JPS6111081B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lifting platform used for desks, chairs, drafting tables, etc.

When manufacturing a lifting platform in which a sliding device consisting of a rail and a steel ball is arranged in the gap between the leg members and the lifting leg members, the dimensions of the leg members and the leg members that can be raised and lowered relative to them must be adjusted with high precision. If this setting is not made, the rail provided on the leg member side and the rail provided on the elevating member side will not be in close contact with each other through the steel balls placed between the rails, and play will occur between the leg member and the elevating member. It will happen. Therefore, in the present invention, one rail is fixed to a displacement member that is displaced toward and away from the other rail, and the distance between one rail and the other rail can be adjusted by the displacement action of the displacement member. The main purpose of this invention is to eliminate the above defects by providing a lateral vibration prevention member and a holding member to prevent the displacement member from lateral vibration and movement in the longitudinal direction.

Another object of the present invention is to form the displacement member lateral vibration prevention member and the holding member by a single elastic plate member, and to fix both sides of the plate member to the leg members. The purpose is to set the members to high strength.

Yet another object of the invention is to enable displacement adjustment of the displacement member to be performed at any desired location on the displacement member.

Furthermore, another object of the present invention is to form a reinforcing space having a substantially triangular cross section in a mechanism for fixing the lateral vibration prevention member to a support member provided on a leg member, thereby firmly fixing the lateral vibration prevention member to the leg member side. It is to be.

The configuration of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 1 denotes a horizontal leg member of a drafting table, on which is erected a hollow upright external leg member 2 having a substantially rectangular cross section and made of aluminum, iron, or other similar materials. As shown in FIG. 2, the external leg member 2 is integrally formed with side plate parts 3, 4, 5, a support member 6, reinforcing parts 7, 8, a lateral vibration prevention member 9, and a displacement member 10. The reinforcing parts 7 and 8 are the side plate parts 3,
4 and 5, a reinforcing space 11 having a triangular cross section,
12 is formed over the entire length of the external leg member 2. Reference numeral 13 denotes a holding frame portion formed along the longitudinal direction on the inner surface of the side plate portion 5, and a pair of rail members 14 and 15 are fixedly arranged on the frame portion 13 so as to be parallel to each other. The lateral vibration prevention member 9 and the displacement member 10 have substantially intermediate portions as shown in FIG.
It is composed of a single plate member 20 having elasticity so as to be able to be displaced in the left and right direction. A holding frame portion 16 is formed approximately in the middle of the plate member, and a pair of rail members 17 and 18 are provided on the holding frame portion 16.
They are fixedly arranged parallel to each other over the entire length of the external leg members 2. The support member 6 is formed with an inclined portion, and the leg member 2 is formed between the side plate portions 3 and 4 and the members 6 and 20 due to the inclined portion.
Reinforcement spaces 21 and 22 are formed with substantially triangular cross sections over the entire length in the longitudinal direction. 23, 24
is an adjustment member made of screws that are screwed into screw holes 25 and 26 provided at appropriate positions in the middle part of the support member 6, and the tip thereof is connected to a thin thread stretched in the middle part of the support member 20. It is in contact with the surface of the iron plate. 27
is a fixing member consisting of a fixing screw inserted through a washer into a hole 28 provided in a suitable position in the middle of the support member 6, and the threaded portion penetrates through the iron plate and the member 20. It is screwed into the formed screw hole 29. Reference numeral 30 designates a hollow lifting leg member having a substantially rectangular cross section, and a holding frame portion is integrally formed over substantially the entire length between both sides of the leg member, and the holding frame portion includes the following:
A pair of rail members 31, 32 and 33, 34 are fixedly arranged. 35 is the rail member 17,
18 and 31, 32, and the rail member 14,
A plurality of steel balls are arranged between 15 and 33, 34, and a retainer (not shown) is provided between the steel balls.
are maintained at a predetermined distance from each other. 36
is a gas spring which is a rod-shaped elastic elastic means, the lower end of which is fitted and placed in the fitting recess formed in the horizontal foot member 1, and the upper end of which is fitted into the fitting recess formed in the horizontal leg member 1. It is in elastic contact with the center lower surface of the upper end cover member. 37 is a drawing board support member attached to the upper part of the internal leg member 30, to which the drawing board 3 is attached.
8 is fixed. 39 is a cover.

Next, the operation of this embodiment will be explained.

First, the adjusting members 23, 24 and the fixing member 27 are loosened, and the elasticity of the plate member 20 allows the approximately middle portion thereof to be displaced in the left-right direction in FIG. Next, the elevating inner leg member 30 is loosely fitted into the upright outer leg member 2, and the upper end of the gas spring 36 is brought into elastic contact with the lower surface of the lid member of the elevating leg member 30, and the rail members 17, 18 and 31, 32
35 groups of steel balls are arranged between the rail members 14, 15 and 33, 34. Next, the screw 23,
24 (adjusting member) in the tightening direction, and
0 to the left in FIG. 2 to displace the member 20 to the left. Due to the leftward displacement of the member 20, the rail members 17, 18, 31, 32, 14, 15, and 33, 34 are crimped to the steel ball 35,
The rail member and the steel ball are tightly fitted with no play therebetween. Next, by rotating the screw, that is, the fixing member 27 in the tightening direction, and tightly screwing the threaded portion into the screw hole 29 of the member 20, the member 20 is firmly supported by the support member 6. The adjustment member 23,
A plurality of adjustment members 24 are provided at appropriate positions on the support member 6, and each adjustment member is adjusted in the manner described above. Finally, the drawing board support member 37 is attached to the elevating leg member 30.
Install. In the above configuration, when the fixing device (not shown) is released and the drawing plate 38 is held in the hand and pressure is applied in the vertical direction, the elevating leg member 30 is attached to the rail members 17, 18 and 4, 15 and the steel ball 35. It moves up and down smoothly while being guided. Once the drawing board 38 is set at a desired height position, a fixing device (not shown) is engaged to fix the elevating leg member 30 to the upright leg member 2. The plate member 20 includes rail members 17,1
8 to the rail members 31 and 32 so as to be displaceable in the direction toward and away from the rail members 31 and 32, and a holding member 4 that holds the displacement member 10 on the leg member 2 side.
It also has the function of 0.

Next, another embodiment will be described with reference to FIG.

Reference numerals 41 and 42 designate side vibration prevention members fixed along the longitudinal direction of the upright external leg member 2, and a displacement member 43 is attached to the linear guide portion of this member so as to be able to slide in the left and right directions in FIG. are arranged in a mating manner. 44 is a fixing screw, which also functions as a holding member 44 that prevents the displacement member 43 from moving in the vertical direction. In the above configuration, the adjustment members 23, 2
4 and adjust the amount of protrusion from the support member 6, the opposing distance between the support member 6 and the displacement member 43 can be changed. 35 can be tightly fitted. In this state, if the fixing screw 44 is tightly screwed into the screw hole 29, the displacement member 43 will be fixed to the support member 6.

Next, another embodiment will be described with reference to FIG.

Reference numeral 46 denotes a sliding support member that slidably contacts guides 47 and 48 that are oriented along substantially the entire length of the upright leg member 2 in the longitudinal direction. On the other hand, the dimensions are set to be extremely short. A T-slot 4 is provided in the longitudinal direction of the plate member 20.
A plate nut 50 is disposed in the groove 49, and a fixing screw 51 is screwed into the plate nut 50. 52 is an adjustment screw. In the above configuration, the sliding support member 46 is connected to the guides 47 and 48.
along to the desired adjustment position, and at that position,
The positions of the rail members 17 and 18 are adjusted by operating the adjusting screw 52 in the manner described above. Further, the plate nut 50 and the cap screw 51 are used to fix the member 20 and the member 46.
In addition, when implementing the present invention, the external leg member 2 is
It may be configured to be moved to the internal leg member 30, or an adjustment device consisting of the displacement member 10, etc. may be provided on the elevating leg member 30 side.

In the present invention, as described above, since the rail member is supported on the leg member side by the lateral vibration prevention member, lateral vibration of the rail member can be prevented.
In addition to being able to set the straightness with high precision, the rail member can be connected to the displacement member and set in an interlocking state, and the facing interval between the rail member and the opposing rail member can be set to the optimal state. Therefore, the sliding device consisting of the rail and the ball can be set in a tightly fitted state without play. Therefore, the elevating leg member does not require high precision in the dimensions and mounting accuracy of the leg members, rails, etc., and the elevating leg member can smoothly move up and down relative to the leg member.

In addition, since the lateral swing member, the displacement member, and the holding member that holds them are integrally formed from a single elastic plate member, and both ends of this are fixed to the leg members, the above-mentioned The strength of the plate member against the load in the planar direction can be set firmly, and lateral vibration of the rail member can be effectively prevented.

Furthermore, since the support member facing the displacement member can be moved to any position along the longitudinal direction of the leg member, the distance between the rail member and the opposing rail member at a desired position can be adjusted. It can be performed.

Furthermore, since a triangular space having a substantially triangular cross section is formed in the fixing mechanism between the support member and the lateral shake prevention member, the strength when fixing the lateral shake prevention member and the support member can be set to be strong. exists.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the present invention; FIG. 1 is an overall front view, FIG. 2 is a cross-sectional view of essential parts, FIG. 3 is a cross-sectional view of another embodiment, and FIG. 4 is a cross-sectional view of another embodiment. A sectional view showing an example, FIG. 5 is a sectional view of the same fixing device. 1...Horizontal leg member, 2...External leg member, 6...
Support member, 9... Lateral vibration prevention member, 10... Displacement member, 11, 12... Reinforcement space portion, 14, 15...
...Rail member, 17, 18...Rail member, 20
... Member, 21, 22 ... Reinforcement space, 23, 2
4... Adjustment member, 25, 26... Screw hole, 27...
...fixing member, 28...hole, 29...screw hole, 30
...Lifting leg member, 31, 32, 33, 34...Rail member, 35...Steel ball, 36...Gas spring, 37...Drawing board support member, 38...Drawing board, 39
... Cover, 40 ... Holding member, 41, 42 ...
Lateral vibration prevention member, 43...Displacement member, 44...Fixing screw (holding member), 46...Sliding support member, 5
1...fixing screw, 52...adjusting screw.

Claims (1)

[Scope of Claims] 1. A hollow external leg member 2, an internal leg member 30 loosely fitted therein, and the pair of leg members 2, 30.
A pair of mutually parallel rail members 31 provided along the longitudinal direction on one side of the
32, side shake prevention members 9, 41, 42 provided on the other side of the pair of leg members 2, 30 along the longitudinal direction thereof, and the side shake prevention members 9, 4.
1, 42, a displacement member 10, 43 which is restricted to be able to freely move only in a direction toward and away from the pair of rail members 31, 32; holding members 40, 44 for holding the displacement members 10, 4 on the other side of the displacement members 10, 4;
A pair of mutually parallel rail members 1 fixed to 3
7, 18, a ball consisting of a plurality of steel balls 35, etc. disposed between the pair of rail members 17, 18 and the pair of rail members 31, 32, and the displacement members 10, 43. a leg member 2, a support member 6, 46 disposed opposite the displacement member 10, 43, and a support member 6, 46 for displacing the displacement member 10, 43, which is attached to a suitable position on the support member 6, 46. An elevating platform comprising adjusting members 23, 24, and 52, and characterized in that one 30 of the pair of leg members 2, 30 is configured to be able to rise and fall freely relative to the other 2. 2. The lateral shake prevention member 9, the displacement member 10, and the holding member 40 are integrally formed by a single elastic plate member 20, and both ends of the plate member 20 are fixed to the leg member 2 side. The lifting platform according to item 1, characterized in that: 3. The width of the support member 46 in the height direction is set short, and the support member 46 is configured to be slidable along the longitudinal direction of the leg member 2.
6, the adjusting member 52
2. The elevating platform according to claim 1, wherein the elevating platform is configured such that the displacing member 10 can be positioned at an appropriate position. 4. A hollow external leg member 2, an internal leg member 30 loosely fitted therein, and the pair of leg members 2, 30.
A pair of mutually parallel rail members 31 provided along the longitudinal direction on one side of the
32, side shake prevention members 9, 41, 42 provided on the other side of the pair of leg members 2, 30 along the longitudinal direction thereof, and the side shake prevention members 9, 4.
1, 42, a displacement member 10, 43 which is restricted to be able to freely move only in a direction toward and away from the pair of rail members 31, 32; holding members 40, 44 for holding the displacement members 10, 4 on the other side;
A pair of mutually parallel rail members 1 fixedly attached to 3
7, 18, a ball consisting of a plurality of steel balls 35, etc. disposed between the pair of rail members 17, 18 and the pair of rail members 31, 32, and the displacement members 10, 43. supporting members 6, 46 disposed on the leg member 2 facing the displacing members 10, 43, and displacing the displacing members 10, 43 attached to appropriate positions of the supporting members 6, 46; adjustment members 23, 24, 52, one 30 of the pair of leg members 2, 30 is configured to be movable up and down relative to the other 2, and the support members 6, 46,
Fixing members 27 and 51 for fixing the displacement members 10 and 43 are provided thereon, and an inclined portion is provided on the support members 6 and 46, and the support members 6 and 4
6 and the lateral vibration prevention members 9, 41, 42, reinforcing spaces 21, 22 having a triangular cross section are formed.