion 73. The second pin hole member 68 can be assembled to the pin receiver body 67 with the installation notch 72 blocked by fitting the support portion 73 into the installation portion 70 with the pin hole opening upward and placing the holding portion 74 on the installation rib 71. By assembling the second pin hole member 68 to the pin receiver body 67 in this manner, a pin receiver member 61 is formed that does not have a guide surface that guides the butterfly pin inserted into the pin hole out of the pin hole, i.e., does not have a removable function.

On the other hand, the first pin hole member 69 also has a cylindrical support portion 75 with a pin hole into which the butterfly pin of the pin member can be inserted, and a holding portion 76 extending rearward from the support portion 75. However, the support portion 75 of the first pin hole member 69 has a notch 77 for attachment and detachment at the rear. The upper surface (tip surface) of the installation rib 71 and the step surface connecting the inner surface of the pin hole in the pin hole and the notch 77 for attachment and detachment form a series of surfaces extending in the front-rear direction from the inside to the outside of the pin hole through the notch 77 for attachment and detachment, and this surface is a guide surface for guiding the tip of the butterfly pin inside and outside the pin hole when the pin member is attached and detached. Of these guide surfaces, the guide surface 78A outside the pin hole (upper surface of the installation rib 71) is inclined downward as it moves rearward from the notch 77 for attachment and detachment. In addition, the guide surface (step surface) 78B in the pin hole is inclined downward as it moves forward from the notch 77 for attachment and detachment. The first pin hole member 69, like the second pin hole member 68, can be assembled to the pin receiver body 67 with the pin hole opening upward, by fitting the pivot support portion 75 into the installation portion 70 and placing the holding portion 76 on the installation rib 71, and closing the installation notch 72. By assembling the first pin hole member 69 to the pin receiver body 67 in this manner, a pin receiver member 62 having an attachment and detachment function is formed, which allows the butterfly pin to be inserted into the pin hole through the notch 77 for attachment and detachment and to be removed from the pin hole. The first pin hole member 69 and the second pin hole member 68 may be attached to the pin receiver body 67 by using screws or the like, or by using adhesive or the like.

The door hinge (particularly the lower hinge) having the above-mentioned configuration can achieve the same effect as the hinge 10 of the first embodiment, and by selecting whether to assemble the first pin hole member 69 or the second pin hole member 68 to the pin receiving body 67, it can be configured as either the pin receiving member 62 that has the function of attaching and detaching the pin member, or the pin receiving member 61 that does not have the function of attaching and detaching the pin member. Therefore, the configuration of the pin receiving member can be easily changed depending on the usage form and installation mode of the storage box, resulting in a hinge that is easy to use.

In addition, when installing a storage box, a door body that is attached to the box body so that it can open to the right may be replaced so that it can open to the left. In such a case, where pin receiving member 61 was used as the pin receiving member of the lower hinge for right-opening, the pin hole member attached to pin receiving body 67 of said pin receiving member is changed from second pin hole member 68 to first pin hole member 69 to form pin receiving member 62, and said pin receiving member 62 is used to form an upper hinge for left-opening, while the upper hinge for right-opening is made into a lower hinge for left-opening, thereby making it possible to accommodate the replacement of the door body. Therefore, a hinge that is highly versatile and extremely easy to use can be obtained.

The configuration of the hinge structure of the door body in the storage box of the present invention is not limited to the form described in the above embodiment, and the configuration of the box body, door body, and hinges can be appropriately changed as necessary without departing from the spirit of the present invention.

For example, in the above embodiment, notches and guide surfaces are formed on both the upper and lower hinges, but there is no problem if the notches and guide surfaces are provided on only one of the upper or lower hinges.
In addition, in the above embodiment, the guide surface is configured as an inclined surface, but the guide surface may be a horizontal surface, the guide surface outside the pin hole may be a horizontal surface, and the guide surface inside the pin hole may be an inclined surface as described above, or conversely, the guide surface outside the pin hole may be an inclined surface as described above, and the guide surface inside the pin hole may be a horizontal surface, or the guide surface outside the pin hole may be configured to be a combination of a horizontal surface and an inclined surface, and the specific shape of the guide surface may be appropriately designed and modified. The direction in which the guide surface extends is not limited to the direction described in the above embodiment, and as long as it is approximately in the front-back direction, even a direction inclined to the left and right is included in the scope of the present invention.

Furthermore, as the hinge structure of the door body, it is of course possible to provide a different type of hinge in the center in the vertical direction (for example, a conventionally known hinge in which a first pin receiving member is fixed to the box body and a second pin receiving member is fixed to the door body, and a pin member is inserted so as to pass through both pin receiving members).
Furthermore, in the above embodiment, a coil spring is used as the biasing member that holds the tip of the butterfly pin in a protruding position, but there is no problem in using other members, such as a leaf spring, as the biasing member.
In addition, in the above embodiment, the door body is provided to open to the right, but it goes without saying that the present invention can also be suitably adopted as a hinge structure for a door body that opens to the left.

Also, for example, in the second embodiment, the upper hinge is described, but there is no problem if a similar regulating protrusion is provided on the lower hinge. Furthermore, the position and number of the regulating protrusions can be changed as appropriate, and it is also possible to provide them so as to protrude from the fixed part rather than the reinforcing rib. Furthermore, in the second embodiment, the regulating protrusion is provided on the pin receiving member, but the pin member may be provided with a regulating protrusion that protrudes toward the pin receiving member, or a configuration in which a regulating protrusion is provided on both is also possible. In addition, in the second embodiment, the regulating protrusion functions when the opening angle of the door body is 270 degrees, but the opening angle at which the regulating protrusion functions can also be changed as appropriate depending on the direction in which the guide surface extends, etc.
Furthermore, in the third embodiment, the pin receiving member of the lower hinge has been described, but there is no problem in that the pin receiving member of the upper hinge may also be configured by assembling a pin hole member to a pin receiving body.

In addition, as a pin lock member for locking the hinge pin of the pin member, a pin lock member 80 as shown in Fig. 16 and Fig. 17 can be adopted. Here, the mounting structure of the pin lock member 80 in the pin lock member 80 and the pin member 90 will be described. The pin lock member 80 is provided with a block-shaped base 81, a locking claw 82A protruding forward from the upper end of the base 81, a locking claw 82B protruding forward from the lower end of the base 81, a holding piece 83 protruding forward from a location that is the center in the vertical direction on the front surface of the base 81, and a gripping piece 84 extending to the left from the rear surface of the base 81. On the other hand, a mounting recess 93 from which the pin head of the hinge pin 91 protrudes is provided at the bottom of the pin member 90. Also, the mounting recess 93 opens on the surface of the pin member 90 that faces the door body when it is fixed to the door body (an opening 92 is provided at the bottom of the rear surface of the pin member 90). The vertical width of the opening 92 and the mounting recess 93 is approximately the same as the vertical width of the pin lock member 80. Furthermore, a retaining protrusion 94 that protrudes rearward (toward the opening 92) is provided on the front surface of the mounting recess 93 (the surface facing the opening 92). 95 is a pin receiving member that supports the pin member 90.

When it is desired to lock the butterfly pin 91 of the pin member 90 with the pin lock member 80 as described above, the pin lock member 80 is inserted from the front into the mounting recess 93 of the pin member 90. Then, the locking claw 82A locks onto the head of the butterfly pin 91, while the locking claw 82B abuts against the bottom surface of the mounting recess 93, and the tip of the retaining piece 83 hooks onto the retaining protrusion 94, locking the butterfly pin 91 of the pin member 90.

By adopting the pin lock member 80 and the pin member 90 having the above-mentioned configuration, the locking claw 82B abuts against the bottom surface of the mounting recess 93 vertically below where the locking claw 82A engages with the pin head of the hinge pin 91, so that the locking of the hinge pin 91 by the pin lock member 80 is stable. In addition, when the hinge pin 91 is locked, the tip of the retaining piece 83 of the pin lock member 80 hooks onto the retaining protrusion 94 provided in the mounting recess 93, so that the locking of the hinge pin 91 by the pin lock member 80 is further stabilized. Furthermore, by simply reversing the mounting position of the pin lock member 80 to the pin member 90, it is possible to accommodate both cases where it is attached to a left-opening hinge and cases where it is attached to a right-opening hinge, thereby improving versatility.

1: Storage box (box for storing electrical equipment), 2: Box body, 3: Door body, 10, 50: Hinges, 11, 51, 61, 62: Pin receiving member, 12, 52: Pin member, 21, 63: Fixed portion, 22, 53: Pin receiving portion, 24, 55, 66: Reinforcing rib, 26: Pin hole, 27: Cutout, 28: Guiding rib, 29A, 29B, 78A, 78B: Guiding surface, 31: Main body, 32: hinge pin, 33: coil spring (biasing member), 35: opening, 41, 59, 80: pin lock member, 42: spacer member, 43: window, 58: restricting protrusion, 68: second pinhole member, 69: first pinhole member, 70: installation portion, 71: installation rib, 72: installation notch, 73, 75: pivot support portion, 74, 76: holding portion, 77: attachment/detachment notch.

Claims (4)

A box for storing electrical equipment has a box body having an opening on a front surface and a door body for opening and closing the opening. A hinge structure for the door body is interposed between the box body and the door body at an upper portion of the door body, and allows the door body to be freely opened in one direction about an axis in a vertical direction relative to the box body,
The box includes a pin member fixed to the door body and a pin receiving member fixed to the box body,
The pin member has a main body, a hinge pin whose tip protrudes upward from the main body and is retractable from the main body, and a biasing member that biases the hinge pin upward,
the pin receiving member has a fixing portion for fixing to the box body and a pin receiving portion provided at a position a predetermined distance forward of the fixing portion, the pin receiving portion being formed in a tubular shape extending in the vertical direction, and a pin hole into which the hinge pin can be inserted is opened on a lower end surface,
Furthermore, a notch is provided at the rear of the opening of the pin hole, and a guide surface is provided extending in the front-to-rear direction through the notch from inside to outside the pin hole for guiding the tip of the hinge pin from outside the pin hole to inside the pin hole. A box for storing electrical equipment has a box body having an opening on a front surface and a door body for opening and closing the opening. A hinge structure for the door body is interposed between the box body and the door body at a lower portion of the door body, and allows the door body to be freely opened in one direction about an axis in a vertical direction relative to the box body,
The box includes a pin member fixed to the door body and a pin receiving member fixed to the box body,
The pin member has a main body, a hinge pin whose tip protrudes downward from the main body and is retractable from the main body, and a biasing member that biases the hinge pin downward,
the pin receiving member has a fixing portion for fixing to the box body and a pin receiving portion provided at a position a predetermined distance forward of the fixing portion, the pin receiving portion being formed in a tubular shape extending in the vertical direction, and a pin hole into which the hinge pin can be inserted is opened on an upper end surface,
Furthermore, a notch is provided at the rear of the opening of the pin hole, and a guide surface is provided extending in the front-to-rear direction through the notch from inside to outside the pin hole for guiding the tip of the hinge pin from outside the pin hole to inside the pin hole. At least one of the pin member and the pin receiving member is provided with a restricting protrusion that protrudes toward the other side and approaches the other when the opening angle of the door body with respect to the box main body is set to a specific opening angle,
The hinge structure of a door body in a box for storing electrical equipment as described in claim 1 or 2, characterized in that the regulating protrusion regulates the movement of the pin member in a direction along the guide surface when the opening angle of the door body is at the specific opening angle. The pin receiving portion of the pin receiving member includes a first pin hole member having the pin hole, the notch, and the guide surface, and an installation portion on which the first pin hole member can be installed,
A hinge structure of a door body in a box for storing electrical equipment as described in any one of claims 1 to 3, characterized in that a second pinhole member is provided which has the pinhole but does not have the notch or the guide surface, and the second pinhole member can also be installed in the installation portion instead of the first pinhole member.

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