JPH08219634A - Rail device for drawer - Google Patents

Abstract

PURPOSE: To obtain a rail device for a drawer having a smooth guiding function by coupling a plate, a gusset and rail in a close contact state by a locking mechanism made of a locking protrusion to be engaged with the locking hole of the gusset. CONSTITUTION: A case 3 is engaged with its opening disposed at the upper side and with a back surface disposed at the lower side by inserting the ends of the locking parts 27 of a first locking mechanism 23 and a second locking mechanism provided at a rail 5 into the plate through hole 24 of a plate 2 via an oblique surface, elastically deforming the plate 2 and press injecting the protrusion 26 of the first mechanism 23 into the hole 24. A gusset 7 is brought into contact with the plate 2, and the part 27 of the mechanism 23 is inserted into the gusset through hole 25 via the oblique surface 30. In this state the gusset 7 is slid toward the front end of the rail 5, and the locking protrusion 29 of the mechanism 23 is engaged with the locking hole 28 of the gusset 7. Thus, the rail 5 is mounted at the plate 2 by the locking mechanism and the gusset 7, thereby bringing the annular protrusion 31 into close contact with the inner surface of the case 3 of the plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer rail device used as a guide mechanism for opening / closing operations of a drawer type door of a refrigerator.

[0002]

2. Description of the Related Art FIGS.
FIG. 6 is a view showing a conventional rail device for drawer shown in Japanese Patent No. 590, FIG. 6 is an exploded perspective view of the rail device for drawer, and FIG. 7 is a drawer of a refrigerator provided with the rail device for drawer of FIG. FIG. 8 is a vertical cross-sectional view of a main part of the door, and FIG. 8 is a view corresponding to FIG. 7 for explaining an assembled state of the drawer rail device of FIG.

In the figure, (1) is an outer box of a refrigerator made of steel plate, and (2) is a plate body forming a box body (3) consisting of an inner box made of a synthetic resin plate by vacuum forming. (4) is a heat insulating material such as polyurethane resin filled between the outer box (1) and the box body (3), (5) is a rail made of synthetic resin having a groove-shaped cross section, and the plate body (2 ) Is mounted in a recessed state (6) provided inside the box body (3) in an embedded state. (7) is a gusset that is fitted to the outside of the box (3) of the recess (6).

The nut (9) is inserted through the plate body (2) and the front end of the gusset (7), and the insertion end is fixed to the gusset (7).
The stepped shaft fastened to the box body (3) and mounted in the box body (3), (10) is a support roller pivotally supported by the stepped shaft (8) and arranged in the box body (3), and (11) is a cabinet. Frames that respectively support both sides of the inner case (12), and (13) are frame rollers that are pivotally attached to the rear end of the frame (11) via projecting shafts and are arranged in the grooves of the rails (5). .

(14) is a rail made of pop rivets, etc.
Rail fasteners for fastening (5) to plate (2), (15) plate (2)
A gusset fastener for inserting the gusset (7) to the plate body (2) by being inserted into the plate, (16) is a seal for a heat insulating material arranged between the plate body (2) and the gusset (7), and (17) is A nut-side heat insulating material seal disposed on the outer surface of the nut (9), and a jig (18) used when filling the heat insulating material (4).

The conventional drawer rail device is constructed as described above, and the plate body (2) is reinforced by the gussets (7) embedded in the heat insulating material (4). (10) is installed. Also, the gusset (7) is recessed (6)
The rail (5) is reinforced by being fitted to the outside of the box body (3) in a fitted state.

Then, the rail (5) is set as described below.
Etc. are assembled. That is, with the box body (3) with the opening facing upward and the back surface facing down, the rail (5) is recessed (6) in the plate body (2).
Is fitted to. The rail (5) is then the rail fastener (14)
Is fastened to the plate body (2). Further, the heat insulating material (4) wraps around the gusset (7) between the plate body (2) and leaks from the stepped shaft (8) insertion hole of the plate body (2) to the inside of the box body (3). Insulation seals (16) are applied to prevent this.

In order to prevent the heat insulating material (4) from flowing into the gusset (7) through the hole of the nut (9) and leaking to the inside of the box (3), the outer surface of the nut (9) is covered. The nut side heat insulating material seal (17) is attached. Next, the gusset (7) is fixed to the plate body (2) by the gusset fastener (15), and the outer box (1)
A heat insulating material (4) is filled between the box and the box (3).

In order to prevent the rail (5) from being deformed or cracked due to foaming pressure when the heat insulating material (4) is filled, the jig (18) is preliminarily installed in the groove of the rail (5) from the inside of the box (3). Mated. next,
Stepped shaft (8) from inside the box (3) to plate (2) and gusset (7)
Inserted into the support roller (10) and fastened to the nut (9).
Is mounted in the box (3).

The frame roller (13) is fitted in the groove of the rail (5) from the rear end of the frame (11). Then
The frame (11) is arranged on the support roller (10), and the internal case (12) is attached to the arranged frames (11) on both sides. As a result, as shown in FIG. 7, the case 12 inside the refrigerator is supported by the support roller via the frame 11 and the frame roller 13.
It is supported by (10) and rails (5).

[0011]

SUMMARY OF THE INVENTION In the conventional drawer rail device as described above, the rail fastener (14) prevents the rail from being drawn.
The (5) and the plate body (2) are fastened at one place. Therefore, the rail (5) may be displaced toward the inner side of the box (3) from the inner side of the box (3). At this time, the side surface of the frame roller (13) moving and the rail (5) come into contact with each other, and the opening / closing operation of the drawer type door (not shown) is hindered. Also, during many years of use plate (2)
When the heat insulation material (4) is peeled off, the rail (5) is lifted. It should be noted that if the rail (5) is further fastened to the plate body (2) on the inner side of the box body (3), the manufacturing cost will increase.

Further, since the rail (5) and the plate body (2) are fastened at one place, if there is a difference in the position of the nut (9), the support roller (10) will not be mounted in a predetermined position, and the drawer (9) will be pulled out. The door may be tilted or the opening / closing operation of the drawer door may be hindered. Also, since the support roller (10) is installed after filling the heat insulating material (4), the heat insulating material seal (16) and the nut side heat insulating material seal (17) are attached to prevent leakage of the heat insulating material (4). Is required.

For this reason, the cost of the seal parts and the manufacturing cost for the sticking work increase. In addition, there is a problem that the heat insulating material (4) leaks due to a defective attachment position of the seal component. In addition, when the drawer type door is pulled out, the runout in the horizontal direction orthogonal to the opening / closing direction of the frames (11) on both sides may increase. At this time, the frame
There is a problem that the pull-out door may come off when (11) deviates from the support roller (10).

The present invention has been made to solve the above problems, and an object thereof is to obtain a drawer rail device having a simple device structure and a smooth guiding function.

[0015]

In the drawer rail device according to the present invention, a gusset arranged outside the box body of the plate body forming the box body, and a rail arranged inside the box body of the plate body. , A protruding portion provided on a surface of the rail facing the plate body and projecting through a through hole provided in the gusset and the plate body, and a tip of the protruding portion is extended along the length of the rail. A locking mechanism is provided, and a locking mechanism including a locking projection that is disposed at the tip of the locking part and faces the plate body and that fits into the locking hole of the gusset.

Further, in the drawer rail device according to the present invention, a gusset arranged outside the box body of the plate body forming the box body, and a rail arranged inside the box body of the plate body,
A protrusion provided on the surface of the rail facing the plate body and protruding through the through hole provided in the gusset and the plate body, and the tip of the protrusion extends along the length of the rail. A surface of the rail plate facing the locking mechanism, which includes a locking portion and a locking projection that is provided at the tip of the locking portion and faces the plate body and that fits into the locking hole of the gusset. And a ring-shaped convex portion that is provided so as to protrude and that is disposed so as to surround the periphery thereof apart from the protrusion.

Further, in the drawer rail device according to the present invention, a gusset arranged outside the box body of the plate body forming the box body, and a rail arranged inside the box body of the plate body,
A protrusion provided on the surface of the rail facing the plate body and protruding through the through hole provided in the gusset and the plate body, and the tip of the protrusion extends along the length of the rail. A stopper, a locking mechanism that is disposed at the tip of the locking part and that is provided facing the plate and that fits into the locking hole of the gusset; An upper flange and a lower flange that are provided at the edge of the groove-shaped side wall opening and are superposed on the inside of the box body of the plate body are provided.

Further, in the drawer rail device according to the present invention, a gusset arranged outside the box body of the plate body forming the box body, and a rail arranged inside the box body of the plate body,
A protrusion provided on the surface of the rail facing the plate body and protruding through the through hole provided in the gusset and the plate body, and the tip of the protrusion extends along the length of the rail. A locking mechanism including a locking part and a locking convex part that is arranged at the tip of the locking part and faces the plate body and fits into the locking hole of the gusset, and the end of the rail close to the box body opening. A convex portion that is provided in the portion and that protrudes inward of the box body and that faces the side surface of the object guided by the rail.

Further, in the drawer rail device according to the present invention, a gusset arranged outside the box body of the plate body forming the box body, and a rail arranged inside the box body of the plate body,
A protrusion provided on the surface of the rail facing the plate body and protruding through the through hole provided in the gusset and the plate body, and the tip of the protrusion extends along the length of the rail. The locking mechanism, which includes a locking portion and a locking convex portion that is provided at the tip of the locking portion and faces the plate body and that fits into the locking hole of the gusset, and projects from the plate body to the outside of the box body. And a protrusion arranged at a position in contact with the rear end face of the box body of the gusset.

[0020]

In the drawer rail device constructed as described above, the plate body, the gusset, and the rail are closely coupled by the locking mechanism.

In addition, in the drawer rail device constructed as described above, the plate body, the gusset and the rail are closely coupled by the locking mechanism. In addition, the annular convex portion is arranged outside the through hole provided in the plate body and closely contacts the inside of the box body of the plate body.

Further, in the drawer rail device configured as described above, the plate body, the gusset and the rail are closely coupled by the locking mechanism. Further, the upper flange and the lower flange are arranged so as to overlap with each other inside the box body of the plate body to reinforce the plate body.

In addition, in the drawer rail device constructed as described above, the plate body, the gusset and the rail are closely coupled by the locking mechanism. Further, the lateral displacement perpendicular to the guide direction of the object guided by the rail is restricted by the convex portion provided at the end portion of the rail near the box opening.

Further, in the drawer rail device configured as described above, the plate body, the gusset and the rail are closely coupled by the locking mechanism. In addition, the protrusions provided outside the box body from the plate body hold the rear end of the box body of the gusset at a predetermined position on the plate surface.

[0025]

【Example】

Example 1. 1 to 5 are views showing an embodiment of the present invention, and FIG. 1 is an exploded perspective view of a drawer rail device,
2 is a vertical sectional view of a main part of a drawer type door of a refrigerator provided with the drawer rail device of FIG. 1, FIG. 3 is a horizontal sectional view of a rail rear end portion of FIG. 2, and FIG. 4 is a rail front end portion of FIG. 5 is a horizontal sectional view of FIG. 5, and FIG. 5 is a view corresponding to FIG. 2 for explaining an assembled state of the drawer rail device of FIG.

In the figure, (1) is an outer box of a refrigerator made of steel plate, (2) is a plate forming a box (3) consisting of an inner box made of a synthetic resin plate by vacuum forming, (4) ) Is the outer box (1)
A heat insulating material such as polyurethane resin filled between the box and the box (3). (5) is a rail made of synthetic resin having a groove-shaped cross section, which is mounted in a recessed portion (6) provided inside the box body (3) of the plate body (2) in an embedded state, and has a groove-shaped opening edge. Upper flange on part (19)
And a lower flange (20) is provided.

(7) is a gusset mounted on the outside of the box (3) of the recess (6) in a fitted state, (8) is the front end of the rail (5), and the plate (2)
And a stepped shaft that is inserted into the gusset (7) and the insertion end is fastened to a nut (9) fixed to the gusset (7) and is arranged in the box body (3), and (10) is a stepped shaft. Support rollers pivotally supported by (8) and arranged inside the box (3), (11) a frame that supports both sides of the case (12) in the refrigerator, and (13) a rear end of the frame (11). The frame roller pivotally attached to the rail part via the protruding shaft and arranged in the groove of the rail (5), the (21) is projectingly provided on the rail (5), and the through hole for inserting the stepped shaft (8) ( It is a convex portion arranged above 22).

Reference numeral (23) is a first locking mechanism provided near the front end of the rail (5). The first locking mechanism is provided on the surface of the rail (5) facing the plate body (2) and protrudes from the plate body (2). A gap is formed in the plate through hole (24) provided, and the gusset through hole is provided in the gusset (7) and is longer in the longitudinal direction of the rail (5) than the plate through hole (24). A protruding part (2
6), the tip of the protruding part (26) is arranged at the tip of the locking part (27) and the locking part (27) extended along the length of the rail (5) to the inner side of the box (3). Are provided at the tips of the locking projections (29) and the locking portions (27) that are provided so as to face the plate body (2) and fit into the locking holes (28) of the gusset (7), and the tips are rails. It is composed of a slope (30) inclined in a direction away from (5).

The reference numeral (31) is an annular convex portion provided on the surface of the rail (5) facing the plate body (2) and protruding, and an annular convex portion (32) arranged around the circumference apart from the protruding portion (26). A protrusion protruding from the plate body (2) to the outside of the box body (3) and arranged at a position in contact with the rear end face of the gusset (7). (18) is a jig for injecting the heat insulating material (4) of the rail (5).

Reference numeral (33) is a second locking mechanism provided near the rear end of the rail (5) and has substantially the same structure as the first locking mechanism (23). That is, the plate body through hole (24) provided on the protruding plate body (2) provided on the surface of the rail (5) facing the plate body (2)
A protrusion (26) that is inserted with a gap formed in it, and the tip of the protrusion (26) is extended to the inner side of the box (3) along the length of the rail (5) and the locking portion (27). Also, a slope (30) is provided at the tip of the locking portion (27) and the tip is inclined in the direction away from the rail (5).

In the drawer rail device constructed as described above, the rail (5) and the like are assembled in the following manner. That is, the first locking mechanism (23) provided on the rail (5) in the plate body through-hole (24) of the plate body (2) with the box body (3) with the opening facing up and the back surface facing down. ) And the locking portion of the second locking mechanism (33)
(27) The tip is inserted through the slope (30). Then the plate
By elastically deforming (2), the projecting portion (26) of the locking mechanism is press-fitted and fitted into the plate through hole (24).

Then, the gusset (7) is applied to the plate body (2), and the tip of the engaging portion (27) of the first engaging mechanism (23) is inserted into the gusset through hole (25) through the slope (30). To be done. In this state, gusset
Slide (7) toward the front end of the rail (5) to move the first locking mechanism (2
The locking projection (29) of 3) is fitted into the locking hole (28) of the gusset (7). Further, the locking projection (29) is fitted in the locking hole (28), and at this time, the rear end of the gusset (7) is the protrusion (32) of the plate body (2).
The gusset (7) is held at a predetermined position on the surface of the plate body (2) by facing the gusset.

In this way, the rail (5) is attached to the plate body (2) by the locking mechanism and the gusset (7). Further, by this, the annular convex portion (31) is brought into close contact with the inner surface of the box body (3) of the plate body (2). Therefore, it is possible to prevent a problem that the injected heat insulating material (4) leaks to the inner surface of the box body (3) through the gap between the projecting portion (26) and the plate body through hole (24). Therefore, it is possible to obtain an extra member such as a seal part and the number of steps for attaching the extra member, and to obtain a drawer rail device that does not have a problem that the heat insulating material (4) leaks.

Next, the stepped shaft (8) has a rail (5) and a plate (2).
And, it is inserted into the gusset (7) and fastened to the nut (9),
The support roller (10) is mounted in the box (3). If the support roller (10) is installed in the box (3) before the heat insulating material (4) is injected, the plate body (2) facing the side surface of the support roller (10) when the heat insulating material (4) is injected. The place cannot be supported by the jig (18).

Therefore, when the heat insulating material (4) is injected, the jig (18) is
The plate body (2) that is not supported by this deforms. On the other hand, the rail (5) is provided with an upper flange (19) and a lower flange (20), and the heat insulating material is provided through these flanges.
The plate (2) is supported by the jig (18) during the injection of (4). Therefore, the support roller (10) during the injection of the heat insulating material (4)
The rigidity of the flange can prevent deformation of the plate body (2) facing the side surface.

Next, a heat insulating material is provided between the outer box (1) and the box body (3).
(4) is injected and foamed, and the protrusion (26) of the locking mechanism and the gusset (7) are embedded in the heat insulating material (4). As a result, even if the drawer type door is repeatedly opened and closed for a long period of time, the rail (5) is held at a predetermined position in the box body (3). Therefore, it is possible to prevent a problem that the opening and closing of the drawer type door is hindered. Thus, it is possible to obtain the drawer rail device which has a simple structure and can be easily manufactured at a low cost.

Further, since the convex portion (21) is provided above the through hole (22) for inserting the stepped shaft (8) of the rail (5), the drawer type door that has been pulled out is orthogonal to the pulling direction. When it is pressed in the horizontal direction and the frame (11) is laterally displaced, it hits the convex portion (21). This prevents excessive displacement during lateral displacement of the frame (11), preventing deformation and damage of related members such as the frame (11) and maintaining the normal guiding function of the drawer-type door. be able to.

Further, although the locking projection (29) of the first locking mechanism (23) is fitted in the locking hole (28) of the gusset (7), a slight gap causes the gusset (7) to move. Nut (9) and rail
Misalignment occurs between the stepped shaft (8) and the through hole (22) for inserting the shaft. However, the rear end of the gusset (7) is the protrusion (32) of the plate (2).
Since the gusset (7) is held at a predetermined position on the surface of the plate body (2) by facing to, it is possible to prevent the occurrence of misalignment between the nut (9) and the through hole (22). Therefore, the support roller (10) can be easily attached at a predetermined position.

Embodiment 2 FIG. The embodiment of FIGS. 1-5 is constructed as follows. That is, in FIGS.
The gusset (7) is attached to the plate body (2) by fitting the locking projection (29) of the first locking mechanism (23) into the locking hole (28) of (7). On the other hand, by forming a locking projection on the gusset (7) and fitting the locking projection into the locking hole formed on the first locking mechanism (23), the gusset (7) Plate (2)
It is configured to be attached to.

Even in such a structure, the rail (5) is attached to the plate body (2) by the locking mechanism and the gusset (7). Therefore, although detailed description is omitted, it is obvious that the same operation as that of the embodiment of FIGS. 1 to 5 can be obtained in such an embodiment.

[0041]

As described above, according to the present invention, the gusset is arranged outside the box body of the plate body forming the box body, the rail is provided inside the box body of the plate body, and the rail is opposed to the plate body. A protrusion provided on the surface and protruding through a through hole provided in the gusset and the plate body, a locking portion in which the tip of the projection extends along the length of the rail, and the locking portion And a locking mechanism that is provided at the tip of the plate and faces the plate body and that includes a locking projection that fits into the locking hole of the gusset.

As a result, the plate body, the gusset and the rail are tightly coupled by the locking mechanism. Therefore, it is possible to prevent the injected heat insulating material from leaking to the inner surface of the box through the gap between the projecting portion of the locking mechanism and the plate through hole. Further, there is an effect of obtaining a drawer rail device which does not require an unnecessary member such as a seal part and a labor for mounting the unnecessary member, has a simple structure, and can be easily manufactured at a small cost.

As described above, according to the present invention, the gusset is arranged outside the box body of the plate body forming the box body, the rail is provided inside the box body of the plate body, and the rail is opposed to the plate body of the rail. A protrusion provided on the surface and protruding through a through hole provided in the gusset and the plate body, a locking portion in which the tip of the projection extends along the length of the rail, and the locking portion The locking mechanism, which is provided at the tip of the rail and faces the plate body, and which is composed of a locking projection that fits into the locking hole of the gusset, and the rail, which is provided on the surface facing the plate body, projects from the protruding portion. And an annular convex portion which is arranged so as to be separated from the surrounding area.

As a result, the plate member, the gusset and the rail are tightly connected by the locking mechanism. In addition, the annular convex portion is arranged outside the through hole provided in the plate body and closely contacts the inside of the box body of the plate body. Therefore, it is possible to prevent the injected heat insulating material from leaking to the inner surface of the box through the gap between the projecting portion of the locking mechanism and the plate through hole. Further, there is an effect of obtaining a drawer rail device that does not require extra members such as seal parts and the number of steps for attaching extra members, has a simple configuration, and can be easily manufactured at a low cost.

Further, since the annular convex portion is in close contact with the inside of the box body of the plate body, the problem that the injected heat insulating material leaks to the inner surface of the box body through the gap between the projecting portion of the locking mechanism and the plate body through hole is further effective. Can be prevented. As a result, it is possible to save unnecessary members such as seal parts and the number of steps for mounting the unnecessary members, and it is possible to obtain a pull-out rail device which does not have a problem that the heat insulating material leaks out at a low cost.

Further, according to the present invention, as described above, the gusset is arranged outside the box body of the plate body forming the box body, and the rail is provided inside the plate body box. A projecting portion provided on the opposing surface and penetrating through a through hole provided in the projecting gusset and the plate body, a locking portion in which the tip of the projecting portion extends along the length of the rail, and the locking A locking mechanism that is provided at the tip of the portion and faces the plate body, and that includes a locking projection that fits into the locking hole of the gusset;
An upper flange and a lower flange, which are provided at a groove-shaped side wall opening edge portion of a rail having a groove cross section and are superposed and arranged inside a box body of a plate body, are provided.

As a result, the plate body, the gusset and the rail are tightly connected by the locking mechanism. Further, the upper flange and the lower flange are arranged so as to overlap with each other inside the box body of the plate body to reinforce the plate body. Therefore, it is possible to prevent the injected heat insulating material from leaking to the inner surface of the box through the gap between the projecting portion of the locking mechanism and the plate through hole. Further, there is an effect of obtaining a drawer rail device which does not require an unnecessary member such as a seal part and a labor for mounting the unnecessary member, has a simple structure, and can be easily manufactured at a small cost.

Further, the upper flange and the lower flange are superposed on each other inside the box body of the plate body to reinforce the plate body, and the edges of the upper flange and the lower flange are supported by the jig when the heat insulating material is injected. . For this reason, it is possible to prevent the plate body from being deformed at a portion where the jig cannot support it when the heat insulating material is injected. Therefore, when the heat insulating material is poured, the plate body that cannot be supported by the jig can be normally maintained, and the guide function of the drawer rail device can be smoothed.

As described above, according to the present invention, the gusset is arranged outside the box body of the plate body forming the box body, and the rail is provided inside the box body of the plate body. A projecting portion provided on the opposing surface and penetrating through a through hole provided in the projecting gusset and the plate body, a locking portion in which the tip of the projecting portion extends along the length of the rail, and the locking A locking mechanism that is provided at the tip of the portion and faces the plate body, and that includes a locking projection that fits into the locking hole of the gusset;
The rail is provided with a convex portion provided at an end portion near the opening of the box body and protruding inside the box body and facing a side surface of an object guided by the rail.

As a result, the plate body, the gusset and the rail are tightly connected by the locking mechanism. Further, the lateral displacement perpendicular to the guide direction of the object guided by the rail is restricted by the convex portion provided at the end portion of the rail near the box opening. Therefore, it is possible to prevent the injected heat insulating material from leaking to the inner surface of the box through the gap between the projecting portion of the locking mechanism and the plate through hole. Further, there is an effect of obtaining a drawer rail device which does not require an unnecessary member such as a seal part and a labor for mounting the unnecessary member, has a simple structure, and can be easily manufactured at a small cost.

Further, the lateral displacement of the rail guided by the rail perpendicular to the guiding direction is restricted by the convex portion of the rail near the opening of the box body. As a result, it is possible to prevent deformation and damage of related members such as objects guided by the rails. Therefore, the guide function of the drawer rail device can be maintained in a normal state, and there is an effect of smoothing the guide function.

As described above, according to the present invention, the gusset is arranged outside the box body of the plate body forming the box body, and the rail is provided inside the box body of the plate body. A projecting portion provided on the opposing surface and penetrating through a through hole provided in the projecting gusset and the plate body, a locking portion in which the tip of the projecting portion extends along the length of the rail, and the locking A locking mechanism that is provided at the tip of the portion and faces the plate body, and that includes a locking projection that fits into the locking hole of the gusset;
The gusset is provided so as to project from the plate body to the outside of the box body and is arranged at a position in contact with the rear end surface of the box body of the gusset.

As a result, the plate body, the gusset and the rail are tightly coupled by the locking mechanism. In addition, the protrusions provided outside the box body from the plate body hold the rear end of the box body of the gusset at a predetermined position on the plate surface. Therefore, it is possible to prevent the injected heat insulating material from leaking to the inner surface of the box through the gap between the projecting portion of the locking mechanism and the plate through hole. Further, there is an effect of obtaining a drawer rail device which does not require an unnecessary member such as a seal part and a labor for mounting the unnecessary member, has a simple structure, and can be easily manufactured at a small cost.

In addition, by the protrusion provided from the plate,
The rear end of the gusset box is held at a predetermined position on the plate surface. As a result, the gusset and the rail are held in the normal position without being displaced, and there is an effect that the assembly of the pull-out rail device such as mounting of the support roller is facilitated.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a perspective view showing an exploded rail device for drawer.

2 is a longitudinal sectional view of a main part of a drawer type door of a refrigerator provided with the drawer rail device of FIG. 1;

3 is a horizontal sectional view of a rear end portion of the rail shown in FIG.

4 is a horizontal cross-sectional view of the front end of the rail shown in FIG.

5 is a view corresponding to FIG. 2 for explaining an assembled state of the drawer rail device of FIG. 1.

FIG. 6 is a diagram showing a conventional drawer rail device, and is a perspective view showing the drawer rail device in an exploded manner.

FIG. 7 is a vertical cross-sectional view of a main part of a drawer type door of a refrigerator provided with the drawer rail device of FIG. 6;

8 is a view corresponding to FIG. 7 for explaining an assembled state of the drawer rail device of FIG. 6.

[Explanation of symbols]

2 plates, 3 boxes, 5 rails, 7 gussets, 19
Upper flange, 20 Lower flange, 21 Convex part, 23
First locking mechanism (locking mechanism), 24 Plate body through hole, 25
Gusset through hole, 26 Projection part, 27 Locking part, 28
Locking hole, 29 Locking convex part, 31 Annular convex part, 32 Protrusion.

Claims (5)

[Claims] 1. A gusset arranged outside the box body of a plate forming a box, a rail arranged inside the box body of the plate, and a surface of the rail facing the plate body. A projecting portion provided and projecting through a through hole provided in the gusset and the plate body, a locking portion having a tip of the projecting portion extended along the length of the rail, and the locking portion A pulling-out rail device having a locking mechanism that is disposed at the tip of the plate, faces the plate body, and has a locking projection that fits into the locking hole of the gusset. 2. A gusset arranged outside the box body of a plate body forming a box body, a rail arranged inside the box body of the plate body, and a surface of the rail facing the plate body. A projecting portion provided and projecting through a through hole provided in the gusset and the plate body, a locking portion having a tip of the projecting portion extended along the length of the rail, and the locking portion Is provided on the surface of the rail facing the plate, and the locking mechanism, which is provided at the tip of the rail and faces the plate, and includes a locking projection that fits in the locking hole of the gusset. A rail device for pulling out, comprising: an annular convex portion that is arranged so as to project from the projecting portion and surround the circumference thereof. 3. A gusset arranged outside the box body of a plate body forming a box body, a rail arranged inside the box body of the plate body, and a surface of the rail facing the plate body. A projecting portion provided and projecting through a through hole provided in the gusset and the plate body, a locking portion having a tip of the projecting portion extended along the length of the rail, and the locking portion And a groove-shaped side wall of the rail having a groove shape in cross section, the locking mechanism being provided at the tip of the rail and facing the plate body, the locking mechanism including a locking projection that fits in the locking hole of the gusset. A pull-out rail device provided with an upper flange and a lower flange which are provided at an opening edge portion and overlap each other inside the box body of the plate body. 4. A gusset arranged outside the box body of a plate forming a box, a rail arranged inside the box body of the plate, and a surface of the rail facing the plate body. A projecting portion provided and projecting through a through hole provided in the gusset and the plate body, a locking portion having a tip of the projecting portion extended along the length of the rail, and the locking portion Is provided at the tip end of the rail and is provided at the end of the rail near the box body opening and a locking mechanism that is provided facing the plate and that fits in the locking hole of the gusset. And a protruding portion that protrudes inside the box body and faces a side surface of an object guided by the rail. 5. A gusset arranged outside the box body of a plate body forming the box body, a rail arranged inside the box body of the plate body, and a surface of the rail facing the plate body. A projecting portion provided and projecting through a through hole provided in the gusset and the plate body, a locking portion having a tip of the projecting portion extended along the length of the rail, and the locking portion A locking mechanism that is provided at the tip of the plate and that faces the plate body, and that includes a locking projection that fits into the locking hole of the gusset; and the locking mechanism that projects from the plate body to the outside of the box body. A rail device for pulling out, which comprises a protrusion arranged at a position in contact with a rear end face of the box body of the gusset.