JP2001333946A - Safety device for roll up apron - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with a roll up apron to prevent a patient's foot from sandwiching between the roll up part and the floor when the apron is rising. SOLUTION: The roll up part 5 which can protrude from and be tucked away into the apron freely is made to be able to slide for the apron 2 at least when it is tucked away. The detector 13 which detects that a burden is imposed on the roll up part for a direction of the apron and the roll up slides, at least prevents the chair including the apron from falling down further when the roll up part is tucked away.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental chair or a hairdresser's chair. A roll-up droop that supports even the tip of the foot, and a roll-up droop that prevents the subject's foot from being pinched between the front end of the roll-up and the floor when the droop is in an upright state. Related to safety devices.

[0002]

2. Description of the Related Art In recent years, a treatment chair in a dental clinic in which a patient (patient) is placed in a supine position for treatment is provided with a roll in order to support the entire leg of the subject and provide a comfortable supine position. Up front sagging (a supine state, ie, when the front sagging is in a horizontal state, the roll-up portion that is a part of the front sagging extends toward the tip) has been developed.

[0003]

In such a roll-up sag, if the sag is set up when the treatment is completed, the roll-up portion is housed in the sag, but the aforesaid state is reached. Sometimes the practitioner's feet are pinched between the roll-up part and the floor. Also,
There has been a problem that the mother's feet are pinched when the mother stands in front of the chair in an attempt to hold the child who is to be treated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a roll-up device in which a toe is sandwiched between a tip of a roll-up and a floor surface at the time of standing up. When a load is applied to the tip of the up section,
It is an object of the present invention to provide a roll-up sagging safety device in which a safety switch is operated to prevent the sagging of the sagging at least further in the standing state.

[0005]

SUMMARY OF THE INVENTION The roll-up safety device according to the present invention achieves the above-mentioned object. The safety device includes at least a roll-up portion that projects and can be stored freely. When the roll-up portion is configured to be slidable in the storage direction at the time when the roll-up portion is stored, a detection unit that detects that a load is applied to the roll-up portion and slides in the storage direction is operated. The chair is prevented from lowering further including at least the sag.

[0006] It is preferable that the chair including a forward slant is driven in an ascending direction when the detecting means detects the load.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a safety device for a roll-up hang-down device according to the present invention.
Although this embodiment is directed to a dental chair, it is needless to say that the present invention can also be applied to a barber / beauty chair.

[0008] Reference numeral 1 denotes a seat, and 2 is a front hanger attached to the tip of the seat 1 so as to be able to rise and fall. The tip of the seat 1 is capable of standing up and down. 3 is the seat 1
The backrest 4, which is attached to the rear end so as to be able to move up and down, is a vertical movement mechanism to which the seat portion 1 is vertically attached and rotatably attached.

The seat 1 has seat substrates 1a and 1b rotatably mounted substantially at the center in the front-rear direction. The seat 1 is located at a pivotal connection point between the seat substrates 1a and 1b.
The side becomes horizontal (when the front hanging 2 is in the upright state) with the undulation of the front hanging 2, and the front becomes slightly inclined (when the front hanging 2 is in the horizontal state).

A front hanging substrate 2a is mounted on the back surface of the front hanging 2 and a roll-up substrate 5a of a roll-up section 5 is slidably mounted on the front hanging substrate 2a. A hydraulic cylinder 6 is mounted and a spring 7 is stretched between a rear seat side of the front hanging board 2a and a rear end of the seat board 1b. Therefore, when high-pressure oil is supplied into the hydraulic cylinder 6, the front hanging substrate 2a
Is displaced in the horizontal direction against the spring force of the spring 7, and when the supply of the oil is stopped, the piston of the hydraulic cylinder 6 is retracted by the spring force of the spring 7 and stands up.

Numeral 8 is a pantograph-shaped (commonly called "magic hand") expansion / contraction member that forms a deformable triple parallelogram, and a second pivot point 8a is pivotally supported on the back surface of the front hanging substrate. A pivot point 8b at the tip is pivotally supported on the back surface of the roll-up substrate 5a. Reference numeral 9 denotes a spring stretched between the left and right ends of the front hanging substrate 2a and the roll-up substrate 5a.

Reference numeral 10 denotes a chain having one end attached to the back surface of the seat substrate 1b, and the other end attached to a pivot point 8c at the upper end of the contracting member 8. 11 is the seat 1
The chain 10 is rotated by a gear rotatably attached to the upper end of the front hanging board 2a which is a bent portion of the front hanging 2
Are engaged with each other. Reference numeral 12 denotes a slack preventing member for preventing the chain 9 from being loosened, and is always urged against the gear 11 by a spring.

Reference numeral 13 denotes a detecting means such as a microswitch mounted on the lower end of the roll-up board 5a. Reference numeral 14 denotes an operating rod for operating an operating piece 13a of the detecting means. The operating rod 14 is always operated by a spring 14a. The rod 14 is configured not to push up the operation piece 13a. Fifteen
Is a pressing plate attached to the lower end of the front hanging board 2a, and is attached at a position facing the operating rod 14.

Next, the operation will be described based on the above configuration. 1 and 2 show the hydraulic cylinder 6 in a discharge state,
The front hanging 2 is in a horizontal state. In this state, the chain 10 is pulled leftward against the spring force of the spring 9 in FIG.

When the chain 10 moves to the left, the fulcrum 8 of the telescopic member 8 to which the tip of the chain 10 is attached is attached.
Since b is pulled (moved upward) as shown in FIG. 2, the elastic member 8 is extended. As a result, the roll-up substrate 5a extends forward and projects forward in the horizontal direction of the front hanging portion 2. Therefore, even the toe of the subject is supported and the patient is in a comfortable state.

When the treatment such as treatment is completed and the auto return switch is pressed, the solenoid valve on the oil discharge side is opened and the oil in the hydraulic cylinder 6 can be discharged. When the piston enters the cylinder, the forward slant 2 is displaced in the upright direction.

When the hang 2 is displaced in the upright direction, the pulling force of the chain 10 is released and the fulcrum 8
There is no pulling force on b. Therefore, the elastic member 8 is deformed in the contracting direction by the spring force of the spring 9,
The roll-up substrate 5a is housed on the back surface of the front hanging 2, and is in the state shown in FIGS. When the front hanging 2 is completely upright, the operating rod 14 is pressed by the pressing plate 15.
, And does not push up the detecting means 13 against the spring force of the spring 14a.

Before the front hanging 2 completely stands up, if the toe of the user is caught between the lower end of the roll-up portion 5 and the floor surface, Since a load due to being sandwiched is applied, the roll-up substrate 5a is pushed up. When the roll-up board 5a is pushed up, the operating rod 14 advances toward the pressing plate 15 fixed to the front hanging board 2a. If the load is larger than the spring force of the spring 14a, the operating rod 14 is detected. The means 13 is pushed up.

When the detecting means 13 is turned on, the lowering operation of the chair, which continues to lower, is stopped, or the raising / lowering mechanism 4 operates again to move the chair in the upward direction. Therefore, even if the foot is pinched, no further standing is performed, and even if the foot is pinched, no serious injury is caused.

Although the detection means 13 in the above-described embodiment uses a microswitch, the load may be detected using a potentiometer or a strain gauge.

[0021]

As described above, according to the present invention, the roll-up portion, which protrudes and can be housed with respect to the sag, is configured to be slidable in the accommodating direction with the sag at least at the time of housing. Since the detecting means for detecting that a load is applied to the roll-up portion in the storing direction and slid during the storing operation is operated, so that at least the further drooping of the sagging is prevented from being performed, Even if the subject is caught between the roll-up part and the floor surface, the drooping is prevented from immediately displacing in the upright direction, so that it has the effect of not causing injury. It is.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view of a safety device for roll-up sagging according to the present invention in which the sagging is horizontal.

FIG. 2 is a rear view of the front sag and the roll-up unit.

FIG. 3 is a partial cross-sectional side view in which a front sag is in an upright state.

FIG. 4 is a rear view of the front sag and the roll-up unit.

FIG. 5 is a partially enlarged sectional view of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat part 2 Hanging forward 5 Roll-up part 13 Detecting means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B084 JA09 3B099 EA04 EA12 4C341 MM11 MN09 MP07 MQ02 MR14 MR17

Claims (2)

[Claims] 1. A roll-up portion which projects and can be housed freely with respect to a hang-down, is configured to be slidable in a storage direction between the hang-up portion and the hang-up portion at least when the roll-up portion is housed. Detecting means for detecting that a load has been applied to the storage direction and sliding has been operated, so that the chair including at least the above-mentioned sagging is prevented from being further lowered. . 2. The roll-up safety device according to claim 1, wherein when the detection means detects the load, the chair including the safety device is driven in the ascending direction.