JPH035692Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field: This invention involves fitting a pair of cylindrical bodies in a nested manner.
This invention relates to a damper rod having an elastic shock absorbing function and having a gas spring filled with a pressurized gas installed therein.

Prior Art: It is well known that elastic bodies are used to connect important parts of machinery and equipment when a buffer function is required. Known examples of this elastic body include mechanical ones such as coil springs, air springs, oil dampers, and gas dampers, and ones molded from rubber materials.

Moreover, these elastic bodies are sometimes used in combination with other parts.

However, regarding combination with other parts,
Not only does it inevitably become structurally complex, but it is generally a structure that is effective only in the compression direction, and a simple structure that acts in both expansion and contraction directions has not yet been completed in a practical state. do not have.

Purpose of the invention: The present invention was developed in view of the current situation, and it is possible to combine a gas spring of a known structure with a telescoping rod to provide a buffering function against external forces in the direction of expansion and contraction with a simple structure. The aim is to create a damper rod that can be used.

Structure of the invention: The invention consists of a telescoping cylindrical rod of a required length and a gas spring disposed inside the telescoping cylindrical rod. A pair of elongated holes with a length slightly shorter than the free length of the gas spring are bored in the cylinder body in the axial direction, and a receiving piece at one end of the gas spring that fits into the inner diameter of the rod on the fitting side and a receiving piece at the other end of the gas spring are formed. It is a telescopic combination type rod in which a receiving pin is attached and locked to the end receiving piece by penetrating the elongated hole at the fitted part.

Attachment pieces are provided at both ends of the rod. Various types of attachment pieces can be attached.

Embodiments and operations: The embodiments of the present invention will now be described in detail with reference to the drawings, as shown in FIGS. 1 to 4.

In the figure, reference numeral 1 denotes a telescoping rod formed by combining an outer cylinder 2 and an inner cylinder 3 to be extendable and retractable.

The outer cylinder 3 and the inner cylinder 3 of this rod 1 have elongated holes 4 and 5 formed at symmetrical positions in the axial direction at the fitting portions. Both holes 4 and 5 have the same length.

A gas spring 6 is installed inside the inner and outer cylinders 2 and 3.
(a pressure cylinder of a known structure filled with nitrogen gas and oil) is provided, and this gas spring 6 has a receiving piece 7 fitted into the inner cylinder 3 at the rear end of the cylinder 6'. Fitted and supported in the bottom hole 7',
The tip of the cylinder rod 6'' is fitted into a bottomed hole 8' of a receiving piece 8 fitted into the opposite end of the inner cylinder 3, and a symmetrical hole is formed on the outer periphery of both receiving pieces 7 and 8. A screw hole is drilled at the position, and locking pins 9 and 9' are screwed through the long holes 4 and 5 of both the inner and outer cylinders 2 and 3 into the screw holes, and the gas spring 6 is free. It was assembled in a state where it was slightly shorter than the length, and the configuration shown in Fig. 1 was obtained in the no-load state.

In addition, there are mounting pieces 10, 1 on both ends of the rod 1.
0' is provided, and it is attached to the object by means of these attachment pieces 10, 10'.

With this configuration, if it is fixed to equipment, devices, equipment, etc. that require cushioning properties, for example, via the end attachment pieces 10, 10',
In the no-load state, the piston 6 of the gas spring 6
Due to the thrust acting on point a, both receiving pieces 7 and 8 abut the implanted pins 9, 9, 9' and 9' on the ends of elongated holes 4 and 5, respectively, and are in the state shown in the first figure. and rod 1
When a pressing force is applied to the rod 1, since both the inner and outer cylindrical bodies 2 and 3 are nested, the rod 1 is moved through the pins 9, 9, 9', and 9' that are fixed to the ends of the elongated holes 4 and 5, respectively. As shown in FIG. 3, it is compressed against the thrust of the gas spring 6. In addition, when a tensile force is applied in the opposite direction, as shown in FIG. is engaged, the gas spring 6 is also compressed, and the rod 1 is expanded.
Therefore, since the gas spring 6 is compressed in either direction, its restoring force can be utilized to exhibit a buffering function.

As the rod 1 is displaced in either direction of expansion or contraction, the inner cylinder 3 is designed to slide over a relatively long distance within the outer cylinder 2.
Even if the gas spring 6 has a small diameter, it operates correctly in the axial direction and does not cause any failure.

Effects of the invention: According to the rod of the invention, by using a known gas spring, the compressive force can be used as it is in either direction of expansion or contraction to provide a buffering function, and the structure is simple. It can be said that this is a useful tool that can be used in a wide range of fields.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of one embodiment of the rod of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a view showing the rod in a compressed state, and FIG. 4 is a view showing the rod in an expanded state. 1...Rod, 2...Outer cylinder, 3...Inner cylinder, 4, 5...Elongated hole, 6...Gas spring, 6'...Cylinder,
6″...Cylinder rod, 7,8...Receiving piece, 7',
8'...bottomed hole, 9,9'...locking pin, 10,10'
...Mounting piece.

Claims (1)

[Scope of utility model registration request] It consists of a telescoping cylindrical rod of the required length and a gas spring disposed inside this telescoping cylindrical rod.At the fitting part of the cylindrical rod, gas springs are installed in each axial direction on both the inner and outer cylinders. A pair of elongated holes with a length slightly shorter than the free length of the inner cylinder are formed, and the holes are fitted into one end receiving piece of the gas spring that fits into the inner diameter of the inner cylinder body, and the other end receiving piece of the gas spring. What is claimed is: 1. A damper rod characterized in that a locking pin is inserted through each elongated hole in each section to engage with the end of the elongated hole of each cylindrical body.