JPH03175282A - Shelf device of refrigerator - Google Patents

Abstract

PURPOSE:To prevent an abnormal sound from being generated by a method wherein a driving gear, a turning gear, a gear shaft and spur gears are rotated under a rotation of a dial, a rack is moved up and down and can be rotated and moved up and down concurrently on right and left racks and material quality of the driving gear and the turning gear is made of resin containing oil therein for either one or both of gears. CONSTITUTION:When a dial 6 is rotated, a dial shaft 7 and a driving gear 8 are rotated. Thus, a turning gear 9 is rotated and spur gears 5 at both sides are rotated together with a gear shaft 4. Right and left spur gears 5 are fixed to the gear shaft 4 and rotated in the same manner to each other, so that they may be moved up and down in the same manner at the right and left sides of the shelf 1 and no positional displacement in right and left heights occurs. Since the turning gear 9 combined with the driving gear 8 made of polyacetar is molded by resin containing plyacetal, an abnormal noise during transmittance of a driving power is prevented from being generated and in addition since lubricant oil is independently dispersed, resulting in that lubricant oil is not consumed a smooth sliding caused by the effect of lubrication can be attained.

Description

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

2. Description of the Related Art Conventionally, this type of refrigerator shelf apparatus has been disclosed, for example, in US Pat. No. 2,841,459.

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. The enclosed tray μ was installed vertically at the left and right sides of the interior of the refrigerator, and the screw jack was installed vertically at the center of the interior of the refrigerator. Then, by turning the shaft with the handle and fitting it into the screw jack, the old nut was rotated to change the position of the nut and change the position of the frame holding the shelf.

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.
This is due to the frame fixed by screws installed in the center of the interior of the refrigerator, so if food is placed off to either the left or right side of the shelf, the shelf with the most food will become cluttered. The roller contacts the rail diagonally and does not rotate smoothly, requiring a large force to turn the shaft with the handle bΔ. In addition, since there is a shaft with a handle and a screw jack in the center of the shelf, and the structure is relatively large, there is also a problem with the food storage surface on the lower shelf or lower tier.

In addition, in a combination of a drive gear and a rolling gear as a power transmission mechanism, if the drive gear and rolling gear are made of the same material, the hardness of the materials will be the same, resulting in abnormal noises during power transmission and failure to achieve smooth power transmission. .

The present invention improves the above-mentioned problems of the conventional refrigerator shelf device, prevents the shelves from tilting from side to side, allows the shelves to be moved with a relatively small force, and does not interfere with food storage in the lower part of the refrigerator. To provide a shelf device that eliminates abnormal noise when moving it up and down.

Means for Solving the Problems For the above-mentioned purpose, the refrigerator shelf device of the present invention includes a shelf disposed inside the refrigerator, a substantially U-shaped frame that holds the shelf, and a rear left and right corner of the frame. a sliding member attached to the frame, a gear shaft with a spur gear fixed to the left and right ends attached to the back of the frame, a dial rotatably supported on either the left or right front side of the frame, and the dial. a dial shaft connected to the dial shaft; a drive gear having a screw-like tooth profile fixed to the dial shaft; and at least one of the drive gears is formed of an oleoresin and is fixed to the gear shaft and has a waveform that meshes with the drive gear. a sliding groove that is formed in the left and right vertical directions at the back of the refrigerator and that holds at least a portion of the sliding member in a sliding manner; The rack includes a rack that meshes with the spur gear formed in the direction.

Function: Since the refrigerator shelf device of the present invention has the above configuration, when the dial is rotated, the drive gear is rotated.

Therefore, the rolling gear and the gear shaft that mesh with it rotate, thereby making it possible to move the rack up and down by the rotation of the spur gears at both ends of the gear shaft. Therefore, the shelf and frame can be rotated up and down on the left and right racks at the same time. Because of this, the sliding member moving up and down within the sliding structure can slide smoothly without being tilted diagonally, so the operating force for the dial can be reduced.

Furthermore, by using oil-impregnated resin for both or one of the drive gear and rolling gear, it is possible to provide a refrigerator shelf device that prevents the generation of abnormal noise.

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

In the figure, 1 is a shelf on which food is placed. Reference numeral 2 denotes a frame that holds the shelf 1, and is formed by a left frame 2a, a right frame 2b, and a rear frame 2C that connects the left and right frames 2a and 2b.

3B is a sliding member attached to the rear left and right sides of the frame 2, and 3a and 3b are an upper roller and a lower roller that constitute the sliding member 3. Also, upper and lower rollers 3a.

3b is formed of a metallic shirt 3c. The upper roller 3a and the lower roller 3b are the same. 4B is a gear shaft rotatably attached to the back of the frame 2, to which flat gears 5 fixed at both left and right ends are attached. 6 is a dial rotatably attached to the dial hole 2d in the front part of the right frame 2b, holder is a dial shaft connected to this dial 6, and 8 is fixed to this dial shaft 7 and is screwed. This drive gear is usually called a worm gear and is made of polyacetal and has a tooth profile 8a.

Reference numeral 9 indicates a tooth profile 9a machined obliquely to the rotation axis, that is, the gear shaft 4, so as to mesh along the threaded front of the drive gear 8, and a tooth tip 9b parallel to the gear shaft 4. The gear shaft 4 is located adjacent to the spur gear 5 on the right side of the hole.
This is a rolling gear, usually called a helical gear, which is fixed to the shaft and molded from polyacetal oleoresin. 10 is the inside of the refrigerator. 11 is an outer box made of iron plate of the refrigerator body.

12 is an inner box molded from resin. 13 is.

This is a foamed heat insulating material filled between the outer box 11 and the inner box 12. 14 is a rail fixed to the rail groove 12a of the inner box 12 with screws or the like. 14a is a sliding groove formed in the rail 14, which accommodates at least a portion of the spur gear 5 and the sliding members 3, that is, the upper roller 3a, the lower roller, and 3b, and slidably holds them.

14b is a rack that meshes with the spur gear 5 formed (in the vertical direction) of the sliding R14a of V-/I/14. Note that the width dimension W of the sliding groove 14a is the width of the upper roller 3a and the lower roller 3.
It should be about 0.1 to 1 larger than the outer diameter of b. The upper roller 3a, the lower roller 3b, and the spur gear 5 are located on the same line, and the upper 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 5 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.

! In this embodiment, as shown in FIG. 4, the frame 2 has a spur gear 5, a drive gear 8. The shape is such that the rolling gear 9 is covered from the inside of the refrigerator. The upper roller 3a is formed at the upper end of the housing frame 2 and has a flange 20 with a narrow clearance between the rail 140 and the slider 1!1t14a.

Covers spur gear 6. Next, reference numeral 15 denotes a control l provided with an air passage inside to cool the inside 10 of the refrigerator.
Al at Levernel.

When moving the sum 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 groove diamond/I/6. 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 5 moves into the sliding groove 14 via the gear shaft 4.
It moves while meshing with the rack 14a on the front side inside a, but since the left and right spur gears 5 are fixed to the gear shaft 4 and rotate in the same way, the frame 2, i.e. 81, moves up and down in the same way on the left and right sides, and there is no difference in height between the left and right sides. .

Does not occur. As a result, the sliding member 3 moving up and down within the sliding groove 14a can slide smoothly without being tilted diagonally, so that the operating force for the dial 6 can be reduced.

In addition, in this embodiment, the upper and lower rollers sa and 3b (roller shirt) 3c 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. Since it can be reduced, the operating force for the dial 6 can be extremely small. Next, when the shelf 1 is moved to the desired position 1 using the dial 6 and then stopped, the shelf 1 or frame 2 tends to fall down due to the weight of the shelf 1 and frame 2 and the weight of the food on the shelf 1. do. As a result of this force, the spur gear 5 first tries to rotate. Therefore, the gear shaft 4 and the rolling gear 9 try to rotate, but the rolling gear 9 is meshed with the drive gear 8, and it is mechanically impossible to rotate the rolling gear 9 by rotating the drive gear 8. Although it is easy to say, the force for rotating the threaded tooth profile 8a of the driving gear 8 by the tooth profile 9a of the rolling gear 9 is generated by the tooth profile 9a of the rolling gear 9 meshing with the tooth profile 8a of the driving gear 8 in a direction substantially perpendicular to the tooth profile 8a of the driving gear 8. The abrasion force becomes extremely large, and it is impossible to rotate the drive gear 8 by the rolling gear 9. Therefore, shelf 1
In the stopped state, the drive gear 8 and the rolling gear 9 serve as a stopper mechanism, and even when food is placed on the shelf 1, the shelf 1 does not go down and is held at that position. Furthermore, in this embodiment, the upper roller 3a, the lower roller 3b, and the spur gear 5 are located deep inside the frame 2 in the same vertical direction.
As the load applied to the shelf 1 increases, the upper roller 3a comes into closer contact with the front side surface of the sliding groove 14a, and the lower roller 3b comes into stronger contact with the rear side surface of the sliding groove 14a, causing the flat gear to 5 engages the rack 14b more strongly and their rotational frictional force increases, so the frame 2 holding the shelf 1 is firmly held in that position, and the shelf 1 is prevented from falling or tilting from side to side.

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 embodiment, the right frame 2b is a dial shaft,
Door, drive gear 8, rolling gear 9, spur gear 6, gear shaft 4 on the rear frame 2c, spur gear 5 on the left frame 2a
Since it is covered, there is no problem of food hitting and damaging each gear, etc., and there is no problem of it getting in the way of storing food in the lower part of the case. Since it is aligned with the rack 14b in the sliding groove 14a, the rail can be made smaller.

The width of the sliding groove 14a that slides and holds the upper roller 3a and the lower roller 3b in the housing is only slightly larger than the outer diameter of the upper roller 3a and the lower roller 3b, and the upper roller 3a and the lower roller 3b are Since the upper roller 3 is inserted into the sliding groove 14a with a distance between the upper roller 3 and the food
a comes into contact with the back surface of the sliding groove 14a, and the lower roller comes into contact with the front surface of the sliding groove 14a, so the misalignment of the shelf 1 is caused by
It's so slight that it doesn't become a problem.

In addition, since the rolling gear combined with the rolling gear 8 molded from polyacetal is usually a helical gear consisting of a tooth profile 9a and a tooth tip 9b, molding is required in the production process. Molded from polyacetal oleoresin, the shape allows for easy removal from the mold, which prevents abnormal noises during power transmission, and allows the added lubricating oil to be dispersed closely and independently. Therefore, the lubricating oil is not consumed, and the lubrication effect allows smooth sliding.

As described in detail, the refrigerator shelf device of the present invention includes a shelf disposed in the refrigerator, a substantially U-shaped frame that holds the shelf, and a frame attached to the rear left and right sides of the frame. A sliding member, a gear shaft with spur gears fixed to the left and right ends attached to the back of the frame, a dial rotatably supported on either the left or right front side of the frame, and a dial shaft connected to the dial. a driving gear fixed to the dial shaft and having a screw-shaped tooth profile; and a rolling gear, one of which is made of oleoresin and fixed to the gear shaft and having a waveform that overlaps with the driving gear. a gear, a sliding groove formed in the left and right vertical directions at the back of the refrigerator and in which at least a portion of the sliding member is accommodated and held therein for sliding and movement; Since a rack is disposed that meshes with the formed spur gear, when the dial is rotated, the drive gear rotates, and the rolling gear and gear shaft that mesh with it rotate up and down on the rack by the rotation of the spur gears at both ends. can do. Therefore, the shelf and frame can be raised and lowered while being held horizontally by spur gears that simultaneously rotate up and down on the left and right racks. As a result, the sliding member moving up and down within the sliding groove can slide smoothly without being tilted diagonally, so the operating force for the dial can be reduced. In addition, the dial, dial shaft, drive gear, rolling gear, and spur gear are located near the inside side of the refrigerator for a simple structure, so they do not get in the way when placing food on the food surface at the bottom of the shelf. do not have. By using oil-impregnated resin as the molding material for the housing, drive gear, and rolling gear, we are able to supply refrigerator shelving devices that have a lubricating effect that allows for smooth sliding and prevents noise during power transmission. It becomes possible.

[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. 5 is a front view, and FIG. 8 is a sectional view of the main part of the right frame viewed from the side. 1...Shelf, 2...Frame, 2e...
...Flange, 3...Sliding member, 3a...
...Upper roller, 3b...Lower roller, 4...
...gear shaft, 6...°spur gear, 6...
...Dial, 7...Dial shaft,
8...°・Drive gear, 9...Rolling gear, 1
0... Inside the refrigerator, 14... Rail, 14a
...Sliding groove, 14b...Rack.

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 dial rotatably supported on either the left or right front surface of the frame; a dial shaft connected to the dial; and a drive gear fixed to the dial shaft and forming a threaded tooth profile. a rolling gear, at least one of which is formed of an oleoresin, is fixed to the gear shaft, and has a waveform that meshes with the drive gear; A shelf device for a refrigerator, comprising a sliding groove that houses and slidably holds a refrigerator, and a rack that engages with the spur gear formed adjacent to the sliding groove in the horizontal and vertical directions inside the refrigerator.