JP3858180B2 - Shaft slide lock device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shaft slide lock device capable of fixing a sliding shaft at a predetermined position, or, when the shaft is fixed, sliding an instrument attached to the shaft along the shaft and fixing it to a predetermined position. Is.
[0002]
For example, there are various uses such as setting a shower holding position in a bathroom to a desired height above and below, or setting a spotlight to a desired height on the wall surface.
[0003]
[Prior art]
Conventionally, when a sliding shaft is to be locked at a predetermined position, as shown in FIG. 5, there is a structure in which the shaft 7 is fastened to a hardware 9 on which the shaft 7 slides by using a bolt 9a. In this case, both ends of the shaft 7 could be fixed and the hardware 9 could be slid.
[0004]
[Problems to be solved by the invention]
However, in the conventional structure, when the shaft 7 is fixed at a different position, it is necessary to loosen the bolt 9a and move the shaft 7 each time and tighten the bolt 9a again, which takes time and effort.
Further, if the bolt 9a is not sufficiently tightened, the shaft may move with a small force.
[0005]
The present invention has been made in view of the above-mentioned circumstances, eliminates the conventional drawbacks, and is configured to slide freely in one direction only by moving by hand, and not move below a predetermined force in the other direction. A shaft slide lock device is to be provided.
[0006]
[Means for Solving the Problems]
The shaft slide lock device of the present invention comprises a bottomed cylindrical case body and a case cover detachably attached to the opening thereof, and a case with a shaft passing through the center,
A taper ring that is inserted in this case so as to be slidable in the axial direction, has a tapered surface formed by a frustoconical space at the shaft center, and stops at a stopper portion on one end side in the case;
A friction piece that fits into the taper surface of this taper ring, has a shaft projecting through the shaft, and is radially divided into a plurality of axial directions,
A piece spring disposed between one end inside of the case body and the friction piece;
A backup spring disposed between the inside of the case cover and the taper ring;
The case cover is characterized in that the ring portion along the shaft hole protrudes to a position where it contacts the friction piece at its moving end, and the elastic force of the backup spring is larger than the elastic force of the piece spring.
[0007]
The shaft slide lock device of the present invention comprises a bottomed cylindrical case body and a case cover that is detachably attached to the opening thereof, and a case in which the shaft passes through the center,
A taper ring that is inserted in this case so as to be axially slidable, has a tapered surface formed by a frustoconical space at the shaft center, and a ring cover through which the shaft passes is fixed to one end side;
A friction piece that fits into the taper surface of this taper ring, has a hole through which the shaft passes through the shaft center, and is divided into a plurality of pieces radially in the shaft center direction;
A piece spring disposed between the ring cover and the friction piece;
A backup spring disposed between the inside of the case cover and the taper ring;
The case cover is characterized in that a ring portion along the shaft hole protrudes to a position where it comes into contact with the friction piece at its moving end.
[0008]
Furthermore, the shaft slide lock device of the present invention comprises a bottomed cylindrical case body and a case cover that is detachably attached to the opening of the case. A tapered surface with a frustoconical space is formed in the shaft center, and a taper ring that stops at a stopper part on one end side in the case, and is fitted to the taper surface of this taper ring, and the shaft is A friction piece that is radially divided in the axial direction, and a backup spring disposed between the inside of the case cover and the taper ring. lower ring portion along the shaft hole is, at its moving end to the friction piece protrudes to a position abutting, in a state where the small diameter side of the truncated cone in which the tapered surface is formed downward, the friction piece is by its own weight Thus being moved to.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 is a longitudinal sectional view showing an embodiment according to claim 1 of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a friction piece in which an external force acts on the shaft in the apparatus of FIG. FIG. 4 is a longitudinal sectional view showing an embodiment according to claim 2 of the present invention.
1 to 3, reference numeral 8 is composed of a bottomed cylindrical case body 5 and a case cover 6. The shaft 8 penetrates the case 8, the taper ring 3 is inserted, and the opening A case cover 6 is detachably attached. The case cover 6 may be attached and detached with screws (not shown), but as shown in the figure, a plurality of claws 6b are formed at the tip of the portion of the case cover 6 that fits into the opening of the case body 5, and the claws 6b and 6b A snap fit structure may be used in which a gap is formed between the claws 6b and the claw 6b moves inward to engage with the groove of the case body 5 when fitted.
Further, the ring portion 6 a along the shaft hole through which the shaft 7 passes projects at a position where the friction piece 1 comes into contact with the moving end of the friction piece 1.
[0010]
The taper ring 3 is inserted into the case body 5 so as to be slidable in the axial direction, and a tapered surface 3a is formed on the shaft center by a frustoconical space, and a stopper portion 5a which is a wall on one end side of the case body 5 is formed. It stops and can slide to the case cover 6 to the other side.
A friction piece 1 is inserted into the truncated conical space of the taper ring 3 so as to be fitted to the taper surface 3a. The friction piece 1 has a hole 1a through which the shaft 7 penetrates the shaft center. And is divided into two in the axial direction (FIG. 2). However, it may be divided into three or more.
[0011]
A piece spring 2 is arranged between one end of the case body 5 and the friction piece 1, and a backup spring 4 is arranged between the case cover 6 and the taper ring 3. The force is greater than the spring force of Koma Spring 2.
[0012]
FIG. 1 shows a state in which no external force is applied to the shaft 7, and the shaft 7 is locked to the shaft slide lock device 10. Since the resilient force f ₁ of the backup spring 4 is larger than the resilient force P ₁ of the piece spring 2, the taper ring 3 is pressed against the stopper portion 5 a by the backup spring 4, and the ring between the friction piece 1 and the case cover 6 There is a gap t between the portion 6a. Since the friction piece 1 is pushed by the piece spring 2, the friction piece 1 is inserted between the shaft 7 and the taper ring 3 so that there is always no gap between the taper surface 3 a of the taper ring 3 even if the component dimensions vary. is doing.
[0013]
In FIG. 1, since P ₁ <f _{1, the} taper ring 3 is pressed against the stopper portion 5 a of the case body 5. Then, the external force _{F 1} to the axis 7 is - smaller _{(f 1 P} 1) than the axis 7 keeps the locked state not move. When F ₁ is strengthened within a range not exceeding (f ₁ −P ₁ ), the shaft tends to move, but the friction piece 1 is caused to be tapered with the shaft 7 due to the friction between the shaft 7 and the friction piece 1. The shaft 7 is further tightened and locked by the action of the wedge.
[0014]
However, it can be moved with a small external force in the direction opposite to F ₁ . That is, when the shaft is moved in the direction opposite to F ₁ , the friction piece 1 tends to move together with the shaft 7, so that the force of the friction piece 1 tightening the shaft 7 is weakened by detaching from the tapered surface 3 a of the taper ring 3.
[0015]
FIG. 3 shows the unlocked state. When F ₁ becomes larger than (f ₁ −P ₁ ), the backup spring 4 bends, and the friction piece 1 and the taper ring 3 are integrally moved to the left as shown in FIG. When moving to the left, only the friction piece 1 hits the ring portion 6 a of the case cover 6. This state still also pushes the shaft in the F ₁ direction friction piece 1 is hampered movement by the ring portion 6a, not leaving said action of wedge like. Therefore, the shaft moves with a constant external force (an external force greater than f ₁ −P ₁ ).
[0016]
When the external force of F ₁ is removed, the friction piece 1 and the taper ring 3 are pushed rightward by the elastic force of the backup spring 4 to return to the state shown in FIG.
The operation is the same even if the external force is applied to the shaft slide lock device 10 without moving the shaft 7 by applying an external force.
Therefore, for example, when the present invention is applied to a shower at a bathhouse, the shaft 7 in FIGS. 1 and 3 is vertically oriented with the left side facing up, the upper and lower ends are fixed to the wall surface, and the fitting for fitting the shower is a shaft slide lock device. The shower can be held at a desired height by attaching it to 10 and sliding the position of this metal fitting up and down by hand.
[0017]
Compared with the structure of FIGS. 1 to 3, the structure of FIG. 4 eliminates the stopper portion 5a of the case body 5, and a ring cover 31b having a shaft passing through is fixed to one end of the taper ring 31. A piece spring 2 is disposed between the two. This eliminates the relationship that the elastic force of the backup spring 4 is greater than the elastic force of the piece spring 2.
[0018]
The piece spring 2 acts between the friction piece 1 and the ring cover 31 b and does not affect the backup spring 4.
Therefore, when the external force of F ₂ becomes larger than the elastic force of the backup spring 4 and is applied in the direction of the arrow, the friction piece 1 comes into contact with the ring portion 6a of the case cover 6 and the shaft 7 slides.
[0019]
In the above-described embodiment, each has the piece spring 2, but it is not always necessary when the shaft 7 is used in the vertical direction (vertical direction). That is, when the shaft 7 is used in the longitudinal direction (vertical direction) with the left side being downward in FIG. 1, the friction piece 1 can be moved downward by its own weight, and has the same effect as that of the above embodiment. Because you can.
[0020]
【The invention's effect】
As described above, according to the present invention described in detail, the following effects can be obtained.
(1) When releasing the locked state, it is possible to move the shaft or the shaft slide lock device by moving it by hand without the need to loosen the bolt as in the prior art.
[0021]
(2) The force to release the lock can be easily changed by changing the backup spring.
[0022]
(3) According to the invention of claim 3, since the friction piece is moved in one direction (downward) by its own weight, no piece spring is required, and the number of parts can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of claim 1 of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a longitudinal sectional view showing a state in which an external force is applied to a shaft from the state shown in FIG. 1 and a friction piece and a taper ring are moved. FIG.
FIG. 4 is a longitudinal sectional view showing an embodiment of claim 2 of the present invention.
FIG. 5 is a longitudinal sectional view of a conventional shaft slide lock device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 axis | shaft slide locking device 1 friction piece 1a hole 2 piece springs 3, 31 taper rings 3a, 31a taper surface 31b ring cover 4 backup spring 5 case main body 5a stopper part 6 case cover 6a ring part 7 shaft 8 case

Claims (3)

A case with a bottomed cylindrical case body and a case cover that is detachably attached to the opening thereof, and a case with a shaft passing through the center,
A taper ring that is inserted in this case so as to be slidable in the axial direction, has a tapered surface formed by a frustoconical space at the shaft center, and stops at a stopper portion on one end side in the case;
A friction piece that fits into the taper surface of this taper ring, projects a hole through which the shaft passes through the shaft center, and is divided into a plurality of pieces radially in the shaft center direction;
A piece spring disposed between one end inside of the case body and the friction piece;
A backup spring disposed between the inside of the case cover and the taper ring;
The case cover has a ring portion along the shaft hole that protrudes to a position where it contacts the friction piece at its moving end, and the elastic force of the backup spring is larger than the elastic force of the piece spring. Slide lock device. A case with a bottomed cylindrical case body and a case cover that is detachably attached to the opening thereof, and a case with a shaft passing through the center,
A taper ring that is inserted in this case so as to be axially slidable, has a tapered surface formed by a frustoconical space at the shaft center, and a ring cover through which the shaft passes is fixed to one end side;
A friction piece that fits into the taper surface of this taper ring, has a hole through which the shaft passes through the shaft center, and is divided into a plurality of pieces radially in the shaft center direction;
A piece spring disposed between the ring cover and the friction piece;
A backup spring disposed between the inside of the case cover and the taper ring;
The shaft cover lock device according to claim 1, wherein a ring portion along the shaft hole protrudes to a position where the case cover comes into contact with the friction piece at its moving end. A case with a bottomed cylindrical case body and a case cover that is detachably attached to the opening thereof, and a case with a shaft passing through the center,
A taper ring that is inserted in this case so as to be slidable in the axial direction, has a tapered surface formed by a frustoconical space at the shaft center, and stops at a stopper portion on one end side in the case;
A friction piece that fits into the taper surface of this taper ring, has a hole through which the shaft passes through the shaft center, and is divided into a plurality of pieces radially in the shaft center direction;
A backup spring disposed between the inside of the case cover and the taper ring;
The case cover protrudes to a position where the ring portion along the shaft hole comes into contact with the friction piece at its moving end ,
The shaft slide lock device , wherein the friction piece moves downward by its own weight in a state where the small diameter side of the truncated cone having the tapered surface is downward .

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