JPH0229344Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] A constant hanger is known as a device that always supports piping that is displaced by heat with a constant load. Since the direction of displacement of the piping differs depending on the support point, before shipping the product, the spring is compressed to a position determined in advance at the design stage and then locked to the hanger body. When testing the water pressure of piping, the weight of water is added, so a lock is also required.
The present invention relates to a locking device that facilitates this locking.

[Prior Art] Japanese Patent Publication No. 55-40790 and Utility Model Publication No. 54-41372 are known as structures for locking a rotating arm to a hanger body. The former is a nut 1 screwed into a threaded rod 9.
1 is supported by a bracket 10. The latter has a structure in which a key-shaped support plate 44 is provided on the frame 1, a threaded rod 42 locked to the end of the rotating arm 6 is inserted into a notch in the support plate 44, and tightened with a locking nut 45. All of these structures use screws, but it is often necessary to lock and release the rotating arm.
Furthermore, the threaded rods described above require a considerable length, and the distance the nut must travel during locking and unlocking is also long. It was unbearable to have to turn Natsu every time.

[Means for solving the problem] The threaded rod conventionally interposed between the frame and the rotary arm is eliminated, and the rotary frame can be directly locked with the tip of a lock piece inserted perpendicularly into the frame so as to be removable. For this purpose, a rack is fixed to the rotating frame, and teeth are provided at the tip of the lock piece to mesh with the rack.

It is desirable that the rack be an arc centered on the base axis of the rotary arm, but for convenience of machining and installation, the rack should be in the tangential direction of this arc. The lock piece is rotatable so that it can be engaged with the lock piece without any difficulty.

Use a threaded fastener to press the lock piece into the rack. This screw only engages or disengages the tip of the lock piece with the rack, and since it is used for adjustment in and out of a very short section, turning it is not a troublesome task.

[Example] Configuration - The cylinder 1 is provided with a lid 2 at one end. The frame 3 is fixed at right angles to the lid 2. The rotating arm 4 has a bifurcated shape and is pivotally connected to the frame 3 by a shaft 5 at a bent base. A tension rod 6 passes freely through the lid 2 and one end is pivotally connected to one end of the rotating arm. The other end is provided with a spring holder 7, and a spring 8 is inserted between this and the lid 2. An eye bolt 9 is suspended from the other end of the rotating arm to support the downward load. The above structure is known as a constant hanger.

The rack 10 is then fixed to the rotary arm in the tangential direction of the arc centered on the shaft 5. Lock piece 11
is provided with teeth that engage with the rack 10 at one end, and a handle 11a at the other end. A nut 12 is fixed at a suitable position on the frame, and a lock piece 11 inserted into the nut 12 slidably passes through the frame and engages with the rack 10. Nut 12 and Lock Piece 1
1, a fastening fitting 13 is inserted between them. The fastening fitting 13 has a hole through which the handle 11a freely passes. It is also provided with an outer diameter screw that is screwed into the nut 12, so that the lock piece can be pressed into the rack by screwing.

[Operation] With the lock piece removed from the rack,
Press the spring 8. When the required spring pressure is reached, the lock piece is operated with handle 11a to engage the tip with the rack. Then turn the clamp to press the lock piece and prevent it from coming off.

[Effect] Frees you from the traditional labor of moving nuts along a long threaded rod. Locking and releasing can be achieved instantly with simple operation of the tightening fittings.

[Brief explanation of the drawing]

FIG. 1 is a front view of the constant hanger, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged explanatory view of the engaging portion. 1-tube, 2-lid, 3-frame, 4-rotating arm, 5-shaft, 6-tension rod, 7-spring holder, 8-
Spring, 9-eye bolt, 10-rack, 11-lock piece, 11a-handle, 12-nut, 13-
Fastening fittings.

Claims (1)

[Scope of utility model registration request] In a constant hanger equipped with a bifurcated rotating arm pivotally connected to the frame at a bent base, a rack is fixed to the surface of the rotating arm in the tangential direction of an arc centered on the pivot point, and the above-mentioned rack is attached to the tip. A locking device for a constant hanger consisting of a lock piece having teeth that can be engaged with each other and a handle that is slidably inserted into a frame, and a tightening fitting that is screwed into a nut fixed to the frame and can press the lock piece into the rack. .