JPH08291822A - Roller with screw - Google Patents

Abstract

PURPOSE: To provide a roller with a screw which reduces a number of part items, reduce a processing steps is easily incorporated in a short time, and produces at a low cost. CONSTITUTION: A roller with a screw is composed of a roller member 1 and a shaft part 2. The roller member 1 is provided with a roller 11 and a plurality of bearing balls 12,...12. The shaft part 2 has a male screw part 21 grooved in its bottom side and a detachment prevention part 24 provided in its upper end. An orbit part 23, which covers the whole circumference and is formed into a circular shape in section, is provided in the bottom side of the detachment prevention part 24. After the roller member 1 is fitted into the orbit part 23 of the shaft part 2, the detachment prevention part 24 is made to deform so as to prevent the roller member 1 from detached, the bearing balls 12,...12 roll on the orbit part 23, and the roller 11 freely rotates in the circumferential direction to the shaft part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a screwed roller which is arranged below a drawer provided in, for example, a desk or a refrigerator and which facilitates the movement of the drawer.

[0002]

2. Description of the Related Art A threaded roller is provided below a drawer provided in, for example, a desk or a refrigerator to facilitate the movement of the drawer and is shown in FIG. 6 as a conventional example. Something like that is known. This is composed of these roller members a, a shaft portion d for supporting the roller members a, and a cylindrical fixing member e. or,
The roller member a has a cylindrical roller a having an inner circumferential portion with a rolling groove a1 over the entire circumference, a cylindrical roller a having an outer circumferential portion with a rolling groove b1 over the entire circumference, and a roller a of the roller a. The bearing balls c ... C incorporated between the rolling groove a1 and the rolling groove b1 of the ball receiver b are provided, and the bearing balls c ... It is designed to be rotatable. On the other hand, the shaft part d is provided with a screw part d1 on the outer circumference on one end side and a support part d2 for supporting the roller member a on the outer circumference on the other end side. Then, the fixing member e is fitted into the supporting portion d2 of the shaft portion d, and the inner peripheral portion of the ball receiver b of the roller member a is fitted into the outer periphery of the fixing member e. The shaft portion d and the roller member a are fixed by pressing and deforming from the upper side and projecting the tip end portion in both the radial inward direction and the radial outward direction, and the roller a is freely movable in the circumferential direction with respect to the shaft portion d. It is designed to be rotatable.

[0003]

However, in this one, the roller member a in which the bearing balls c ... C are incorporated between the roller a and the ball receiver b, the shaft portion d, and the fixing member e. Since it is configured, the number of parts is increased, the number of processing steps is increased, and also in the assembling work, after the fixing member e is inserted into the shaft portion d,
Further, the roller member a incorporating the bearing balls c ... C must be fitted and inserted, which requires a long time for the assembling work.
Because of this, the manufacturing cost is high.

The present invention has been proposed in view of the above circumstances, and provides a threaded roller which can be manufactured easily at a low cost by reducing the number of parts, reducing the processing steps, and easily. The first purpose is to do so.
A second object of the present invention is to provide a threaded roller in which the roller member can be easily assembled in a short time without scratching or deforming the inner peripheral portion of the roller member.

[0005]

The present invention solves the above problems by providing a threaded roller having the following features. The present invention includes a cylindrical roller member 1 and a shaft portion 2 that supports the roller member 1 so as to be rotatable in the circumferential direction. Rolling sliding portions 12 and 13 that slide or roll on the shaft portion 2 are provided on the inner peripheral portion of the roller member 1. The shaft portion 2 includes a screw portion 21 on one end side and a retaining portion 24 integrally formed on the shaft portion 2 on the other end side. Further, a track portion 23 formed around the entire circumference in the circumferential direction is provided between the screw portion 21 and the stopper portion 24. Then, the roller member 1 can freely rotate in the circumferential direction with respect to the shaft portion 2 by the rolling and sliding portions 12 and 13 of the roller member 1 sliding or rolling on the track portion 23. The disengagement prevention portion 24 is deformed so as to project radially outward from the outer periphery of the shaft portion 2 so that a part of the roller member 1 disposed on the raceway portion 23 of the shaft portion 2 is replaced by another portion of the shaft portion 2. It is designed so that it can be covered from the edge side. Then, the roller member 1 is rotatably held at the position of the track portion 23 by the retaining portion 24.

[0006]

In the present invention, the slip-off preventing portion 24 for preventing the roller member 1 disposed on the track portion 23 of the shaft portion 2 from coming off the shaft portion 2 is formed integrally with the shaft portion 2. A fixing member for fixing the shaft portion 2 and the roller member 1 unlike the conventional case can be eliminated, and the number of parts can be reduced.
As a result, the number of processing steps can be reduced and the assembling work can be facilitated. In addition, this stopper 24
Is deformed so as to project radially outward from the outer periphery of the shaft portion 2, and a part of the roller member 1 disposed on the track portion 23 of the shaft portion 2 is covered from the other end side of the shaft portion 2. 1 for shaft 2
It is possible to reliably prevent the rolling sliding parts 12 and 13 of the roller member 1 from coming off the track part 23 of the shaft part 2 after being arranged on the track part 23. Therefore, when the rolling sliding portions 12, 13 of the roller member 1 are arranged on the track portion 23 of the shaft portion 2, the slip-off preventing portion 24 is made smaller in diameter than the inner peripheral portion of the roller member 1 in advance. It suffices to pass the inner peripheral portion of the shaft from the other end side of the shaft portion 2, and it is not necessary to forcibly push the roller member 1 into the shaft portion 2. Therefore, the material of the roller member 1 can be easily assembled regardless of whether it is a synthetic resin, a metal, or the like.
There is no risk of causing scratches or deformations on 2 and 13.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a sectional view of an embodiment of the present invention. The threaded roller of the present invention includes a roller member 1 and a shaft portion 2 that supports the roller member 1 so as to be rotatable in the circumferential direction.

The roller member 1 includes a cylindrical roller 11 and
It is provided with a plurality of bearing balls 12 ... 12 as rolling / sliding parts for rolling the shaft portion 2. The roller 11 is made of a synthetic resin, and is provided with a rolling groove 11a formed by denting the inner circumference of the roller 11 in a radially outward direction in a semicircular cross section. It can be rolled along the rolling groove 11a.
Further, a flange portion 11b is formed above the rolling groove 11a in the inner peripheral portion of the roller 11. In the present embodiment, the flange portion 11b is provided so as to protrude in the radial direction over the entire circumference of the rolling groove 11a. On the other hand, on the upper surface of the roller 11 above the flange 11b, a recess 11c is formed over the entire circumference at a predetermined depth from the upper surface. The material of the roller 11 is not limited to the one made of synthetic resin, but may be made of metal or the like.

As shown in FIG. 2, the shaft portion 2 is provided with a male screw portion 21 on the outer periphery on the lower end side, and a support portion 22 for supporting the roller member 1 is formed on the outer periphery on the upper side. A track portion 23 is provided on the outer periphery of the lower end portion of the support portion 22. The track portion 23 is for rolling the bearing balls 12 ... 12 of the roller member 1, and is formed in an arc-shaped cross section over the entire circumference. Also, the upper side of the track portion 23,
The diameter of the roller member 1 is smaller than that of the roller member 1, and a retaining portion 24 is formed at the upper end portion. This stopper 24
Is for preventing the roller member 1 from coming off from the track portion 23 after the roller member 1 is assembled to the track portion 23. In the present embodiment, a predetermined depth is set in the axial direction from the upper end surface of the shaft portion 2. By forming a hole 25 with a circular cross section, a thin wall portion is formed over the entire circumference of the hole 25, and this thin wall portion is used as the retaining portion 24. In this embodiment, the thickness t of the retaining portion 24 is set to be approximately the same as the depth of the recess 11c of the roller member 1, but the invention is not limited to this and the recess 11c is not limited thereto.
It may be formed thicker or thinner than the depth. Further, the retaining portion 24 may be partially provided instead of being provided over the entire circumference.

A tool engaging hole 26 is provided on the lower surface of the hole 25. Since the tool engagement hole 26 is for engaging a tool such as a driver, the tool engagement hole 26
By rotating a driver or the like engaged with the shaft portion 2, the shaft portion 2 is rotated so that the male screw portion 21 can be screwed into another member.

In order to assemble and rotatably support the roller member 1 on the shaft portion 2 constructed as described above, first, the plurality of bearing balls 1 are formed in the rolling grooves 11a of the roller 11.
2 ... 12 are fitted, and in this state, the inner peripheral portion is passed through the support portion 22 of the shaft portion 2 from the upper end side. At this time, since the diameter of the slip-off preventing portion 24 formed at the upper end is smaller than the inner diameter of the inner peripheral portion of the roller 11, it can be easily passed. Therefore,
For example, when the roller 11 is made of a deformable synthetic resin and the inner peripheral portion is formed to have a smaller diameter than the shaft portion 2 and is forcefully fitted into the shaft portion 2, the inner peripheral portion may be damaged. ,
Although it will be deformed, such scratches and deformation can be prevented by making the diameter of the slip-off preventing portion 24 smaller than the inner diameter of the inner peripheral portion of the roller 11 as described above.

As a result, the bearing balls 12 ... 1
2 can roll between the track portion 23 of the support portion 22 and the rolling groove 11a of the roller 11, and the roller 11 can freely rotate in the circumferential direction with respect to the shaft portion 2 via the bearing balls 12 ... It will be in a state to get. After that, as shown in FIG. 1, the retaining portion 24 of the shaft portion 2 is pressed radially outward from the inside of the hole 25, and the distal end side of the retaining portion 24 is bent by bending from the base end side of the retaining portion 24. Expanded diameter to prevent disengagement 2
The tip of No. 4 is deformed to such an extent that the tip of No. 4 enters the recess 11c of the collar 11b. As a result, the retaining portion 24 becomes
12 is covered over the entire circumference thereof with a slight gap, and the roller 11 and the bearing balls 12 ... 12 are prevented from coming off from the support portion 22 of the shaft portion 2. Further, by being prevented from coming off, the bearing balls 12 ... 12 are maintained on the raceway portion 23, and the raceway portion 23 is always rolled. On the other hand, the deformed retaining portion 24 and the upper surface of the roller 11 are substantially flush with each other, and the appearance can be aesthetically pleasing.

According to the above, the roller member 1 including the roller 11 and the bearing balls 12 ... 12 and the shaft portion 2 can be constituted, and the number of parts can be reduced as compared with the conventional one, and the number of processing steps can be reduced. . Moreover, at the time of assembling, the roller 11 in which the bearing balls 12 ... 12 are fitted may be put in the shaft portion 2, and the assembling work can be easily performed in a short time. Further, since the retaining portion 24 is also integrally formed from the shaft portion 2, a fixing member for fixing the shaft portion 2 and the roller member 1 unlike the conventional case is not necessary, and the number of parts is further increased. The number of processing steps can be reduced. Therefore, it can be manufactured at low cost.

The screwed roller of the present invention thus constructed can be used for various things such as a drawer of a desk or a drawer for storing food provided in a refrigerator, for example, a drawer of a desk. In this case, as shown in FIGS. 5 (A) and 5 (B), the male screw portion 21 of the shaft portion 2 is inserted into the screw holes provided in the desk body T at the left and right positions on the lower front portion of the drawer H.
It is fixed by screwing with a tool such as a screwdriver. As a result, the outer periphery of the roller 11 contacts the lower surface of the drawer H, and the roller 11 rotates as the drawer H moves. Therefore, the resistance when the drawer H moves is reduced, and even when the drawer H becomes heavy due to the housed member, the drawer H can be easily operated.

In this embodiment, the roller 11 and the collar portion 11 are provided.
b is provided, and the collar portion 11b is provided with the retaining portion 24 so that the shaft portion 2
Although it does not come off from the inside, for example, as shown in FIG. 3, the collar portion 11b is not provided, and the retaining portion 24 is deformed and arranged above the bearing balls 12, ... It is possible to prevent the bearing balls 12 ... 12 from coming off, and even in this case, the roller 11 will be the bearing ball 1 after being assembled in the shaft portion 2.
Since it does not come off from 2 ... 12, the roller 11 and the bearing balls 12 ... 12 can be prevented from coming off. In addition, in this embodiment, the slip-off preventing portion 24 is deformed so as to project only in the radial direction, whereby the roller 11
The bearing balls 12 ... 12 are prevented from coming off, but the present invention is not limited to this, and they may be deformed so as to project to both sides in the radial outside direction and the radial inside direction.

In this embodiment, the roller member 1 is composed of the roller 11 and the bearing balls 12 ... 12 and the bearing balls 12 ... 12 are used as the rolling sliding parts of the roller member 1. Instead of the balls for bearings, a ring having a circular cross section is used, and the roller 11 rolls on the ring, or the ring rolls and slides on the track portion 23 of the shaft portion 2, whereby the roller 11 rotates with respect to the shaft portion 2. You may make it move.

Further, for example, as shown in FIG. 4, instead of the bearing balls, the rolling sliding portion 13 may be integrally formed on the roller 11. Specifically, roller 11
The rolling sliding part 13 is provided so as to project radially inward in an arcuate cross section over the entire circumference of the inner peripheral part of the sliding part 13 so that the sliding part 13 is fitted to the track part 23 of the shaft part 2. The roller 11 may be configured to be rotatable in the circumferential direction with respect to the shaft portion 2 by rolling and sliding the rail portion 13 on the track portion 23. By doing so, the roller member 1 and the shaft portion 2 can be constituted by two members, and the number of parts can be further reduced and the structure can be simplified.
Further, when a plurality of bearing balls are mounted on the roller 11, it takes time to drop the bearing balls, but the operation can be omitted. Therefore, the roller member 1 can be obtained at a lower cost, and the roller member 1 can be fitted to the shaft portion 2 even at the time of assembling, and can be performed more easily and in a shorter time.

On the other hand, the hardness of the raceway portion 23 in the shaft portion 2 is not particularly limited, for example, when it is used for a heavy drawer or the like, and it is preferable to make the hardness of the raceway portion 23 hard. For this, heat treatment may be performed to adjust to a predetermined hardness before use. Further, in that case, when heat treatment is applied to the entire shaft portion 2 to increase the hardness of the raceway portion 23, the slip-off preventing portion 24 is also hard and difficult to be deformed. After hardening the hardness of the above, only the part of the retaining portion 24 may be partially annealed. Alternatively, only the portion of the track portion 23 may be partially hardened by induction hardening or the like to be hard, and the portion of the retaining portion 24 may not be hard.

[0019]

As described above, according to the present invention, the fixing member for fixing the shaft portion and the roller member can be eliminated, the number of parts can be reduced, the number of processing steps can be reduced, and the assembling can be performed. Work can be done easily.
Further, after the roller member is disposed on the raceway portion of the shaft portion, the slip-off preventing portion can surely prevent the rolling sliding portion of the roller member from coming off the raceway portion of the shaft portion. When disposing the sliding part on the track part of the shaft part, the slip-off preventing part may be made smaller in diameter than the inner peripheral part of the roller member in advance, and the inner peripheral part of the roller member may be passed from the other end side of the shaft part. It is not necessary to force the roller member into the shaft. Therefore, the roller member can be easily assembled regardless of whether it is made of synthetic resin, metal, or the like, and there is no risk of scratches or deformation of the rolling / sliding part during assembly.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a shaft portion before mounting a roller.

FIG. 3 is a sectional view of another embodiment.

FIG. 4 is a sectional view of still another embodiment.

5A is a cross-sectional explanatory view of a state in which the drawer is attached to a desk, and FIG. 5B is a cross-sectional explanatory view of the usage state.

FIG. 6 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller member 2 Shaft part 11 Roller 12 Bearing ball 21 Male screw part 23 Track part 24 Detachment prevention part

Claims (1)

[Claims] 1. A roller member (1) having a cylindrical shape, and a roller member.
The roller member (1) is provided with a shaft portion (2) which is rotatably supported in the circumferential direction, and the inner peripheral portion of the roller member (1) slides or rolls the shaft portion (2). ) (13), the shaft part (2) has a screw part (21) at one end and the shaft part at the other end.
(2) is integrally formed with a retaining portion (24), and further formed between the screw portion (21) and the retaining portion (24) in the circumferential direction over the entire circumference. A raceway portion (23) is provided, and this raceway portion (23) is used as a rolling sliding portion (12) (1) of the roller member (1).
When the roller member (1) slides or rolls and the roller member (1)
It is designed to be freely rotatable in the circumferential direction with respect to (2), and the slip-out prevention part (24) is deformed so as to project radially outward from the outer periphery of the shaft part (2), so that the slip-out prevention part (24) covers a part of the roller member (1) arranged on the track portion (23) of the shaft portion (2) from the other end side of the shaft portion (2). 24) allows the roller member (1) to
3) A threaded roller characterized by being rotatably held in a position.