JPH0446599Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is a hairdressing shampoo in which a back plate and a footrest are raised and lowered in conjunction with the raising and lowering of a parallel link drive mechanism that raises and lowers a seat board. It's about chairs.

[Conventional technology]

A shampoo chair in which a back plate and a footrest are interlocked with a parallel link drive mechanism that raises and lowers the seat plate so that the customer can sit in a supine position is disclosed, for example, in Japanese Patent Publication No. 55364/1983. It is conventionally known.

As shown in FIG. 9, a conventionally known shampoo chair of this type has a back plate mounting bracket 4 rotatably attached to an armrest member 2 fixed to the rear of the seat plate 1 via a bracket 3. A footrest 5 is rotatably attached to the front part. A main link 8 is installed between the bracket 6 fixed to the rear lower surface of the seat plate 1 and the base 7.
and a sub link 9 constitute a parallel link mechanism,
A plunger 11 of a cylinder 10 rotatably mounted on a base 7 is rotatably connected to a main link 8.

Further, an upright piece 13 is provided at the end of the sub link 9 on the bracket 6 side, which is bent at a right angle toward the main link 8 side.
The upright piece 13 and the lower part of the bracket 3 are connected by a back plate interlocking link 14, and the above mentioned upright piece 13 and the middle of the footrest 5 are also connected by a footrest interlocking link 15.

In the shampoo chair described above, when the plunger 11 contracts from the supine state as shown in the figure, the seat plate 1 descends, and in conjunction with this, the back plate mounting bracket 4 stands up, and the footrest 5 hangs downward. Becomes a sitting state. Conversely, when the plunger 11 extends from the sitting position, the seat plate 1 rises, and in conjunction with this, the back plate mounting bracket 4 falls down and the footrest 5 is lifted, resulting in a supine position.

[The problem that the idea aims to solve]

In the conventional shampoo chair as mentioned above,
In the supine state, the customer's elbows are separated from the armrest member 2 and are on the back plate 12, so the elbows may get caught between the back plate 12 and the armrest member 2 when the customer stands up the back plate 12 and changes to a sitting position. .

This problem occurs because the armrest member 2 is fixed to the seat plate 1, and the height of the elbow changes depending on the position of the elbow in the seated state and the position in the supine state. The reason is that it doesn't change.

Therefore, the first purpose of this invention is to change the height of the armrest member in conjunction with the elevation and descent of the seat plate.

Furthermore, in the past, a footrest interlocking link 15 was used to link the raising and lowering of the seat plate 1 with the footrest 5;
A second purpose is to reduce the number of parts by making the armrest member 5 also serve as the armrest member 2.

[Means to solve the problem]

The first means to solve the above problem is to rotatably attach a back plate mounting bracket to the rear end of the seat plate and a footrest to the front end of the seat plate, and use a parallel link drive mechanism to drive the seat plate. Maintaining a horizontal state and moving vertically in parallel, interlocking the parallel link drive mechanism and the back plate mounting bracket via the back plate interlocking link,
Similarly, in a hairdressing shampoo chair in which the parallel link drive mechanism and the footrest are linked via the footrest interlocking link, the lower end of the L-shaped back plate is rotatably attached to the seat plate, and the parallel link drive mechanism is connected to the footrest via the footrest link. An upright piece is attached at a certain angle to one of the links, a back plate interlocking link is provided between the upright piece and the L-shaped bent part of the back plate mounting bracket, and the L-shaped bent part and the footrest are connected to each other. A footrest interlocking link that also serves as an armrest member is provided between the two.

Further, the second means is such that the angle of the upright piece with respect to one of the parallel links can be adjusted.

[Effect]

In the seated state, when the parallel link drive mechanism is driven to raise the seat plate while keeping it horizontal, the back plate is pulled by the back plate interlocking link and falls backward. As the back plate falls backward, the footrest is pulled up by the footrest interlocking link. At the same time, the rear end portion of the footrest interlocking link descends to the position of the elbow in the supine state.

In the case of the second means, the inclination angle of the back plate can be changed by appropriately changing the mounting angle of the upright piece.

〔Example〕

As shown in FIGS. 1 and 2, the hairdressing shampoo chair of the embodiment has support pieces 22 projecting upward on both sides of the rear end of a seat plate 21, and a shaft 23 attached to the support pieces 22. The tip of a shaped back plate mounting bracket 24 is rotatably attached. Also, brackets 25 are provided on both sides of the rear end of the seat plate 21 to project downward.

The base 26 has two support plates 28 fixed in parallel to the upper surface of the base 27. A hydraulic pump 29 is fixed on the base 27, and the lower end of the hydraulic cylinder 31 is supported by a shaft 30 in the front-rear direction (the first It can be mounted so that it can rotate freely in the left and right directions (as shown in the figure).

The support plate 28 has two parallel upper and lower shafts 3.
2 and 33, a main link 34 and a sub link 35 having the same length are rotatably supported. Also each link 3
The other ends of 4 and 35 are rotatably supported by two upper and lower shafts 36 and 37 parallel to the bracket 25 mentioned above. The plunger 38 of the cylinder 31 is connected to the middle of the main link 34 by a shaft 39, and the main link 34, the sub link 35, and the cylinder 31 constitute a parallel link drive mechanism.

As shown in FIG. 2, the above-mentioned main link 34 has a U-shaped cross section as a whole, and a portion of the front end thereof through which the plunger 38 passes is open. The sub link 35 is a rectangular frame-shaped base surrounding the cylinder 31, and a rod is integrally connected to the tip of the base. Upright pieces 40 are fixed at a constant angle α to both ends of a shaft 37 that connects the tip of the rod of the sub link 35 to the bracket 25.

A pin 41 is integrally fixed to the L-shaped bent portion of the back plate mounting bracket 24, and a back plate interlocking link 42 is interposed between the pin 41 and the upright piece 40, and both ends thereof are connected to a shaft 43, They are rotatably connected by 44.

On the other hand, support pieces 45 are provided on both sides of the front end of the seat plate 21.
is provided to protrude upward, and a diamond-shaped connecting plate 47 is rotatably attached to the supporting piece 45 by a shaft 46.
A footrest 48 is fixed to the connecting plate 47.
The footrest 48 is mounted so as to take a vertically downward angle when the seat plate 21 is at its lowest position, that is, in the seated position, as shown in FIG.

Further, one end of the footrest interlocking link 49 is rotatably attached to a pin 41 provided on the L-shaped bent portion of the back plate mounting bracket 24, and the other end is rotatably attached to the middle of the above-mentioned connecting plate 47. It will be done. The footrest interlocking link 49 has an arched shape rising on both sides of the seat plate 21, has a front sloped part 50 that falls forward, and a rear sloped part 51 that slopes back, and also serves as an armrest.

Note that cushions 52 and 53 (see FIG. 5) are attached to the seat plate 21 and footrest 48, respectively, and a back plate 54 is attached to the back plate mounting bracket 24. In the seated state shown in FIG. 5, the footrest link 49 doubles as an armrest for the customer's lower arm.
It rests on the front inclined part 50 of.

When the cylinder 31 is driven from the seated state, the third
As shown in the Figures and FIG. 4, plunger 38 pushes up main link 34 and rotates it clockwise. As the main link 34 rotates, the sub link 35 also rotates while maintaining a parallel state. The rotation of the main link 34 and the sub link 35 causes the seat plate 21 to rise while maintaining its horizontal state.

At the position where the sub link 35 has rotated by an angle θ, the locus of the shaft 37 and the shaft 44 as shown in FIG.
Draw ₁ and ₂ , and add sublink 3 on the trajectory ₁ and ₂ .
The position of the axis 37 at the angle θ of 5 is the point A, and the axis 44
Set the position of the shaft 23 of the support piece 22 at point C, the position of the pin 41 of the L-shaped bent part of the back plate mounting bracket 24 at point D, and set the shaft 33, which is the center of rotation of the sub link 35, at point B. Assuming point O, ∠OAB (=α) is constant, and ∠OAC (=β) increases as θ increases. As a result, ∠CAB gradually increases,
That is, the point D is pulled by the back plate interlocking link 42 and moves on a trajectory ₃ centered on the point C. Therefore,
The back plate mounting bracket 24 falls backward by a predetermined angle.

In addition, by moving the D point, the footrest interlocking link 4
The rear end of 9 descends, and as the front end lifts up the connecting plate 47, the connecting plate 47 rotates around the shaft 46 and rises, bringing the footrest 48 integrated therewith into a nearly horizontal state. (See Figures 4 and 6).

Therefore, the customer is in a supine state, and the nape of the customer's neck is in contact with the front edge of the shampoo bowl 55. In addition, the customer's elbow is connected to the rear inclined portion 5 of the footrest interlocking link 49.
Move to 1.

When rising from the supine position to the seated position, the seat plate 21 gradually lowers due to the opposite effect to the above case, and in conjunction with this, the back plate mounting bracket 24 stands up, and the footrest 48 moves downward. Drops down. At this time,
The position where the customer's elbow comes into contact moves from the rear inclined part 51 to the front inclined part 50.

In the above embodiment, the angle of the upright piece 40 with respect to the sub link 35 is fixed at a constant angle α;
Since this angle α determines the inclination angle of the back plate 54, it is preferable that it can be adjusted as appropriate depending on the installation height of the shampoo bowl 55. In order to meet such demands, as shown in FIGS. 7 and 8, it is necessary to form serrations 56 at both ends of the shaft 37 and to form serration holes 57 in the upright piece 40 to fit therewith. Accordingly, the angle α of the upright piece 40 with respect to the sub-link 35 can be changed as appropriate.

In addition, in FIGS. 7 and 8, 58 is a spacer, and 59 is a retaining clip.

[Effect of idea]

As described above, in this invention, the footrest interlocking link, which also serves as an armrest, is lowered in the supine state, so the customer's elbow can be placed on the link. Therefore, when raising the customer from a supine position to a seated position, it is possible to eliminate the problem of the customer's elbow being pinched. Furthermore, by using both the armrest and the footrest interlocking link, there is an advantage that the number of parts can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a side view of the embodiment with the cushion part removed, Fig. 2 is a partially omitted perspective view of the same as above, and Fig. 3 is a partially omitted perspective view of the embodiment.
The figure shows a side view during the transition from a sitting position to a supine position.
Fig. 4 is a side view of the supine state; Fig. 5 is a side view of the seated state during use; Fig. 6 is a side view of the supine state during use; Fig. 7 is an exploded perspective view showing a part of another embodiment. 8 is a sectional view of the assembled state shown in FIG. 7, and FIG. 9 is a side view of the conventional example. 21...Seat plate, 22...Support piece, 23...Shaft,
24... Back plate mounting bracket, 25... Bracket, 2
6...Base, 27...Base, 28...Support plate, 2
9...Hydraulic pump, 30...Shaft, 31...Hydraulic cylinder, 32, 33...Shaft, 34...Main link, 35...Sublink, 36, 37...Shaft, 38
... Plunger, 39 ... Shaft, 40 ... Standing piece,
41... Pin, 42... Back plate interlocking link, 43,
44...Shaft, 45...Support piece, 46...Shaft, 47
... Connecting plate, 48 ... Footrest, 49 ... Footrest interlocking link, 50 ... Front sloped part, 51 ... Backward slope, 52, 53 ... Cushion, 54 ...
Back plate, 55... shampoo bowl, 56... serration, 57... serration hole, 58... spacer, 59... clip.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A back plate mounting bracket is rotatably attached to the rear end of the seat plate and a footrest is rotatably attached to the front end of the seat plate, and the above seat plate is held in a horizontal state by a parallel link drive mechanism. The parallel link drive mechanism and the back plate mounting bracket are interlocked via the back plate interlocking link, and the parallel link drive mechanism and the footrest are also connected via the footrest interlocking link. In a hairdressing shampoo chair designed to be interlocked, the lower end of the L-shaped back plate is rotatably attached to the seat plate, and an upright piece is attached at a certain angle to one link of the parallel links, and the upright piece and A back plate interlocking link is provided between the L-shaped bent portion of the back plate mounting bracket, and a footrest interlocking link that also serves as an armrest member is provided between the L-shaped bent portion and the footrest. Shampoo chair for hairdressing. (2) The hairdressing shampoo chair according to claim (1), wherein the angle of the upright piece with respect to one of the parallel links is adjustable.