JPH0514237Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a hold-down assembly in which a hold-down bar is connected to a guide tube by a pin.

“Conventional technology” Conventionally, burnable poison, simple plug,
As shown in FIGS. 5 and 6, the hold-down assembly used to construct an assembly of neutron sources, etc. has a guide tube 2 installed inside a central cylindrical portion 1a of a hold-down bar 1. Between the end plate 4, which is vertically movable by a pin 3 and attached to the lower part of the guide tube 2, and the central tube portion 1a,
A spring 5 is attached around the guide tube 2. The pair of pins 3 are formed in a pair of circular holes 1c formed in the central cylinder part 1a and in the guide cylinder 2 in a direction perpendicular to the support part 1b projecting left and right from the central cylinder part 1a. The guide hole 2a is inserted into a pair of elongated guide holes 2a that are long in the vertical direction.

"Problems to be solved by the invention" However, in the conventional hold-down assembly described above, the hold-down bar 1 and the guide tube 2 are
Since the pin 3 connecting the hold-down bar 1 is provided in a direction perpendicular to each support portion 1b of the hold-down bar 1, when the hold-down bar 1 is pushed upward by the spring 5, the hold-down The bar 1 rotates about each pin 3 as a fulcrum, and the hold-down bar 1 cannot be maintained horizontally, and as shown in FIG. 6, the hold-down bar 1 may stand still in an inclined state. In this case, each locking hook 6a of the hanging tool 6 may not be able to properly engage with the support portion 1b of the hold-down bar 1, and there is a possibility that the hold-down bar 1 may not be completely held.

This invention was made in view of the above circumstances,
The objective is to provide a hold down assembly that allows the hold down bar to be maintained horizontally and to improve engagement with the sling.

"Means for Solving the Problem" In order to achieve the above object, the present invention provides a hold-down bar having a pair of horizontally protruding support parts near each support part and above and below each support part. It is connected to the guide cylinder by a pin provided at a position that prevents rotation in the direction.

"Operation" In the hold-down assembly of the present invention, the hold-down bar and the guide tube are connected by pins installed near a pair of support parts of the hold-down bar. maintain horizontal position.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 and 2. Note that in this example, the fifth
Components having the same configuration as those of the above-mentioned conventional example shown in FIG. 6 and FIG.

10 in the figure is a hold-down bar, and this hold-down bar 10 is composed of a central cylindrical part 11 into which the guide cylinder 2 is fitted, and a support part 12 that protrudes left and right from this central cylindrical part 11. There is.
Further, a pair of circular holes 11a are formed in the lower part of the central cylindrical portion 11 at positions parallel to each of the support portions 12, symmetrically with respect to the center of the central cylindrical portion 11. A pair of pins 3 are inserted into these circular holes 11a and a long hole 2a formed in the guide tube 2.
As a result, the hold down bar 10 and the guide tube 2
are connected.

In the hold-down assembly configured as described above, the hold-down bar 10 and the guide tube 2
A pair of pins 3 that connect the Each support part 12 of the down bar 10 is not tilted in the vertical direction, and each support part 12 is reliably maintained horizontally. Therefore, the locking hooks 6a of the sling 6 are smoothly engaged with each support 12, and the sling 6 can hang the hold-down assembly in a fully engaged state.

3 and 4 show another embodiment of the present invention. In this embodiment, the central cylindrical portion 21 of the hold-down bar 20 is parallel to the supporting portion 22 projecting left and right. The hold-down bar 20 and the guide tube 2 are connected by inserting four pins 3 at intermediate positions between the direction perpendicular to the support portion 22 and the direction perpendicular to the support portion 22. Note that the other configurations are the same as those in the above embodiment, so the same reference numerals are given and the explanation will be omitted.

In the hold-down assembly configured in this way, the hold-down can be carried out by inserting the four pins 3 at intermediate positions between the direction parallel to the support part 22 and the direction perpendicular to the support part 22. Since the bar 20 and the guide tube 2 are connected, the hold down bar 20 is reliably supported at four points, and the support part 22
horizontal state is maintained. Therefore, when suspending the hold-down assembly with the hanger 6, the locking hook 6a of the hanger 6 is smoothly engaged with the support portion 22, so that the engagement between the hanger 6 and the hold-down bar 20 is improved. can be improved.

"Effects of the Invention" As explained above, according to the present invention, a hold-down bar having a pair of horizontally protruding support parts can be moved closer to each support part and each support part can be rotated in the vertical direction. By connecting the hold-down bar support part to the guide tube with a pin provided at a position to prevent this, the horizontal state of the support part of the hold-down bar can be maintained reliably, and the engagement between the support part and the hanging tool can be improved. This has an excellent effect in that the hold-down bar can be easily held by the hanger.

[Brief explanation of the drawing]

Figures 1 and 2 show one embodiment of the present invention, with Figure 1 being a plan view, Figure 2 being a side view, and Figures 3 and 4 showing other embodiments of the present invention. 3rd thing
The figure is a plan view, FIG. 4 is a side view, and FIGS. 5 and 6 are conventional hold-down assemblies.
The figure is a plan view, and FIG. 6 is a side view. 2... Guide tube, 3... Pin, 10... Hold down bar, 12... Support part, 20... Hold down bar, 22... Support part.

Claims (1)

[Claims for Utility Model Registration] (1) A hold-down bar having a pair of horizontally protruding support parts, a guide tube into which this hold-down bar is slidably fitted, and a guide tube attached to the hold-down bar. At the same time,
A hold-down assembly including a plurality of pins that are slidably engaged with guide holes formed in the guide tube along the axial direction, wherein each of the pins is arranged at a position that is lower than a position orthogonal to each of the supports. A hold-down assembly characterized by being provided closer to a support part. (2) The hold-down assembly according to claim 1, wherein each of the pins is provided at a position parallel to each support portion of the hold-down bar. (3) A utility model registration claim characterized in that each of the pins is provided on the hold down bar at an intermediate position between a direction parallel to each of the support parts and a direction perpendicular to each of the support parts. Hold-down assembly according to scope 1.