JPH03175280A - Shelf device of refrigerator - Google Patents

Abstract

PURPOSE:To prevent a dangerous condition from occurring in which a damage of each of segments caused by an erroneous operation is produced by a method wherein spur gears at both right and left ends are rotated concurrently by a driving device for rotating a gear shaft to move up and down a rack and a shelf can be rotated and moved up and down concurrently and smoothly and further a stopper projection is provided at an upper part of a rail. CONSTITUTION:When a dial 6a is rotated, a dial shaft 7 and a driving gear 8 are rotated. Thus, a turning gear 9 engaged with the driving gear 8 is rotated and spur gears 5 at both sides are rotated together with a gear shaft 4. Spur gears 5 at right and left sides are fixed to the gear shaft 4 and rotated in the same manner to each other, so that a sliding member 3 moved up and down in the same manner as the right and left sides of the shelf 1 and moved up and down in a sliding groove 14a is not inclined, but can be smoothly slid. In order to prevent a breakage and damage of each of segments including a flange 2e caused by an erroneous operation of a user, a stopper projection 14 is fixed to an upper part of a rail 14.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a shelf device for a refrigerator, which is used inside a refrigerator and whose vertical position can be changed.

2. Description of the Related Art Conventionally, this type of refrigerator shelf device is shown in, for example, U.S. Pat. No. 2,841,459.
c.

This conventional refrigerator shelf device includes a shelf disposed inside the refrigerator, a frame that holds the shelf, two rails that slide and hold rollers supported on the left and right sides of the frame, and a frame that supports the frame. Equipped with screws and jacks for fixing in any position. The frame rotatably held a nut fitted into the screw jack and a shaft with a handle for rotating the nut. Further, the rails were installed vertically on the left and right sides of the interior of the refrigerator, and the screws were installed vertically at the center of the interior of the refrigerator. Then, by turning the shaft with the handle and rotating the nut fitted into the screw jack, the position of the nand was changed and the position of the frame holding the shelf was changed.

Problems to be Solved by the Invention The conventional refrigerator shelf device described above has a structure that allows the shelves to be moved up and down.
The frame is fixed by screws installed in the center of the interior of the refrigerator, so if food is placed on either the left or right side of the shelf, the shelf with the most food will become cluttered and the rollers will The handle-equipped shaft had to be turned with great force because it contacted the rail diagonally and did not rotate smoothly. In addition, the shaft with handle and screw jack in the center of the shelf are 6D, and the structure is relatively large, so there was a problem in terms of storing food on the lower shelf or lower tier.

! Furthermore, when the frame is raised, an erroneous operation that may occur when the frame reaches a certain height limit may result in damage to sliding parts and dials.

The present invention improves the above-mentioned problems of the conventional refrigerator shelf device, thereby preventing the shelf from moving from side to side, and allowing the shelf to be moved with a relatively small force, so that it does not interfere with food storage at the bottom. The purpose is to provide even more safety as a shelf device for a refrigerator, and also to provide further safety by using a nut-tight structure to prevent damage to the device by being placed at a certain height.

Means for Solving the Problems For the above-mentioned purpose, the refrigerator shelf device of the present invention includes a shelf arranged in the refrigerator, a substantially U-shaped frame that holds the shelf, and a shelf on the rear left and right sides of the frame. A sliding member attached to the frame 9, a gear shaft with a spur gear fixed to the left and right ends attached to the back of the frame, a drive device for rotating this gear shaft or the spur gear, and a sliding member attached to the back of the refrigerator a sliding groove formed in the direction and housing at least a portion of the sliding member and slidingly holding the sliding member; It consists of a rail forming a rack and a stopper protrusion provided on the top of the rail and protruding toward the inside of the refrigerator.

Function: Since the refrigerator shelf device of the present invention has the above-described configuration, the spur gears at both left and right ends can be rotated simultaneously by the drive device that rotates the gear shaft or spur gears, and the rack can be moved up and down. Therefore, the shelf and frame can be smoothly rotated up and down on the left and right racks at the same time. Because of this, the sliding member moving up and down in the sliding groove can slide smoothly without being obliquely obstructed.Furthermore, by providing a stopper protrusion at the top of the V, when the upper limit of the height is reached, Contact with the frame can be visually confirmed, and since the stopper protrusion comes into contact with the frame body, it is possible to prevent the risk of damage to various parts due to erroneous operation that may occur at that time.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings of FIGS. 1 to 8.

3 in the figure, 1 is a shelf on which food is placed. 2 are the frames that hold the shelf 1, the left frame 2a and the right frame 2b
It is formed by a rear frame 2C that connects the left and right frames 2a and 2b.

Reference numeral 3 denotes sliding members attached to the rear left and right sides of the frame 2, and 3a and 3b are an upper roller and a lower roller constituting the sliding member 3. Also, upper and lower rollers 3a.

3b are each made of a metallic shirt 3c. Note that the upper roller 3a and the lower roller 3b are the same. 4 is a gear shaft rotatably attached to the back of the frame 2, and fixed flat gears 5 are attached to both left and right ends of the gear shaft. 6a is a dial rotatably attached to the dial hole 2d in the front part of the right frame 2b;
is a dial shaft connected to this dial 6a, and 8 is a driving gear fixed to this dial shaft 7 and usually called a worm gear. 9 is the right spur gear 6
A transfer gear, usually called a helical gear, is fixed to the gear shaft 4 adjacent to the gear shaft 4. 10 is inside the refrigerator. 11 is the iron plate outer box of the refrigerator itself. 12 is an inner box whose bottom is made of resin. 13 is a foamed heat insulating material filled between the outer box 11 and the inner box 12. 14 is the inner box 12
This is a rail fixed to the rail groove 12a with screws or the like. Reference numeral 14a denotes a sliding groove formed in the tray /v14, which accommodates at least a portion of the spur gear 6 and the sliding members 3, that is, the upper roller 3a and the lower roller 3b, and slidably holds them. 14b is a material different from that of the spur gear 5, and the sliding groove 14a of the rail 14 is made of a material different from that of the spur gear 5.
This is a rack that meshes with a spur gear 6 formed in the vertical direction. 14c is the flange 2 attached to the frame 2
This is a stopper protrusion to prevent damage to various parts that occurs when the rail comes into contact with the upper limit of the rail. The width dimension W of the button sliding groove 14a is the upper loaf 3a and the lower roller 3b.
It is about 0.1 to 1-larger than the outer diameter of. The upper roller 3a, the lower roller 3b, and the spur gear 6 are located on the same line, and the roller 3a is in contact with the front surface of the sliding groove 14a, and the lower roller 3b is in contact with the front surface of the sliding groove 14a. The spur gears 6 are arranged on the left frame 2a and the right frame 2b, respectively, so as to be in contact with the rear surface and mesh with the rack 14b. Further, in this embodiment, as shown in FIG. 4, the frame 2 includes a spur gear 5, a drive gear 8. It is shaped so as to cover the transfer gear 9 from the inside of the refrigerator. Also, a flange 2e formed at the upper end of the frame 2 and provided with a narrow gap between the sliding groove 14a of the Renil 14
covers the upper roller 3a and the spur gear 6. Next, reference numeral 16 is a control panel provided with an air passage or the like inside to cool the interior 10 of the refrigerator.

When moving the shelf 1 of the refrigerator shelf device of this embodiment upward or downward, the dial shaft 7 and the drive gear 8 are rotated by rotating the housing dial 6a. Therefore, the rolling gear 9 that meshes with the drive gear 8 rotates, and the gear shaft 4 and the spur gears 5 on both sides rotate. At this time, the spur gear 6 is inserted through the gear shaft 4 into the sliding groove 14a and into the rack 14 on the front side.
However, since the left and right spur gears 6 are fixed to the gear shaft 4 and rotate in the same manner, the frame 2, that is, the shelf 1, moves up and down in the same manner as on the left and right sides, and no deviation in height between the left and right sides occurs. This allows the sliding member 3 that moves up and down within the sliding groove 4a to slide smoothly without being obliquely inclined, so that the operating force for the dial 6a can be reduced. In addition, in this embodiment, the roller shafts 3c of the upper and lower rollers 3a and 3b are made of metal, so even if many foods are placed on the shelf 1, the upper and lower rollers 3a and 3b do not tilt and rotate smoothly, reducing frictional force. Therefore, the operating force for the dial 6a can be extremely small. Next, when the shelf 1 moves to the dial 6a at the desired position 1 and then stops, the shelf 1, that is, the frame 2, will fall down due to the weight of the shelf 1 and frame 2 and the weight of the food on the shelf 1. shall be.

As that power! The spur gear 5 attempts to rotate.

Therefore, the gear shaft 4 and the transfer gear 9 try to rotate, but the transfer gear 9 meshes with the drive gear 8, and it is mechanically difficult to rotate the transfer gear 9 in the same way as the drive gear 8. However, the tooth profile 9a of the rolling gear 9
The force that rotates the screw-shaped tooth profile 8a of the drive gear 8 is caused by the fact that the tooth profile 9a of the rolling gear 9 meshes with the tooth profile 8a of the drive gear 8 in a substantially perpendicular direction, so that the frictional force is not extremely large. It is not possible to rotate the drive gear 8 by the rolling gear 9. Therefore, when the shelf 1 is stopped, the driving gear 8 and the transfer gear 9 act as a stopper mechanism, and the shelf 1
Even if food is placed on top, the shelf 1 does not go down and is held in that position. Then operate the dial 6a so that the frame 2 and shelf 1 exceed the desired height and the rail 14
Even if there is a situation where the height is raised to the upper limit of 1, due to user's incorrect operation (such as rotating dial 6 to the rising side even though the height limit has been reached). A stopper protrusion 140 is installed on the top of the rail 14 in order to prevent breakage and damage to various parts including the flange 2e.
It also solves the above problems.

As explained above, in the refrigerator shelf device of this embodiment, even the case in which food is placed on the shelf 1 does not require a large force to move the shelf 1, and the shelf 1 does not tilt.

In this example, dial 6a, dial shirt)
7+! @ Moving gear 8. The rolling gear 9 is called a drive device 6.

As described in detail, the refrigerator shelf device of the present invention comprises a shelf disposed inside the refrigerator, a substantially U-shaped frame that holds the shelf, and a rack mounted on the left and right sides of the back of the frame. a sliding member mounted at the back of the refrigerator, a gear set with spur gears fixed to the left and right ends attached to the back of the frame, a drive device for rotating this gear shaft or spur gear, and A sliding groove b in which at least a portion of the sliding member is accommodated and slidably held therein, and a rack is arranged adjacent to the sliding groove, which is formed in the horizontal and vertical directions at the back of the refrigerator and engages with the spur gear. Therefore, the shaft can be smoothly rotated up and down by the rotation of the spur gears at both ends of the gear shaft, which is rotated by the drive device. Therefore, the shelf and 71/-m can be raised and lowered to the housing which is kept horizontal by spur gears that simultaneously rotate up and down on the left and right ladders. Furthermore, a stopper protrusion is installed on the upper part of the rail of the rack formed in the left and right vertical directions at the back of the refrigerator to prevent damage to the drive unit and the flanges provided to cover them due to incorrect operation when ascending. Particularly, the above problems will be solved. From the above, the sliding members that move up and down within the sliding groove can slide smoothly without any trouble at an angle, and the upper limit of the rail section can also be avoided to prevent damage to various parts due to incorrect operation by the user. It becomes possible to use refrigerator shelf devices.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional perspective view of a refrigerator to which an embodiment of the present invention is applied, Fig. 2 is an exploded perspective view of a frame used in this embodiment, and Fig. 3 is an enlarged sectional view of main parts of this embodiment. FIG. 4 is an enlarged perspective view of the main part, FIG. 6 is a front view, FIG. 8 is a sectional view of the main part as seen from the side of the right frame, and FIG. 9 is a perspective view of the main part of the upper part of the rail. 1...Shelf, 2...Frame, 3...
...Sliding member, 4...Gear shaft, 6...
... Spur gear, 6... Drive device, 10...
...Inside the refrigerator, 14...Rail, 14a...
...Sliding groove, 14b...Rack, 14C...
...Stopper protrusion.

Claims (1)

[Claims] A shelf installed inside the refrigerator, a substantially U-shaped frame that holds the shelf, sliding members attached to the back left and right of the frame, and a flat frame attached to the left and right ends attached to the back of the frame. A gear shaft having a fixed gear, a drive device for rotating the gear shaft or the spur gear, and a sliding groove formed in the left and right vertical directions at the back of the refrigerator and housing at least a portion of the sliding member and holding it in a sliding manner. A refrigerator comprising a rail that is formed adjacent to this sliding groove in the horizontal and vertical directions inside the refrigerator and forms a rack that engages with the spur gear, and a stopper protrusion that is provided on the top of this rail and protrudes toward the inside of the refrigerator. shelving device.