JPH0244183Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a suspension device that lifts the beam when the balance is at rest, thereby relieving the load on each blade.

Due to the structure of a constant-sensitivity balance, a certain amount of load is always applied to each fulcrum blade, but if left in this condition, each fulcrum blade will wear out due to the load, resulting in a loss of precision. Conventionally, when the balance is at rest, the beam is lifted to relieve the load on each fulcrum blade. As shown in FIGS. 1 and 2, the conventional suspension device has an end blade support rod 4 disposed on a lever 6 that rotates in an arc in the direction of the arrow. The load on the end blade 9 is released by lifting the end blade receiver 2 on which the countersunk 3 supporting the end blade 11 is placed. Then, with the end blade holder 2 lifted up by the end blade holder support rod 4, the lever 6 and the lever 7 are further rotated in an arc, and the front support rod 5 and the rear support rod 8 arranged on both levers 6 and 7 are moved. By this, the beam 1 is lifted, the load on the middle blade 10 is released, and the beam 1 is brought to rest. The conventional suspension device has such a mechanism, and the balance in the suspension state is activated by the reverse operation described above. Therefore, in such a mechanism, even after the end blade support rod 4 disposed on the lever 6 lifts the end blade holder 2 and relieves the load on the end blade 9, it continues to move as the lever 6 rotates in an arc. However, since the end blade support rod 4 has a position with a larger radius than the center of the arc rotation of the lever 6, it moves over a larger distance while making an arc movement. Of course, extreme caution is required when operating such a balance, but when operating a balance in a resting state, the large arc movement of the end blade holder support rod mentioned above, that is, the circular arc movement of the end blade holder, can cause the balance to become suspended. It was unavoidable that the hangings would sway. The capacity scale fluctuates due to the shaking of the counter, making it difficult to read the stationary point, making it time-consuming and time-consuming to adjust the swing of the counter to a small level, and requiring skill. For this reason, when an inexperienced person uses a balance, it becomes difficult to make quick and accurate measurements.

In view of the above-mentioned drawbacks, this invention prevents the balance from shaking when operating the balance in a resting state.
The purpose is to provide a balance stopping device that can speed up the reading of the stationary point and the weighing capacity. A fixed support rod that supports the beam on the far side is placed on the fixed part of the balance, and a movable support rod that supports the beam at the rear of the middle blade can be moved in the vertical direction. Each support rod is arranged so that the end blade descends and leaves the end blade holder by circular rotation of the beam about the fixed support rod, and then the middle blade leaves the middle blade holder by circular rotation of the beam with the fixed support rod as the fulcrum. This relates to a balance pause device that selects the relative position of the balance.

Next, an embodiment of the balance stopping device according to this invention will be described based on the drawings. FIG. 3 is a side view of the balance stopping device according to this invention, and FIG. 4 is a front view of FIG. 3. In the figure, the end blade holder support rod 41 that holds the end blade holder 2 and the fixed support rod 51 that holds the far side of the beam are both fixed to a fixed part of the balance, and the movable support rod 81 is arranged to move in the vertical direction. to be established. When the balance is to be put to rest, the movable support rod 81 is moved upward in the vertical direction to lift the beam 1. Along with this, the beam 1 initially rotates in an arc around the middle blade 10 by a lever action. At this time, the end blade support rod 41
and by appropriately selecting the position of the fixed support rod 51,
The end blade receiver 2 placed on the end blade 9 at the end of the beam 1 descends and contacts the end blade support rod 41, and after being supported by this, the beam 1 itself contacts the fixed support rod 51. , so that it is supported as a fulcrum. When the beam 1 is supported by the fixed support rod 51, the movement of the beam 1 due to the upward movement of the movable support rod 81 becomes a circular arc rotation with the point of contact with the fixed support rod 51 as a fulcrum, and the middle blade 10 Leave from 12. Through the above-described operations, the load on the end blade 9 and the middle blade 10 is released, and the balance is placed in a resting state. In this way, the circular arc rotation around the middle blade 10 of the beam 1 to eliminate the load on the end blade 9, that is, to support the end blade receiver 2 by the end blade support rod 41, is almost the same as the movement range when the balance is in operation. The same is true, and the subsequent larger movement of the beam 1 to relieve the load on the middle blade 10 is performed without moving the end blade holder 2 (in the state supported by the end blade support rod 41). (maintained), the shaking of the balance 11 can be almost eliminated even when the balance is reversed to operate the balance in a resting state.

As is clear from the above description, the balance suspension device according to this invention eliminates the deviation of the beam 1 in the lateral and front-back directions by vertically moving only one point of the movable support rod 81 when moving toward the beam 1. By keeping the end blade holder 2 in a stationary state until just before the balance is activated and by minimizing the vertical movement of the end blade holder 2, the shaking of the holder 11 that accompanies the operating operation is eliminated, and such a mechanism is adopted. This eliminates the wobbling of the weighing scale and allows the stationary point to be easily determined, thus making it possible to operate the balance easily and quickly. Further, in the above-described embodiment, the movable support rod 81 is moved up and down in the vertical direction, but the movement may be in an arcuate direction.

Since the balance suspension device according to this invention has the above-mentioned configuration, it is possible to eliminate the fluctuation of the capacity scale due to the fluctuation of the beam or beam that tends to occur when operating a balance in the suspension state, and therefore, it is possible to eliminate the fluctuation of the capacity scale due to the shaking of the beam and The present invention provides a balance pause device that allows the balance to be easily found and weighs quickly and precisely.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional balance stopping device, and FIG. 2 is a front view of FIG. 1. Third
This figure is a side view of the balance stopping device according to this invention, and FIG. 4 shows a front view of FIG. 3. 1...Beam, 2...End blade holder, 3...Front suspension, 9...End blade, 10...Medium blade, 12...Medium blade holder, 41...End blade holder support rod, 51...Fixed Support rod, 81...Movable support rod.

Claims (1)

[Scope of utility model registration request] An end blade support rod 41 that supports the end blade holder 2 that supports the countersink 3 and a fixed support rod 51 that supports the beam 1 on the far side in front of the middle blade 10 are arranged in the fixed part of the balance, and the beam 1 A movable support rod 81 that supports the middle blade 10 at the rear thereof is made movable in the vertical direction, and by upward movement of the movable support rod 81, the end blade is initially 9 descends and leaves the end blade holder 2,
The balance stopping device is constructed by selecting the relative positions of the support rods 41, 51, 81 so that the intermediate blade 10 is separated from the intermediate blade receiver 12 by the arc rotation of the beam 1 with the fixed support rod 51 as the fulcrum.