JP3278395B2 - Locking device for sliding rod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for a slide bar used as a device for vertically moving a slide bar supporting a pillow portion with respect to a backrest of a hairdressing chair. The present invention relates to a lock device for a slide rod, which can lock steplessly.

[0002]

2. Description of the Related Art Heretofore, as a locking method of a slide bar of a barber chair of this type, a plurality of recesses or locking holes are provided in a row on the slide bar, and the slide bar is slidably inserted. The above-mentioned dent or locking hole is engaged with the locking piece provided in the main body of the device, and the slide of the slide rod is locked.

[0003]

Therefore, the lock position of the slide rod can be stopped only at the position where the recess or the locking hole is provided, and the lock position requiring fine adjustment, that is, the lock position, , The sliding rod cannot be locked at any position, and in the barber / chair, it cannot be exactly adjusted to the height of the customer's head.
There has been a problem that some deviation occurs.

Further, a metal material is used for the slide rod and the lock member that slidably supports the slide rod, and when the slide rod slides, an unpleasant metal sound is generated when the metal rubs, and the friction between the metals causes friction. As a result, the wear was severe.

Further, since the urging force in the engaging direction is applied to the engaging piece that engages with the recess or the engaging hole of the sliding rod, the engaging piece is moved when the sliding rod is moved in the unlocking direction. Rubs the surface of the slide rod and dents or tries to engage the locking holes in the locking holes, which hinders smooth movement and causes uncomfortable noise.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has as its object to perform a smooth operation on a slide in a direction in which a slide rod is not locked, and to perform a slide operation in a lock direction. An object of the present invention is to provide a locking device for a slide rod that can be locked at an arbitrary position, that allows fine adjustment of the lock position, and that does not generate an unpleasant sound of metal rubbing.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a locking device for a sliding rod, which achieves the above-mentioned object, the means comprising a sliding rod which slides in a main body, and which is rotatable with respect to the main body. A release pin having a notch that is rotatably supported at its tip and that comes into contact with one surface of the slide rod, and that allows the lock pin to be moved in the slide permissible direction of the slide rod; The distance between the slide rod and the slide rod is increased in the slide allowance direction of the slide rod, and in the opposite direction, a shaft support plate having an inclined surface that presses the lock pin toward the slide rod, and biases the lock pin toward the slide rod. And a biasing member suspended from the release member.

It is preferable that an insertion portion is provided in the main body and slidably supports the slide rod, and the insertion portion is formed of a resin having low wear resistance and low friction coefficient.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings, in which the present invention is applied to a pillow portion of a barber / beauty chair. In the present embodiment, as shown in FIG.
The main body 2 of the lock device is attached with the slide rod 1 having the pillow portion b fixed to the top in the vertical direction.

The details will be described below with reference to FIGS.
The slide rod 1 is inserted through an insertion portion 3 formed of a resin having a low wear coefficient and a low friction coefficient such as polyacetal attached to the main body 2. A bent portion 21 is formed toward the side, and the slide rod 1 is inserted through an insertion hole formed in the bent portion 21. The support portion 31 made of the same material as the insertion portion 3 is inserted into the insertion hole. Is installed.

The friction between the material of the insertion portions 3 and 31 and the metal material such as iron or steel forming the slide rod 1 does not generate a sound of mutual rubbing, so that the slide of the slide rod 1 does not generate a rubbing sound. There is no discomfort due to the noise of the rubbing of the metal material, and the abrasion of the metal material is reduced.

The main body 2 has two support plates 4 from the rear side.
Is fixed in an upright state, and a release member 5 is supported by a support shaft 6 so as to be located between the shaft support plates 4. A notch 51 formed at the distal end of the release member 5 has a circular cross section. The lock pin 7 is fitted, and the lock pin 7 is in a state of contacting the slide rod 1 on a part of the peripheral surface.

The end surface of the shaft support plate 4 on the side of the slide rod 1 is inclined such that the distance from the slide rod 1 is wider on the bent portion 21 side than on the lock pin 7 and narrower on the opposite side. The lock pin 7 is formed on the surface 41, and is also located between the inclined surface 41 and the slide rod 1.

On the other hand, the end of the release member 5 opposite to the cutout portion 51 is provided on the rear side of the main body 2 with the hole 22 of the main body 2.
A lock pin 7 is provided between the release member 5 and the insertion portion 3 toward the side where the interval between the inclined surface 41 and the slide rod 1 is small. A biasing spring 8 is suspended.

Therefore, when moving the slide rod 1 upward in FIGS. 2 to 4, the operator rotates the release member 5 counterclockwise against the spring force of the spring 8. As a result, the lock pin 7 supported by the notch 51 of the release member 5 moves in a direction away from the slide rod 1 and also moves upward on the inclined surface 41 of the shaft support plate 4, as shown in FIG. It becomes the state of the line.

For this purpose, the lock pin 7 is connected to the slide rod 1.
The pillow b can be raised to an arbitrary height without causing resistance to the rise of the pillow. When the pillow portion b reaches the desired height position, when the pressing force on the release member 5 is released, the release member is rotated clockwise by the spring force of the spring 8, and the lock pin 7 goes down and the slope 4
1 and the sliding rod 1 are in a state where they bite into the narrow side, and the sliding of the sliding rod 1 is locked.

In this manner, the slide rod 1 can be freely slid and the lock can be performed at the free height of the slide, and the lock by the lock pin 7 can be performed at any position without any step. It can be used in a wide range as a mechanism that can lock at a free height position such as a pillow part b of a beauty chair and slide freely.

In the above-described embodiment, the case where the height of the pillow b of the barber / beauty chair is steplessly adjusted has been described, but the present invention is limited to this embodiment only. Rather, the present invention can be applied to any device that locks a slide rod at a desired position steplessly.

[0019]

As described above, according to the present invention, the lock pin accommodated in the cut portion of the release member is separated from the slide rod by rotating the release member against the spring force.
Further, at the time of locking, the lock pin can be securely fixed by the contact of the lock pin with the slide rod due to the return of the release member and the pressing force on the slide rod by the inclined surface of the pivot support plate. Can be.

Further, by using a resin having low wear resistance and a low coefficient of friction as a member for inserting the slide rod, it is possible to prevent the generation of unpleasant noise in which metals rub against each other and to reduce the friction so that the slide of the slide rod can be smoothly performed. In addition, there is little wear due to friction, so that the service life is prolonged.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view when the present invention is applied to a slide rod of a pillow portion in a backrest of a hairdressing chair.

FIG. 2 is a longitudinal sectional view of a main part of the present invention.

FIG. 3 is an enlarged vertical sectional view of a main part of the above.

FIG. 4 is a rear view of the same.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slide rod 2 Main body 3 Insertion part 4 Shaft support plate 41 Inclined surface 5 Release member 6 Support shaft 7 Lock pin 8 Spring

────────────────────────────────────────────────── ─── Continued on the front page (72) Susumu Sumida, Inventor 6-6 Ueno-cho, Kaga-shi, Ishikawa (56) References JP 8-915 (JP, B2) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A47C 1/04 A47C 7/36

Claims (2)

(57) [Claims] A sliding rod that slides inside the main body, a lock pin rotatably supported by the main body, and a lock pin that comes into contact with one surface of the slide rod at an end thereof; A release member having a notch that can be moved in the slide allowable direction; and a gap between the release rod provided in the main body and the slide rod increases in the slide allowable direction of the slide rod, and the lock pin moves to the slide rod side in the opposite direction. A locking device for a slide rod, comprising: a shaft support plate having an inclined surface to be pressed; and a biasing member suspended from a release member for biasing the lock pin toward the slide rod. 2. An insertion portion mounted in the main body and slidably supporting the slide rod, and the insertion portion is formed of a resin having low wear resistance and low friction coefficient. A lock device for a slide rod according to claim 1.