JPS6238573B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a spring balancer used for the purpose of reducing the operating force when opening and closing a rotated member such as an opening/closing lid. The present invention relates to a spring balancer that includes an adjustment mechanism and a load adjustment mechanism that corresponds to the weight of a rotated member.

In general, the spring balancer 1 has a length adjustment mechanism to accommodate variations in the mounting position and a load adjustment mechanism to accommodate variations in the weight of the rotated member, as shown in FIGS. 1 and 2. It is desirable to have However, the length adjustment mechanism of the conventional spring balancer 1
As shown in the figure, a piece 5 screwed onto the attachment part 2 to the main body etc. is fixed to one end of the outer cylinder 4, and a piece 6 is fixed to the other end.
A rod 3 that is slidably inserted through the rod 3 is attached, and the end of a coil spring 7 is fixed to the tip of the rod 3 in the outer cylinder 4 via a slider 8, and the rod tip and the mounting portion 2 It has a structure in which a coil spring 9 is inserted between the side pieces 5. Therefore, if the attachment part 2 to the main body provided at one end of the spring balancer 1 is formed in a screw type, and the length of the attachment position is adjusted by screwing in the attachment part 2, it will not be possible to cover the opening/closing lid or the like. It is not possible to adjust the load with respect to the weight of the rotating member.

In addition, some spring balancers 1 have a screw-type mounting section 2 that expands and contracts the coil springs 7 and 9 in synchronization with the length adjustment. It was not practical because it had problems such as the load changing regardless of the characteristics. These problems often occur when an openable device such as a video projector is made of a wooden cabinet. In other words, since the cabinet is made of wood, dimensional accuracy is low, and variations in weight also depend on the quality of the wood.

The present invention was made based on the above-mentioned circumstances, and provides a spring balancer that is capable of independently adjusting the installation length of the spring balancer and the load adjustment for obtaining balanced characteristics. It is something to do.

Hereinafter, embodiments of the present invention will be described in detail based on FIG. 4. In the drawings, parts and parts corresponding to those of the conventional example will be described with the same reference numerals.
FIG. 4 shows an embodiment of the present invention which is a modification of the conventional example shown in FIG. 3, in which a receiving seat 10 is provided at the end of the coil spring 7 within the outer cylinder 4. In addition, the outer cylinder 4
At least two or more screw holes 6a are bored through the outer cylinder 4 in the piece 6 fixed to the end thereof, and a push screw 11 is screwed into the screw holes 6a. The seat 10 has a hole 1 through which the rod 3 is inserted.
This hole 10a is formed in a size such that a sleeve-shaped stopper 12 fixed to the tip of the rod 3 and which limits the stroke can be freely inserted into the hole 10a.
The stroke of the rod 3 is not affected at all, and furthermore, the movement of the catch seat 10 provided between the coil spring 7 and the piece 6 is unrelated to the stroke of the rod 3.
Note that 16 is a locking screw.

In the figure, 13 is a silencer provided in the outer cylinder 4, and 14 is a spring pin that fixes the tip of the rod 3 to the slider 8 having a stopper 12 to which the coil springs 7, 9, etc. are fixed.
Numeral 5 is a lock nut on the mounting part 2 of the spring balancer 1, which locks the mounting part 2 from rotating after adjusting the length between the mounting hole 2a of the mounting part 2 and the mounting hole 3a of the rod 3. be.

Next, the operation of the spring balancer configured as described above will be explained. First, when adjusting the length of the spring balancer 1, loosen the lock nut 15 of the mounting part 2, and then
The length is adjusted by rotating the coil spring 7, and at this time, the adjustment can be made completely independently of the load characteristics of the coil springs 7 and 9.

On the other hand, push the push screw 11 screwed into the piece 6 on the rod 3 side of the spring balancer 1,
By retracting them, it is possible to change the load characteristics of the coil springs 7 and 9. At this time, the length of spring balancer 1,
That is, the distance between the mounting hole 2a of the mounting portion 2 and the mounting hole 3a of the rod 3 can be adjusted completely independently.

Note that the mechanism for adjusting the load characteristics of the spring balancer 1 may be provided at both ends of the spring balancer 1, and can be set appropriately depending on the amount of adjustment.

As described in detail above, the spring balancer according to the present invention has a simple structure and can be easily modified into a conventional spring balancer. Further, in the above configuration, since the mounting dimensions, load characteristics, stroke, etc. can be adjusted independently, the best operational feeling of the rotated member can be obtained.

Furthermore, it is possible to obtain a spring balancer that has the effect of absorbing variations in size, shape, and weight of the main body to which the spring balancer is attached, the opening/closing lid, etc., and adjusting the spring balancer to the best condition.

[Brief explanation of the drawing]

1 and 2 are perspective views showing how the spring balancer is mounted on a rotating member such as an opening/closing lid, FIG. 3 is a vertical sectional view of the spring balancer showing a conventional embodiment, and FIG. 4 5 is a longitudinal sectional view of a spring balancer showing one embodiment of the present invention, and FIG. 5 is a view taken along the Z arrow in FIG. 4. 1...Spring balancer, 2...Mounting part,
3... Rod, 4... Outer tube, 5, 6... Piece, 7...
...Coil spring, 9...Coil spring, 10...Socket, 11...Push screw, 16...Lock screw.

Claims (1)

[Claims] 1. A spring in which a coil spring is housed in an outer cylinder that is suspended between a main body and a rotated member that rotates with respect to the main body via a rod that slides inside the outer cylinder and expands and contracts. In the balancer, the coil spring is inserted between each of the two pieces fixed to both ends of the outer cylinder and the end of the rod inside the outer cylinder, and the coil spring is inserted between at least one of the two pieces. A push screw provided to protrude and retract in the axial direction of the outer cylinder, and a receiving seat interposed between the piece and the end of the coil spring and moved by the push screw to adjust the torque of the coil spring. A spring balancer characterized by being provided with a load adjustment mechanism consisting of. 2. In a spring balancer in which a coil spring is housed in an outer cylinder that is suspended between a main body and a rotated member that rotates with respect to the main body via a rod that slides inside the outer cylinder and expands and contracts, the above-mentioned outer cylinder The coil spring is inserted between each of the two pieces fixed to both ends of the rod and the end of the rod inside the outer cylinder, and the coil spring is inserted into at least one of the two pieces in the axial direction of the outer cylinder. A load adjustment mechanism consisting of a push screw provided so as to appear and retract, and a receiving seat interposed between the piece and the end of the coil spring and moved by the push screw to adjust the torque of the coil spring. and a mounting member for the main body or the rotated member, which is screwed into a piece fixed to the end of the outer cylinder on the opposite side to the entrance/exit side of the rod of the two pieces, so as to be able to move forward and backward in the axial direction. A spring balancer characterized by having a mechanism.