JPS6032631Y2 - Lid tightening device for fresh concrete entrained air amount measuring device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for tightening a lid on a container containing a sample, that is, fresh concrete, in an instrument for measuring the amount of air entrained in fresh concrete.

The measuring device is a cylindrical container with a protruding flange C on the outer periphery of the upper edge, and a lid a equipped with a pressure gauge and other measuring equipment d is attached to the upper opening of the container, and the sample contained in the container is sealed. Conventionally, four fasteners are generally used to open and close the lid a of the container, and the lower edge of the fasteners is attached to the lower surface of the flange C of the container, and the upper end of the C-shaped metal fitting is attached to the lid side. Attach it by pressing the set screw inserted into the upper end of the C-shaped metal fitting onto the top surface of the lid.
According to this method, the lid is tightened and released by turning a locking screw on each new surface, which not only makes the operation extremely complicated, but also causes individual differences in the tightening pressure. It was difficult to tighten evenly.

The present invention improves this by making the tightening and releasing operations a single operation, which greatly simplifies handling, and the tightening pressure at the four locations is evenly applied at a functionally set strength. This eliminates individual differences, and this will be explained with reference to the illustrated embodiment.

In the drawings, reference numeral 1 denotes bearing pieces fixed at four locations on the upper surface of the periphery of the lid a, and each bearing piece 1 is provided with a grip piece 2 whose tip is pivotally supported and is rotatable up and down.

The gripping piece 2 has an arcuate shape that can be easily held and raised with one hand, and the upper end of a clamp 4 is pivoted 5 to the intermediate portion offset from the shaft support 3.

The upper and lower ends of the clamp 4 are bent inward, and the lower end 6 is engaged with the lower surface of the upper line flange C of the container, and the intermediate point between the shaft attachment part 5 and the displaced clamp 4 Bearing piece 1 mentioned above as 7
A tension spring 9 is tensioned between the grip piece 2 and the inner position 3 which is offset from the shaft support 3.

Therefore, as will be described later, when the lid is closed by the tightening operation caused by the rotation of the grip piece 2, the tension spring 9 urges the lower end 6 of the clamp 4 to be positioned on the lower surface of the flange C, and the tightening is released. When the lid is opened, the lower end 6 of the clamp 4 is biased in the direction of separating from the lower surface of the flange C.

An adjustment screw 10 is inserted into the lower end 6 of the clamp 4 so that it can move forward and backward toward the lower surface of the flange C, and the lock nut 11 is screwed into the adjustment position.
It was fixed with.

Further, a connecting tool 12 made of an elastic material bent into a U shape is provided on the outer surface of the clamp 4, and by fitting the handle rod 2 between the clamping pieces on both sides, the gripping piece 2 and the clamping piece 4 are temporarily integrated. The connection was made to the extent that it could be easily released manually, but the connection tool 12 could also be provided on the grip piece 2 side with the same effect, and the four fasteners arranged around the periphery of the lid a. All attached devices must be configured as described above.

In the figure, e indicates an annular sealing backing material provided on the inner surface of the lid a.

The operation of the tightening device constructed as described above will be explained with reference to FIGS. 6 to 9.

FIG. 6 shows the state when the lid is closed in the same way as FIG. The dimension between the upper end shaft attachment part 5 of the clamp 4 is adjusted in advance by advancing and retreating the screw 10, and since the shaft attachment part 5 is located perpendicularly to the shaft support 3 of the grip piece 2, the lid a is not attached to the container. The backing e is tightened while being pressed, and the lid is closed in a perfect tightening relationship.

In order to loosen the clamp and open the lid from this situation, as shown in Figure 7, if the grip piece 2 is tilted outward approximately horizontally, the shaft mounting part 5 will move downward, so the lower end will protrude from the clamp 4. The tightening is released by separating from the lower surface of the collar C, and the lower end of the clamp 4 is supported by the side wall of the container, so the grip piece 2 enters between the grip pieces on both sides of the connector 12 due to its pressure, and becomes elastic. be held between.

Then, when the grip piece 2 is raised again as shown in the eighth figure, the clamp 4 is also moved upward due to the temporary connection by the connector 12, so that the lid a can be removed from the container. .

At this time, the tension spring 9 applies a tensile force at the inner position beyond the lower shaft support 3 of the grip piece 2 and the shaft attachment part 5 of the grip piece 2 and the clamp 4, so the grip piece 2 and the clamp 4 are Both are securely held in the upward movement position away from the container side, and do not interfere with opening the lid.

Next, in order to operate the tightening from the above-mentioned open state, as shown in Figure 9, once the grip piece 2 is tilted outward, at the same time, the clamp 4 is pushed down against the grip piece 2 with the fingers, and at least If the line of action of the tension spring 9 is moved downward from the shaft attachment part 5, the clamp 4 will automatically rotate downward due to the tension force, and its lower end 6 will be located on the lower surface of the flange C. When the grip piece 2 is raised upwardly, the tightening mode shown in FIG. 6 is achieved.

As described above, the opening operation of the lid is performed in one operation of moving the grip piece 2 from the state shown in the sixth figure to the state shown in the seventh figure and then continuously to the state shown in the eighth figure, and the tightening operation is performed in the eighth figure. This can be reliably accomplished by one operation from the illustrated state to the ninth illustrated state and then to the sixth illustrated state.

In order to avoid hindrance to the lid opening operation in the above operation, as shown in FIG. However, even without the connector 12, the above objective can be achieved by adding four manual operations, and the operation in this case is shown in FIGS. 10 to 13. explain.

Similarly to Fig. 6, in order to loosen the clamp from the tightened state shown in Fig. 10 and open the lid, as in the previous example, once the grip piece 2 is brought down approximately horizontally, the clamp 4 is moved downward as shown in Fig. 11. At this time, the line of action of the tension spring 9 is in a downward position beyond the shaft attachment part 5, so that the lower end 6 of the clamp 4 is positioned on the lower surface of the flange C, and then the grip piece 2 is moved upward, but the clamp 4 cannot be attached because the connector 12 is missing, but the grip piece 2
Simultaneously with the upward movement, the clamp 4 is manually moved slightly upward to cause the line of action of the tension spring 9 to pass above the shaft attachment part 5, as shown in Figure 12. Tighten with 4
moves up integrally with the grip piece 2 to hold the clamp 4 in the upward movement position that does not interfere with the lid opening operation as in the previous example shown in FIG. Once the clamp 4 is stabilized in that position, if you want to perform a tightening operation from this state, the grip piece 2 is once tilted outward and the clamp 4 is lowered by the force of the tension spring 9 as shown in Figure 11. After the lower end 6 is positioned on the lower surface of the flange C, the grip piece 2 is raised again to achieve the tightening state shown in FIG. 10. In this embodiment, when the lid is opened, Clamp 4 in the downward position
Although it requires an auxiliary action to manually move up against the spring 9, the tightening action requires an action to release the temporary connection between the grip piece 2 and the clamp 4 by the connector 12 in the previous example. In any of the above embodiments, the tension spring 9 acts to positively position the lower end 6 of the clamp 4 on the lower surface of the flange C during the tightening operation. When the lid is opened by releasing the clamp, the grip piece 2 and the clamp 4 are effectively held in an upward movement position where the lid is moved away from the container side and does not interfere with the opening of the lid.

It should be noted that there is also the advantage that wear of the backing e over time can always be adequately compensated for by the adjusting screw 10.

In this way, according to the present invention, a tension spring is provided between the intermediate point 7 of the upper end of the clamp 4 relative to the grip piece 2 which is offset from the shaft attachment part 5 and the inner position 8 of the grip piece shaft support 3 of the bearing piece 1. By tensioning 9, when the grip piece 2 is rotated to perform a tightening operation, the lower end 6 of the clamp 4 that has moved downward can reliably enter the lower surface of the flange C of the container. When the lid is opened by releasing the lid, both the grip piece 2 and the clamp 4 can be held in an upward position that does not interfere with the opening of the lid when the lid is separated from the container, and the tightening operation simply moves the grip piece 2 upward. Since the clamping force is adjusted accordingly, there is no difference in tightening between individuals, and the circumferential edge of the lid a can be tightened evenly at each part, which has the effect of simplifying the handling and operation of the measuring instrument. .

[Brief explanation of the drawing]

Figure 1 is a side view with a dilated view of a part of the measuring instrument according to the present invention, Figure 2 is a plan view, Figure 3 is a side view of the tightening device, and Figure 4 is a side view of the measuring instrument according to the present invention.
The figure is a plan view thereof, FIG. 5 is a front view thereof, and FIGS. 6 to 9 and 10 to 13 are partial side views illustrating the tightening operation. a...Lid, b...Container, C...
- Tsuba, 1...Bearing piece, 2...Grip piece,
3... Axial support of grip piece, 4... Clamping, 5
......shaft attachment part at the upper end of the clamp, 6... lower end of the clamp, 7... midpoint of the clamp, 8... inner side of the bearing piece. Position, 9... tension spring.

Claims (1)

[Scope of utility model registration request] A grip piece 2 is provided with its tip pivotably supported on a bearing piece 1 arranged and fixed on the upper circumferential edge of the lid a, and can be rotated up and down. The upper end of the clamp 4 that is intended to be locked to the lower surface of the upper peripheral protruding flange C is pivoted 5, and the intermediate point 7 between the pivoted part 5 and the displaced clamp 4 is connected to the grip piece axis of the bearing piece 1. A tension spring 9 is stretched between the inner positions 8 of the branch 3, and when the lid is closed by the rotation of the grip piece 2, the lower end 6 of the clamp 4 is positioned on the lower surface of the flange C by the tension spring 9. A lid tightening device for a fresh concrete entrained air amount measuring device configured to bias the lid so that the lid is opened by tightening and releasing the lid, and to bias the lower end of the clamp 4 in a direction to separate from the lower surface of the flange C.