JPH0332265Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention allows a support frame for supporting a drawing machine, a medical machine, etc. to be placed in any position between approximately horizontal to the floor and approximately perpendicular to the floor. The present invention relates to a balance device in which the support frame is biased in a balance direction by the elasticity of a bending bar in a support table which can be tilted at an angle or the support frame can be raised and lowered.

[Conventional technology]

A conventional balancing device using a bending bar is disclosed in Japanese Utility Model Application Publication No. 125132/1983. As is clear from the publication, the balancing force on the support frame is applied by a single bending bar.
The balance force is adjusted by displacing the bending bar in the direction of deflection.

[Problem that the invention attempts to solve]

Although the above device is suitable for adjusting the balance force within a small range, there is a limit to the amount of deflection of a single bending bar, so it is not possible to adjust the balance force over a large range. However, when the machines installed on the support frame are changed and the weights of the machines differ greatly, it is necessary to adjust the above-mentioned balance force over a wide range.

Therefore, an object of the present invention is to provide a balancing device that allows the above-mentioned balance force to be easily adjusted over a wide range.

[Means to solve problems]

In order to achieve the above object, the present invention provides a bar holder 4 between the substrates 6 and 8 fixed to the pair of legs 2 and 4.
0 and 42, a plurality of bending bars 46 are supported on the bar holders 40 and 42 so as to be slidable in the longitudinal direction thereof, and swinging rods 14 and 16 are rotatably supported on the base plates 6 and 8. , the swinging rod 1
The vicinity of the end of the bending bar 46 is engaged with the displacement portions of the bending bars 4 and 16, and the swinging bars 14 and 16 are rotated in a direction opposite to the rotation direction of the swinging bars 14 and 16 due to the weight applied to the swinging bars 14 and 16. In the device in which the elasticity of the bending bar 46 acts on the bending bars 14 and 16, at least one end surface of the bending bar 46 is made to face at least one of the substrates 6 and 8; A hole 48 is provided in the substrate 6 at a position facing one end surface of the bending bar 46 when the bending bar 46 is not bent.

[Effect]

In the above configuration, when the swinging rods 14 and 16 are swung in the upward direction until the bending bars 46 are no longer bent, the bending bars 4
The end surface of 6 faces the hole 48 of the substrate 6. In this state, the operator operates the plurality of bending bars 4.
A desired number of bending bars 46 from among 6
By pulling out the bending bar 46, the balance force of the bending bar 46 can be easily adjusted over a wide range.

〔Example〕

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

Numerals 2 and 4 are legs, and substrates 6 and 8 are welded and fixed to the upper inner surfaces of these legs. Covers 10 and 12 are removably screwed to the upper outer surfaces of the legs 2 and 4. Reference numeral 22 designates a tubular horizontal rod, and plate nuts 24 are fixed to both ends of the rod, and the base plate 6,
A bolt 18 fitted into the hole 8 is screwed together, and the spacer 20 fitted into the bolt 18 is fixed under pressure between the substrates 6, 8 and the plate nut 24 by the tightening force of the bolt 18. There is. Reference numerals 14 and 16 are plate-shaped swinging rods, and holes provided in the vicinity of their base ends are rotatably fitted into the outer circumferential surface of the spacer 20. A long hole 26 is provided in the base end portion of the swinging rods 14 and 16. 28 and 30 are horizontal rods 22
These are elastic adjustment plates fixed by welding to
A bolt 34 is slidably inserted into a hole formed through the substrates 6, 8. Nuts 36' and 38' are screwed into the bolt 34, and spacers 36 and 38 are fitted into the threaded portion of the bolt 34. 40,42
are plate-shaped bar holders, which are fixed to the horizontal rod 22. The holders 40, 42
An elongated hole 44 is transparently provided in the eccentric portion, and three bending bars (elastic rods) 46 are inserted into the elongated hole 44. Near both ends of the bending bar 46 are fitted into the long holes 26 at the proximal ends of the swinging rods 14, 16, and both end surfaces of the bending bar 46 are close to and opposite the inner surfaces of the substrates 6, 8. There is. A hole 48 for inserting and removing the bar is transparently provided in the substrate 6. The hole 48 is set to match one portion of the elongated hole 26 when the swinging rod 14 is swung in the upward direction until the bending bar 46 is no longer bent. the swinging rod 14;
Tubular reinforcing rods 50, 5 are installed at the middle and tip of 16.
Brackets 54 and 56 are rotatably supported near both ends of the reinforcing rod 52 via a brake mechanism, and a top plate support frame 58 is fixed to the brackets 54 and 56. A top plate 59 is fixed to the top plate support frame 58. Reference numeral 60 denotes a link, one end of which is rotatably fitted to the reinforcing rod 52 via a brake mechanism, and the other end of the link 60 is rotatably fitted to one end of the link 62 rotatably supported by the base plate 6. It is pivoted for rotation. 64 and 66 are angle fixed arms, one end of which is connected to the swinging rod 1.
The arms 64 and 66 are rotatably pivoted at intermediate portions of the arms 64 and 16, and the other elongated holes of the arms 64 and 66 slide into a threaded rod 70 with a handle that is screwed into a nut 68 fixed to the legs 2 and 4. They fit together freely.

Next, the operation of this embodiment will be explained. When the swinging rods 14 and 16 release the braking force on the reinforcing rod 52 of the link 60 and release the fixation of the arms 64 and 66 from the legs 2 and 4,
It is swingable about the spacer 20 in a plane perpendicular to the floor surface, and the top plate support frame 58 is raised and lowered by the swinging of the swinging rods 14 and 16. Top plate 5
When a medical machine or a drawing machine is installed in 9, the swinging rods 14 and 16 are provided with spacers 2 in the falling direction.
A rotational moment about 0 is created. The bolt 34 is placed in advance in the middle of the elongated hole 32 of the adjusting plate 28, and rotated in the tightening direction to tighten the elastic adjusting plate 2.
8 and 30 are fixed to the substrates 6 and 8. Thereby, the horizontal rod 22 is fixed to the base plates 6, 8 via the elasticity adjustment plates 28, 30. When the swinging rods 14 and 16 rotate in the falling direction about the spacer 20, the bending bar 46 that engages with the elongated hole 44 at the base end of the swinging rods 14 and 16 bends, and the swinging rods 14 and 16 are bent. 1
6, a rotational moment acts in the opposite direction to the rotational moment in the falling direction. As a result, the swinging rods 14 and 16 are balanced by the spring force of the bending bar 46 without rapidly rotating in the falling direction. When replacing the machine mounted on the top plate 59 with a lighter one and wishing to increase the balance force on the swinging rods 14 and 16, move the swinging rod 1 until the bending bar 46 no longer bends.
4 and 16 are raised, and in the raised position, the handles 72 and 76 of the screw rod 70 are rotated in the tightening direction to fix the swing rods 14 and 16. In this state, one portion of the elongated hole 26 at the base end of the swinging rod 14 matches the hole 48 in the base plate 6 as shown in FIG. 3B. Next, the cover 10 is removed and one bending bar 46 is pulled out from the hole 48 of the board 6. At this time, the bending bar 46 does not bend and there is no frictional force between the bending bar 46 and the wall surface of the elongated hole 26 of the swinging rods 14, 16, so the bending bar 46 can be moved smoothly onto the substrate 6. It can be pulled out through the hole 48. After pulling out one bending bar 46 from the holders 40 and 42, a short rod-like member with the same diameter is inserted into the other part of the long hole 44 of the holders 40 and 42, and the other two bending bars are pulled out. One of the holes 46 is positioned in one part of the elongated hole 44. This also allows one bending bar 46 to be pulled out from the hole 48. Note that the hole 48 is connected to the substrate 8.
It may be provided on the side. For fine adjustment of the balance force, loosen the bolt 34, swing the elastic adjustment plate 28, adjust the rotation of the horizontal rod 22, and then tighten and fix the bolt 34 at the desired rotation angle to fix the horizontal rod 22. This can be done by: When adding a bending bar, return the adjusting plate 28 to a predetermined angle, pull out the bar-shaped member from the holders 40 and 42, and align one part of the long hole 26 of the swinging rod 14 with the hole 48. From the hole 48, the long hole 26 of the swinging rod 14 and the long hole 44 of the holders 40, 42 are connected.
Then, a bending bar is inserted into the long hole of the swinging rod 16. Alternatively, the support frame 58 may be directly attached to the swinging rods 14, 16, and the swinging of the swinging rods 14, 16 may cause the support frame 58 to be inclined at a desired angle with respect to the base surface.

〔effect〕

As described above, the present invention has the advantage that the bending bars can be pulled out in a state where the bending bars are not bent, so that the balance force can be easily adjusted over a wide range.

[Brief explanation of drawings]

FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is an explanatory view. 2, 4... Leg body, 6, 8... Board, 10, 12
... Cover, 14, 16 ... Swinging rod, 18 ... Bolt, 20 ... Spacer, 22 ... Horizontal rod, 24
...Plate nut, 28,30...Elasticity adjustment plate, 4
0,42...bar holder, 46...bending bar, 48...hole.

Claims (1)

[Scope of utility model registration request] Bar holders 40 and 42 are provided between the substrates 6 and 8 fixed to the pair of legs 2 and 4, and the bar holders 4
0 and 42 support a plurality of bending bars 46 so as to be slidable in the longitudinal direction, while swinging rods 14 and 16 are rotatably supported on the substrates 6 and 8. The vicinity of the end of the bending bar 46 is engaged with the displacement portion, and the swinging rods 14, 1 are caused by the weight applied to the swinging rods 14, 16.
In the apparatus in which the elasticity of the bending bar 46 acts on the swinging rods 14 and 16 in a direction opposite to the direction of rotation of the bending bar 46.
At least one end surface of the bending bar 46 is made to face at least one of the substrates 6 and 8, and when the bending bar 46 is no longer bent, the bending bar 46 is placed at a position facing the one end surface of the bending bar 46. A balancing device for a support stand, characterized in that a hole 48 is provided in a substrate 6.