JP2013063222A - Utensil height adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the rotation of a height adjusting member which performs height adjustment caused by loosening by the vibration or the like of a wheel, and to suppress the change of the height of an adjusted table or the like.SOLUTION: This utensil height adjusting device is characterized in that: a female screw hole 7f is formed at either of an upper A side and a lower B side in a use state at the lower part of an utensil and a fitting hole 7g is formed at the other of the sides; the holes are made to coaxially communicate with each other; the height adjusting member 9 is coaxially and integrally formed with a male screw 9a and a fitting part 9b; the male screw 9a is screwed into the female screw hole 7f; the fitting part 9b is fit into the fitting hole 7g; and the wheel 6c is arranged below the height adjusting member 9.

Description

  The present invention relates to a furniture height adjusting device, and more particularly to a device for adjusting the height of furniture such as office and home tables, desks, chairs, wagons, furniture, and the like.

  Conventionally, in a fixture such as a table, the height of the fixture is adjusted by providing a nut body in the lower end portion of the support leg of the fixture, and screwing a bolt-like member provided on the wheel side to the nut body. What adjusts the height of a fixture by forward / reverse rotation of a member is known (refer to patent documents 1).

JP 2001-104077 A

  In the conventional structure, since the wheel is supported only by the bolt-shaped member and the nut body, there is a problem that the height of the adjusted fixture changes due to the bolt-shaped member loosely rotating due to vibration of the wheel in use or the like. .

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a height adjusting device for a fixture that solves the above-described problems and increases the bearing strength of the wheel to improve durability.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that, in the lower part of the fixture, a female screw hole is provided on one of the upper side and the lower side in use and a fitting hole is provided on the other side, and these are coaxial. As shown in FIG. 1, the height adjusting member in which the male screw part and the fitting part are integrally formed on the same axis is screwed into the female screw hole, and the fitting part is fitted into the fitting hole. And a wheel is provided at a lower portion of the height adjusting member.

  According to a second aspect of the present invention, in the first aspect of the present invention, at least one of the female screw hole and the fitting hole is formed by a separate member from the support portion of the fixture.

  According to a third aspect of the present invention, in the second aspect of the present invention, the receiving member is fixed in the support portion provided at the lower part of the fixture so that the axial direction thereof is the vertical direction when in use. In addition, a female screw hole is provided on either the upper side or the lower side in the axial direction of the receiving member, a fitting hole is provided on the other side, and the female screw hole and the fitting hole are coaxially communicated with each other. It is what.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the wheel is a caster that revolves around a shaft eccentric with the axle.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the lower part of the height adjustment member has a larger diameter than the outer diameter of the fitting portion and the outer diameter of the male screw portion. The rotation operation unit is provided.

  The invention according to claim 6 is the invention according to any one of claims 3 to 5, wherein the receiving member is formed of a resin.

  According to the present invention, the outer peripheral surface of the fitting portion of the height adjustment member and the inner peripheral surface of the fitting hole on the fixture side are formed so as to be close to each other, thereby providing a wheel in use. When a load in a direction perpendicular to the axial direction is applied to the height adjustment member, the load can be supported by both the male screw part and the fitting part of the height adjustment member. Compared with what is supported, the frictional resistance against rotation of the height adjusting member can be increased. Therefore, at the time of use, it can suppress that a height adjustment member loosens and rotates by the vibration of a wheel, etc., and can suppress that the height of the adjusted fixture changes.

  Furthermore, by providing the receiving member in the support portion provided in the lower part of the fixture and providing the height adjusting member in the receiving member, the height adjusting member can be supported in the receiving member with high accuracy. Therefore, it is not necessary to increase the processing accuracy of the inner peripheral surface of the support portion and the outer peripheral surface of the receiving member, and it can be easily assembled to a supporting leg having a variation in diameter, thereby reducing the manufacturing cost. .

  According to the fourth aspect of the present invention, in the case where an eccentric load acts on the support shaft, such as a caster, the eccentric load is supported by both the male screw portion and the fitting portion. The bearing strength is increased, the load resistance is large, and the durability is improved.

  According to the fifth aspect of the present invention, the height adjustment member can be easily rotated by the rotation operation unit.

The side view of the table provided with the height adjustment apparatus of Example 1 of this invention. The figure which raised the wheel in the sectional side view which shows the height adjustment apparatus of Example 1 of this invention. The figure which lowered | hung the wheel with the sectional side view which shows the height adjustment apparatus of Example 1 of this invention. FIG. 3 is a side sectional view of the receiving member of FIG. 2. The top view of FIG. The bottom view of FIG. The sectional side view of a height adjustment member. The top view of FIG. The bottom view of FIG. FIG. 7 shows Embodiment 2 of the present invention, in which (a) is a side sectional view of a support portion, and (b) is a side view of a height adjusting member.

An embodiment in which the present invention is applied to a leg portion of a flap table will be described with reference to FIGS.
[Example 1]
1 to 9 show a first embodiment, and FIG. 1 shows a flap table 1 equipped with a height adjusting device of the present invention, which is located on the left and right sides of the top plate 2 (the front and back direction of the paper surface of FIG. 1). A pair of support legs 3, 4 positioned in the front-rear direction are provided, and a top plate 2 is provided at the upper end of the support legs 3, 4 so as to be able to be tilted about the rotation shaft 5.

  Wheels 6c are provided at the lower ends of the four support legs 3 and 4 located in the front-rear and left-right directions. In the embodiment, a caster in which the wheel 6c rotates on a plane around a vertical support shaft eccentric from the rotation center, that is, a caster in which the wheel 6c revolves around the axle 6d and an eccentric support shaft 6a. Using.

  Since the height adjusting devices of the respective wheels 6c are the same, one height adjusting device for one supporting leg 3 will be described with reference to FIGS.

  In addition, let the upper side in the use state of FIGS. 1-3 which assembled | attached each part be the upper part A, and let the lower side be the lower part B. FIG.

  The support leg 3 is formed of a hollow cylinder, and a lower end portion thereof constitutes a support portion 3a. As shown in FIGS. 2 and 3, the support portion 3 a is formed so as to be perpendicular to the floor surface F when the axis XX is in use, and the lower end thereof is open. Let this opening part be 3b. In the embodiment shown in the figure, the support leg 3 is formed of a metal cylindrical pipe together with the support portion 3a.

The shape of the support 3a may be any shape as long as the opening 3b is provided below.
A receiving member 7 is press-fitted and fixed in the support portion 3 a of the support leg 3. The receiving member 7 is formed in a cylindrical shape concentric with the axis XX of the support portion 3a, and has a female screw hole forming portion 7j on the lower side and a fitting hole forming portion 7k on the upper side. The lower end portion has a hook-like stopper portion 7a, which are integrally formed.

  The receiving member 7 is made of resin, and the receiving member 7 can be press-fitted and fixed in the supporting portion 3a by press-fitting the receiving member 7 into the supporting portion 3a from the opening 3b. For example, the diameter (outer diameter) D1 of the outer peripheral surface 7b of the receiving member 7 is substantially the same as the diameter (inner diameter) D2 of the inner peripheral surface 3e of the support portion 3a. Protrusions such as ribs are provided on the outer periphery so that the outer peripheral surface 7b and the projecting portions of the receiving member 7 are crimped to the inner peripheral surface 3e. In the embodiment, the outer diameter D1 of the receiving member 7 is set to be 0.2 mm smaller than the inner diameter D2 of the support portion 3a in consideration of the distortion of the diameter of the support portion 3a made of a metal pipe.

  The outer shape of the receiving member 7 may be any shape as long as it can be press-fitted and fixed in the support portion 3a. The receiving member 7 may be made of metal.

  The stopper portion 7a hits the end of the opening 3b of the support portion 3a and determines the press-fit fixing position of the receiving member 7.

  Inside the receiving member 7, a female screw 7c is engraved concentrically with the shaft core XX at a female screw hole forming portion 7j located at the lower portion B in the axial center XX direction. A female screw hole 7f having openings 7d and 7e on the side is formed.

  Further, in the receiving member 7, a fitting hole 7g is formed concentrically with the shaft core XX in a cylindrical shape in a fitting hole forming portion 7k located in the upper part A of the shaft core XX direction. Yes. The inner peripheral surface 7h of the fitting hole 7g is formed in a straight surface with no screw of the same diameter over the entire length in the axial direction. The inner diameter D3 of the fitting hole 7g is formed smaller than the inner diameter D4 of the female screw hole 7f. The upper side of the fitting hole 7g is opened by an opening 7i, the lower side is opened, and the opening 7d communicates with the female screw hole 7f.

In addition, the length of the female screw hole 7f and the fitting hole 7g in the XX direction is arbitrarily set.
A height adjusting member (adjuster) 9 for adjusting the height position of the fixture is fitted and disposed in the receiving member 7.

  When the height adjusting member 9 is arranged concentrically with the axis XX of the receiving member 7, a male threaded portion 9a located at the lower part B and a columnar fitting located at the upper part A It consists of a part 9b and a bowl-shaped rotation operation part 9d located at the lower part B of the male screw part 9a, and these are integrally formed of resin. The height adjusting member 9 may be made of metal.

  The length L1 of the male screw portion 9a in the axis XX direction is set to be approximately equal to the length L2 of the female screw hole 7f in the axis XX direction, and the axis XX direction of the fitting portion 9b. The length L3 is set to be longer than the length L4 in the axial direction of the fitting hole 7g.

  A male screw 9e is formed on the outer periphery of the male screw portion 9a, and the diameter of the male screw 9e is formed to be a diameter to be screwed into the female screw 7c.

  The outer peripheral surface 9m of the fitting portion 9b is formed on a non-threaded straight surface having the same diameter over the entire length in the axial direction. Further, the outer diameter D5 of the outer peripheral surface 9m of the fitting portion 9b is formed to be slightly smaller than the inner peripheral surface 7h of the fitting hole 7g, and is centered on the axis XX of the fitting portion 9b. The rotation is enabled and the inclination with respect to the axis XX is set to be suppressed. In other words, the outer peripheral surface 9m of the fitting portion 9b is rotatably arranged close to the inner peripheral surface 7h of the fitting hole 7g. In the embodiment, the outer peripheral surface 9m of the fitting portion 9b and the fitting hole The difference in diameter between 7 g of the inner peripheral surface 7 h was about 0.5 mm.

  The outer diameter of the rotation operation portion 9d is set larger than the outer diameter of the stopper portion 7a, that is, the outer diameter of the fitting portion 9b and the outer diameter of the male screw 9e, and a projection 9n is formed on the outer peripheral surface thereof. Has been.

  In the height adjusting member 9, a cylindrical connecting hole 9g centering on the axis XX is formed with its upper end closed and its lower end opened. Let the opening part of this lower end be 9h.

  The support shaft 6a of the wheel support member 6 is press-fitted and fixed to the connection hole 9g from the opening 9h, and the height adjusting member 9 and the support shaft 6a are connected so as not to rotate.

  A wheel support portion 6b is provided on the lower side of the support shaft 6a so as to be rotatable about an axis XX, and the wheel support portion 6b has a wheel 6c eccentric from the rotation center XX. It is provided so as to rotate about an axle 6d provided at a position, thereby constituting a caster. That is, the wheel 6c rotates on the axle 6d and revolves around the axis XX of the support shaft 6a.

  In the above configuration, when assembling, the support shaft 6a that is rotatably provided on the wheel support portion 6b is press-fitted into the connection hole 9g of the height adjustment member 9, and the height adjustment member 9 and the support shaft 6a are mutually connected. Stick. Further, the receiving member 7 is press-fitted into the support portion 3 a of the support leg 3 from below and fixed.

  Next, the height adjustment member 9 is inserted into the female screw hole 7f from the opening 7e of the receiving member 7 from the fitting portion 9b side, and the rotation operation portion 9d is manually rotated to change the male screw 9e to the female screw 7c. The male screw portion 9a is screwed into the female screw hole 7f. By this screwing, the fitting portion 9b is inserted into the fitting hole 7g. Thereby, as shown in FIGS. 1-3, each component is assembled | attached.

With the above configuration, the following operations and effects can be achieved in the first embodiment.
When the receiving member 7 is assembled into the support portion 3a of the support leg 3, the male screw portion 9a and the fitting portion 9b of the height adjusting member 9 can be supported with high accuracy in the receiving member 7 provided in the support leg 3. Further, it is not necessary to increase the processing accuracy of the inner peripheral surface 3e of the support leg 3, so that the manufacturing cost can be reduced and the assembling work is facilitated.

  Further, by forming the receiving member 7 from resin, even if the support leg 3 is formed of a metal pipe and the accuracy of the roundness varies, the receiving member 7 is press-fitted and fixed into the support portion 3a. Can be done easily.

  When the height of the table 1 is adjusted during use, the height adjusting member 9 is rotated forward and backward manually by the rotation operation portion 9d. By this forward / reverse rotation, the height adjusting member 9 is moved up and down by the male screw 9e and the female screw 7c, and when the height adjusting member 9 is raised most as shown in FIG. When the height adjusting member 9 is lowered as shown in FIG. 3 from the state, the height of the table 1 is increased. Therefore, the height of the table 1 can be adjusted by forward / reverse rotation of the rotation operation unit 9d.

  Further, since the support portion 3a of the support leg 3, that is, the axis XX of the height adjusting member 9 is eccentric with respect to the axle 6d of the wheel 6c, an eccentric load is applied to the height adjusting member 9. The load acts in a direction perpendicular to the axis XX.

  At this time, the height adjusting member 9 is formed by integrating the male screw portion 9a and the fitting portion 9b, and the outer peripheral surface 9m of the fitting portion 9b and the inner peripheral surface 7h of the fitting portion 7g in the receiving member 7 are formed. Due to the proximity, the load in the tilt direction due to the eccentric load is applied to both the contact between the male screw 9e and the female screw 7c, and the contact between the outer peripheral surface 9m of the fitting portion 9b and the inner peripheral surface 7h of the fitting hole 7g. Therefore, the frictional resistance against rotation having an eccentric load can be increased as compared with the case of supporting only by the female screw 7c.

  Therefore, in use, it is possible to suppress the height adjusting member 9 from being loosened and rotated by vibrations acting on the wheels 6c and the like, and to prevent the adjusted table 1 from changing in height.

  Furthermore, since the load is supported by both the male screw portion 9a and the fitting portion 9b against the eccentric load, the bearing strength is increased, the load resistance is increased, and the durability of the table is improved.

Moreover, since the outer diameter of the rotation operation part 9d which rotates the height adjustment member 9 was made larger than the outer diameter of the male screw part 9a and the fitting part 9b, in the male screw part 9a and the fitting part 9b as mentioned above, Even if it has friction resistance, the height adjustment operation by rotation of the height adjustment member 9 can be facilitated.
[Example 2]
In the first embodiment, the height adjusting member 9 is formed with the male screw portion 9a on the lower side and the fitting portion 9b on the upper side. However, depending on the type of the fixture, the load, the size of the caster, etc. The fitting portion 9b is formed on the lower side, the male screw portion 9a is formed on the upper side, and the outer diameter of the fitting portion 9b is larger than the outer diameter of the male screw portion 9a. The fitting hole 7g of the receiving member 7 may be formed on the lower side, and the female screw hole 7f may be formed on the upper side.

An example of this second embodiment is shown in FIG.
In FIG. 10A, the support portion 12 as a support leg portion is provided at a lower portion of the fixture by an attachment means (not shown) and is formed integrally with the fixture. The support portion 12 is formed by die casting, and has an upper space 12a therein, and a fitting hole 12b whose upper and lower ends are opened in a direction perpendicular to the upper space 12a. The inner peripheral surface 12c of the fitting hole 12b is formed on a non-threaded straight surface having the same diameter over the entire length in the axial direction XX.

  In the upper space 12a, a female screw member 13 is fixed on the upper side of the fitting hole 12b by appropriate fixing means such as press fitting, and the female screw hole 13b formed with the female screw 13a is formed on the shaft core X--. It is formed coaxially with X. The diameter of the female screw 13a is set smaller than the inner diameter of the fitting hole 12b.

FIG. 10B shows a height adjusting member (adjuster) 14 attached to the support portion 12.
The height adjusting member 14 has a male screw portion 14b formed with a male screw 14a screwed to the female screw 13a on the upper side, and a fitting portion 14c fitted to the fitting hole 12b on the lower side. These are integrally formed of resin. The diameter of the outer peripheral surface 14d of the fitting portion 14c is set to be close to the inner peripheral surface 12c of the fitting hole 12b, as in the first embodiment.

  The height adjusting member 14 is formed with a connection hole 14e similar to the connection hole 9g of the first embodiment. The support shaft 6a provided with the wheel 6c in the first embodiment is press-fitted and fixed in the connection hole 14e. A rotation operation portion 14f similar to the rotation operation portion 9d is provided at the lower end of the fitting portion 14c.

  Then, the height adjusting member 14 is inserted into the fitting hole 12b from the lower side of the support portion 12, and the male screw portion 14b of the height adjusting member 14 is screwed into the female screw hole 13b. As a result, the fitting portion 14c of the height adjusting member 14 is fitted into the fitting hole 12b with its outer peripheral surface close to the inner peripheral surface of the fitting hole 12b, and the male screw portion 14b is screwed into the female screw hole 13b. Match.

In the second embodiment, since the fitting hole 12b of the support portion 12 can be easily and accurately formed by cutting such as a drill, the same effect as in the first embodiment can be exhibited.
[Example 3]
The support portion 12 in the second embodiment may be formed separately from the fixture body.

Further, the female screw member 13 in the second embodiment may be formed integrally with the support portion 12, and the fitting hole 12b and the female screw hole 13b may be formed by cutting.
Further, the female screw hole 13b of Example 2 is formed on the lower side of the support portion 12, the female screw member 13 is used as a fitting portion forming member, and a fitting hole having a diameter larger than that of the female screw hole 13b is formed therein. The height adjusting member 14 may be formed so as to correspond to the above.
[Example 4]
In the first to third embodiments, the wheel support member 6 is a support member of a caster having an axle 6d that is eccentric from the support shaft 6a. However, the present invention is not limited to this caster, but the shaft of the support shaft 6a. You may apply to the thing of the structure which has the axle shaft 6d of the wheel 6c on the core XX line.

Other structures are the same as those in the above embodiment.
Also in the wheel in the fourth embodiment, the fitting portion 9b can suppress the loosening of the male screw 9e of the height adjusting member 9 due to the vibration of the wheel during use and the like, and the bearing strength is also increased. For example, the same effects as in the above embodiment can be exhibited.
[Example 5]
The above embodiment is the side where the present invention is applied to the support legs of the flap table, but the present invention is a height adjusting device attached to other office and household desks, chairs, wagons, furniture and other furniture. Can be applied to.
[Explanation of symbols]
1 Furniture (table)
3, 4 Support leg 3a Support portion 6 Wheel support member 6c Wheel 6d Axle 7 Receiving member 7f Female screw hole 7g Fitting holes 9, 14 Height adjusting member 9a Male screw portion 9b Fitting portion

Claims (6)

  In the lower part of the fixture, a female screw hole is provided on one of the upper side and the lower side in use, and a fitting hole is provided on the other, and these are coaxially connected to each other, and the male screw part and the fitting part are integrated on the same axis. The formed height adjustment member is provided with a male screw portion screwed into the female screw hole, a fitting portion fitted into the fitting hole, and a wheel provided at a lower portion of the height adjustment member. A height adjustment device for furniture.   2. The fixture height adjusting device according to claim 1, wherein at least one of the female screw hole and the fitting hole is formed as a separate member from the fixture support portion.   A receiving member is fixed in a support part provided in the lower part of the fixture so that its axial direction is vertical when in use, and either the upper side or the lower side in the axial direction of the receiving member is placed in the receiving member. 3. The height adjusting device for a fixture according to claim 2, wherein a female screw hole is provided on one side, a fitting hole is provided on the other side, and the female screw hole and the fitting hole are coaxially communicated with each other.   4. The height adjusting device for a fixture according to claim 1, wherein the wheel is a caster that revolves around an axle that is eccentric to the axle of the wheel. 5.   5. The rotation operation portion having a larger diameter than the outer diameter of the fitting portion and the outer diameter of the male screw portion is provided at a lower portion of the height adjusting member. Fixture height adjustment device.   The height adjusting device for a fixture according to any one of claims 3 to 5, wherein the receiving member is made of resin.

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