JPS603406Y2 - Sliding door damper device - Google Patents

Description

[Detailed Description of the Invention] In the present invention, a sleeve 3 is fitted around the outer periphery of a piston shaft 2 inserted into a cylinder 1, and a locking flange piece 4 is provided around the outer periphery of one end of the sleeve 3. A packing 5 is slidably fitted on the outer periphery of the piston shaft 2 along the axial direction of the piston shaft 2, so that the contact piece 6 at the base of the packing 5 can be brought into close contact with and removed from the locking collar piece 4. 1, a sliding contact piece 7 that comes into elastic contact with the inner periphery of the piston shaft 2 is extended, a circulation groove 8 extending in the axial direction is formed in at least one of the inner periphery of the packing 5 and the outer periphery of the sleeve 3, and the piston shaft 2 is formed hollow. A wire 18 to which a sliding door is attached is inserted into the piston shaft 2 of the lever, a bushing 20 is attached to one end of the piston shaft 2, and a fixing piece 17 is fixed to the wire 18. The wire 18 is tensilely biased in a direction in which the piston shaft 2 is brought into contact with the inner surface of the cylinder 1 and protrudes from the cylinder 1;
This damper device for a sliding door consists of a piston shaft 2 that is resiliently biased by a return spring 19 in a direction opposite to the tensile biasing direction of a wire 18, and its purpose is to smoothly switch and operate the damping effect. Another object of the present invention is to provide a damper device for a sliding door that can ensure damper operation.

In the conventional damper, the gasket 5' is formed as shown in FIG. 6, and a communication hole 9 is formed in the close contact piece 6'. Since the distance to the outer edge of the cylinder 1 is short, the fluid inside the cylinder 1 easily leaks from the communication hole 9 through between the locking flange piece 4 and the sealing piece 6' of the sleeve 3, and the inner periphery of the packing 5' and the outer periphery of the sleeve 3. Since the entire surface of the sleeve 3 is in close contact with the sleeve 3, it is difficult for the gasket 5' to move smoothly with respect to the sleeve 3, making it impossible to perform smooth switching.

The present invention has been developed in view of the above points, and will be explained in detail below using Examples.

The sleeve 3 is formed into a cylindrical shape, and a locking collar piece 4 is provided around one end thereof.

This sleeve 3 is fixed to the piston shaft 2 with a screw-like or pin-like fixture 11 that covers the tip or midway of the piston shaft 2 and passes through the mounting hole 10.

The packing 5 is made of an elastic material, and has several circulation grooves 8 recessed in its inner periphery in the axial direction as shown in FIG. A sliding contact piece 7 in the shape of a truncated cone extends from the close contact piece 6.

This packing 5 is fitted onto the outer periphery of the sleeve 3,
It can be slid in the axial direction of the piston shaft 2 between the locking flange piece 4 and the head of the fixture 11 on the outer periphery of the sleeve 3.

As shown in Fig. 1, the piston shaft 2 is inserted into a cylinder 1 filled with fluid such as air or oil, and the sliding contact piece 7 slides on the inner circumference of the cylinder 1 due to the reciprocating movement of the piston shaft 2. do.

In Fig. 1, 12 is the cap attached to the cylinder 1, and 13 is the cap attached to the cylinder 1.
14 is a felt impregnated with oil, 14 is a mounting bracket, 15 is a bypass that communicates the left and right chambers of the cylinder 1 divided by the packing 5, and 16 is a regulating valve attached to the bypass 15.

In the present invention, when the piston shaft 2 moves in the direction of protruding from the cylinder 1, the gasket 5 moves on the sleeve 3 due to the resistance of the fluid in the cylinder 1, as shown in FIG. A gap is created between the sealing piece 6 and the sealing piece 6, and a path for fluid to pass is formed on the left and right sides of the packing 5 by the gap between the locking flange piece 4 and the sealing piece 6 and the circulation groove 8, and the sliding contact piece 7 Since the fluid passes through the tip of the piston shaft 2, the piston shaft 2 moves smoothly with less fluid resistance.

Furthermore, when the piston shaft 2 moves in the direction of insertion into the cylinder 1, the gasket 5 moves due to the resistance of the fluid as shown in Figure 3, and the locking flange piece 4 and the contact piece 6 come into close contact with each other, allowing the flow of fluid. The flow path formed by the groove 8 is closed, and the sliding contact piece 7 also comes into close contact with the inner periphery of the cylinder 1 due to its resistance to the fluid.

In this way, fluid circulation between the right and left sides of the gasket 5 is prevented.

As a result, the piston shaft 2 gradually moves while absorbing shocks and the like.

The flow groove 8 may be provided on the outer periphery of the sleeve 3 as shown in FIG. 4, or may be provided on both the outer periphery of the sleeve 3 and the inner periphery of the packing 5.

Figures 5a and 5b specifically show the damping effect of the damper when the sliding door is opened and closed.The piston shaft 2 is formed hollow and inserted into the left and right sides of the cylinder 1.
A wire 18 with a fixing piece 17 fixedly installed inside the piston shaft 2 is passed through.

Further, a return spring 19 is attached to the piston shaft 2, and urges the piston shaft 2 toward the left in the figure.

A door or the like is attached to the right side of the wire, and the wire 18 is pulled to the right by a spring or the like.

In this case, when the sliding door is moved to the left and the sliding door is opened, the wire 18 also moves to the left along with the sliding door in the state shown in FIG. While in contact with the piston shaft 2, the return spring 1
When the sliding door is moved to the left by the force of the spring 9, and the sliding door is further moved to the left, the piston shaft 2 no longer moves as shown in FIG. Can be opened over a distance greater than the stroke.

When you release your hand from the sliding door with the sliding door open in this way, the wire 18 will begin to return due to the return force to move the sliding door to the right, and when the wire 18 moves to the position where the fixed piece 17 abuts the bushing 20, it will move here. The sliding door will gradually close due to the action of the damper.

As mentioned above, in the present invention, when the sliding door is opened and the sliding door is automatically closed by the return force of the tension-energized wire, a damper consisting of a cylinder, a piston shaft, a gasket, etc. is used. The sliding door is designed to gradually close due to the buffering effect, and the damper device for such a sliding door operates the piston shaft as a damper, then opens the sliding door and returns the door to its original state before the damper was activated (i.e. 5A to 5S), the piston shaft is elastically biased by the return spring in the direction opposite to the direction of the tensile biasing force of the wire, so the spring force of the return spring forces the piston shaft. The piston shaft can be returned to a state where the damper operates, and the damper device can reliably perform the damping action when the sliding door is closed again by reliably returning the piston shaft.

In addition, since at least one of the inner periphery of the packing and the outer periphery of the sleeve is provided with a circulation groove extending in the axial direction, the contact area between the inner periphery of the packing and the outer periphery of the sleeve can be made small in the area of the circulation groove. The friction between the two is reduced, allowing the packing to slide smoothly on the sleeve, which has the advantage of allowing smooth switching and operation of the buffering effect. Since it is not formed by drilling holes in the contact piece, the distance from the circulation groove to the outer periphery of the contact piece can be made larger, and the contact area between the contact piece and the locking flange piece outside the circulation groove can be increased. By increasing the size, it is possible to prevent fluid from leaking in this area, which has the advantage of ensuring that the buffering effect operates reliably.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the schematic structure of the present invention-embodiment;
The figure is a partially cutaway enlarged perspective view of the same packing as above, Figure 3a,
b is a partially cutaway enlarged sectional view showing the same effect as above; FIG. 4 is a perspective view showing another embodiment of the sleeve as above; FIGS.
6 is a reduced sectional view of the same state of use as above, and FIG. 6 is an enlarged sectional view of the conventional example, in which 1 is a cylinder, 2 is a piston shaft, and 3 is an enlarged sectional view of a conventional example.
4 is a sleeve, 4 is a locking flange piece, 5 is a packing, 6 is a contact piece, 7 is a sliding contact piece, 8 is a circulation groove, 17 is a fixed piece, 18 is a wire, 19 is a return spring, and 20 is a bushing.

Claims (1)

[Scope of utility model registration request] A sleeve is fitted around the outer periphery of the piston shaft to be inserted into the cylinder, and a locking flange piece is provided around the outer periphery of one end of the sleeve.
A packing is slidably fitted on the outer periphery of the sleeve along the axial direction of the piston shaft, and the contact piece at the base of the packing can be brought into close contact with and removed from the locking flange piece, and the sliding part elastically contacts the inner circumference of the cylinder from the base of the packing. The contact piece is extended, a circulation groove extending in the axial direction is formed in at least one of the inner periphery of the packing and the outer periphery of the sleeve, the piston shaft is formed hollow, and a wire to which a sliding door is attached is inserted into the piston shaft. , a bushing is attached to one end of the piston shaft, and a fixing piece is fixed to the wire, and the fixing piece contacts the inner surface of the bushing and tensions the wire in a direction that causes the piston shaft to protrude from the cylinder; A sliding door damper device in which a piston shaft is resiliently biased by a return spring in a direction opposite to the tension biasing direction of a wire.