JPH07107344B2 - Sliding door cushion device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion device for a sliding door which prevents the door from running too far and colliding with the pillar at the front end of the sliding door when the sliding door is closed by its own weight to generate an impulsive sound.

[0002]

2. Description of the Related Art Sliding doors of this type are often supported in hospitals and the like by being supported by rails inclined in the closing direction via door rollers or suspension pulleys so that they can be closed by their own weight. In hospitals where quietness is required, doors must be connected to a speed reducer that keeps the closing speed low to prevent collision noise due to excessive running of the door. The configuration was complicated and expensive.
The present invention clarifies a sliding door cushion device that solves the above problems.

[0003]

A cushion device for a sliding door according to the present invention is a door (2) or an entrance frame which is automatically closed by gravity.
On top of (1), main cylinder device (3) and auxiliary cylinder device (4)
Coaxially and piston rod of auxiliary cylinder device (4)
(43) is provided so as to be able to contact and separate from the piston (32) of the main cylinder device (3), and both cylinder devices (3) and (4) are arranged along the opening and closing direction of the door. Piston rod (3
4) the rod shaft (35) is arranged to face the same axis, and the rod shaft (3
One end of 5) is fixed to the entrance / exit frame (1) or the door, and the other end is fitted into the piston rod (34) so as to be retractable. Auxiliary cylinder device
One of the piston rod (43) of (4) and the piston (32) of the main cylinder device (3) is made of a magnet, and the other is made of a material that can be attracted to the magnet. 3) and the end of the auxiliary cylinder device (4) on the side of the piston, the exhaust ports (5) (7) and the cylinders (31) (41) that throttle out the air in the cylinders (31) (41) to flow out. It has check valves (61) (81) that allow only the inflow of air into the inside.

[0004]

[Operation and effect] When the door (2) is fully opened, the main cylinder device (3)
Piston rod (34) of the main cylinder device (3) extends toward the piston (32) side of the main cylinder device (3) as well as the piston rod (43) of the auxiliary cylinder device (4). 6). When the door (2) is closed, the rod shaft (35) enters the piston rod (34) of the main cylinder device (3) (Fig. 5), and the piston rod (34) compresses the air in the cylinder (31). While being pushed into the cylinder (31) (Fig. 4). At this time, air exhaust resistance acts on the piston rod (34), and the door (1)
The closing speed of is weakened.

The piston (32) hits the piston rod (43) of the auxiliary cylinder device (4) and adsorbs it, and the piston rod (4)
3) while compressing the air in the cylinder (41),
When pushed in, the piston rod (34) of the main cylinder device (3) has the air discharge resistance of the main cylinder device (3) and the discharge resistance of the piston rod (43) of the auxiliary cylinder device (4). In operation, the closing speed of the door (2) is further reduced, and the door (2) hits the vertical frame (12) of the doorway frame (2) at a low speed.
No impact noise is produced between the door (23) and the door (1). Since the door (2) is decelerated on the way of closing and is further decelerated immediately before closing, that is, it is decelerated in two steps, so that the closing time is shortened as compared with the case of closing at a low speed from the beginning to the end.

When the door (2) is opened, the piston rod (34) of the main cylinder device (3) projects from the cylinder (31) while expanding, and the piston (32) and the auxiliary cylinder device of the main cylinder device (3). Since the piston rod (43) of (4) is adsorbed, the piston rod (43) of the auxiliary cylinder device (4) is moved to the cylinder by the forward movement of the piston (32) of the main cylinder device (3).
Drawn from (41). When the piston rod (43) protrudes to the maximum, the piston rod (43) and the main cylinder device
The piston (32) of (3) separates, the piston rod (43) is kept in the original state protruding from the cylinder (41), and waits for the next closing operation of the door (1).

[0007]

EXAMPLE As shown in FIG. 1, the doorway frame (1) of the door (2) is
The frame (1) is formed by the upper frame (11) and the vertical frames (12) and (13).
Half of the inside is the entrance opening (14). Doorway frame (1)
A rail (15) having a slightly lower closed side is provided on the upper part of the rail, and a door (2) is slidably suspended on the rail (15) via pulleys (16) and (16). Door (2) suspension member (17) (1
A cushion device (9) is provided so as to straddle between the doorway frame (1) and the closing side vertical frame (12).

The cushion device (9) is provided with the main cylinder device (3) and the auxiliary cylinder device (4) coaxially along the opening and closing direction of the door (2) and in parallel with the rail (15), and both cylinders are installed. The devices (3) and (4) are fixed on the suspension members (17) and (17), and the tip of the piston rod (34) of the main cylinder device (3) is fixed to the vertical frame (12). In the following description of the cylinder devices (3) and (4), the tip end is the protruding side of the piston rods (34) and (43), and the base end is the retracting side of the piston rods (34) and (43).

(First Embodiment) In the embodiment, the main cylinder device is used.
The auxiliary cylinder device (4) is built in the cylinder (31) of (3). The piston rod (34) of the main cylinder device (3) is a cylinder shaft, and protrudes from the end surface of the piston (32),
(35) is inserted into the tip opening of the piston rod (34) so as to be retractable, and a flange (36) is projectingly provided at the tip of the rod shaft (35), and a screw is attached to the vertical frame (12) of the inlet / outlet frame (1). It is fixed and fixed.

The rod shaft (35) and the piston rod (34) are
An engagement / disengagement mechanism (39) for engaging / disengaging each other is provided. Engagement mechanism (3
9) is a projection (35a) protruding from the rod shaft (35) close to the flange (36), and a notch (38) opened at the tip of the piston rod (34) to engage and disengage the projection (35a). Is formed by. The notch (38) extends obliquely from the tip of the piston rod (34) obliquely in the circumferential direction. An inclined portion (38a) that faces toward is formed.

A guide groove (37) is formed on the piston rod (34) from the notch (38) to the piston (32) side, and the guide groove (37) is formed.
Consists of a linear groove portion (37a) extending straight in the axial direction from the notch (38) to the vicinity of the piston (32), and a spiral groove portion (37b) continuous with the linear groove portion (37a) and close to the piston (32). . On the inner surface of the tip of the cylinder (31), a rotation regulating shaft (39) slidably fitted in the guide groove (37) is provided so as to protrude inward.

When the projection (35a) of the rod shaft (35) is engaged with the groove (38b) of the piston rod (34) and the rod shaft (35) and the piston rod (34) are integrated, the rotation restricting shaft (39 ) Fits into the linear groove (37a) of the guide groove (37),
Prevent rotation of (34). When the door is opened, the piston rod (34) protrudes from the cylinder (31) and the rotation control shaft (39) enters the spiral groove (37b) of the guide groove (37), so the piston rod (34) is forced to rotate. The piston rod (34) notch (3
The projection (35a) of the rod shaft (35) comes out of the rod 8) and the engagement between the piston rod (34) and the rod shaft (35) is released.

At the center of the base end of the cylinder (31) of the main cylinder device (3), the auxiliary cylinder device (4) is directed toward the inside of the cylinder (31).
Will be deployed. Piston rod of auxiliary cylinder device (4)
(43) projects toward the piston (32) of the main cylinder device (3), and the tip of the piston rod (43) is formed by a magnet (44).

Main cylinder device (3) and auxiliary cylinder device
Each of the base walls of (4) has an exhaust port (5) (7) and an intake port.
(6) (8) is opened, and the flow control valve (5
The check valves (61) and (81) are provided at the intake ports (6) and (8). The check valves (61) (81) allow only the inflow of air into the cylinders (31) (41) and prevent the outflow of the air. Each cylinder device
(3) (4) cylinder (31) (41) at the tip of the piston (32)
A large air flow gap (30) (40) is formed between the piston rods (34) and (43) so that the compression resistance of the air does not act when the (42) slides to the protruding side. ing.

However, when the door (2) is fully closed, the piston rods (34) and (43) of the cylinder devices (3) and (4) are retracted to the maximum, and the piston rods of the main cylinder device (3) ( 34) and the rod shaft (35) are nested and the rod shaft (35) projection (35
a) engages the notch (38) in the piston rod (34). The piston rod (43) of the auxiliary cylinder device (4) and the piston (32) of the main cylinder device (3) are attracted (Fig. 3).

When the door (2) begins to open, the main cylinder device
The auxiliary cylinder device (4) in which the piston rod (34) of (3) is pulled out and is adsorbed to the piston rod (34) at this time.
The piston rod (43) is also pulled out (Fig. 4). When the piston rod (43) of the auxiliary cylinder device (4) is maximally projected, the piston rod (43) and the piston (32) of the main cylinder device (3) are separated from each other, and the piston rod (of the main cylinder device (3) ( 34) is independently pulled out from the cylinder (31).

Before the piston (32) reaches the forward end, the rotation restricting shaft (39) at the tip of the cylinder (31) enters the spiral groove (37b) of the piston rod (34), and the piston rod (34) Is rotated so that the protrusion (35a) comes off the notch (38) (FIG. 5). When the door (2) further moves in the opening direction, the rod shaft (35) is pulled out from the piston rod (34) (Fig. 6).

When the hand is released from the fully opened door (2), the door (2)
Slides in the closing direction due to its own weight (first speed).
The rod shaft (35) penetrates into the piston rod (34) of the main cylinder device (3), and the projection (35a) of the rod shaft (35) is cut out (38).
When the piston rod (34) is pressed against the inclined part (38a) of the cylinder (31) and rotated, the projection (35a) is fitted in the groove (38b), and the rotation restricting shaft ( 39) fits from the spiral groove portion (37b) of the piston rod (34) to the linear groove portion (37a).

Piston rod (34) of the main cylinder device (3)
Is pushed into the cylinder (31) (FIG. 4), and at this time, the air in the cylinder (31) is throttled and discharged by the flow rate adjusting valve (51) of the exhaust port (5), so that the piston rod (34 ) Is affected by the air discharge resistance. Therefore, even if the door (1) runs too far in the closing direction, the moving speed of the door is weakened from the moment the piston rod (34) is pushed into the cylinder (31), and becomes low speed (second speed).

As shown in FIG. 4, when the piston (32) hits the piston rod (43) of the auxiliary cylinder device (4), both are adsorbed and the auxiliary cylinder device (4) is pushed into the cylinder (31). Be done. At this time, the air in the cylinder (41) is exhausted from the exhaust port (7).
Since it is throttled by the flow rate control valve (71) and discharged, air discharge resistance acts on the piston rod (43).

That is, in addition to the air compression resistance acting on the piston rod (34), the piston rod (34) of the main cylinder device (3) has a piston rod of the auxiliary cylinder device (4).
Since the compression resistance of (43) is added, the closing speed of the door (2) is further reduced, and the vertical speed of the vertical frame (12) of the doorway frame (1) is low (third speed).
Since it hits, no impact sound is emitted.

(Second Embodiment) FIG. 7 shows a main cylinder device (3).
3 shows another embodiment of the piston rod (34) of FIG. Just by slidingly fitting the rod shaft (35) to the piston rod (34), the piston rod (34) is
There is no mechanism for engaging and disengaging the rod shaft (35). In this case, when the door (2) opens, the piston of the main cylinder device (3)
The rod shaft (35) may be pulled out from the piston rod (34) before the (32) and the piston rod (34) are pulled out from the cylinder (31). No problem. When the door (2) is closed, the effect of decelerating in two steps and preventing an impact is similar to that of the embodiment of FIG.

In carrying out the present invention, the flow rate adjusting valves (51) (71)
Instead of, just make the exhaust ports (5) (7) smaller,
Although the above effects can be obtained, like the embodiment, the exhaust ports (5) (7)
By providing the flow rate adjusting valves (51) and (71) in the, it is possible to optimally adjust the throttle amount of the flow paths of the exhaust ports (5) and (7) according to the weight of the door (1) and the like.

In carrying out the present invention, the main cylinder device (3)
Auxiliary cylinder device (4) is provided outside the cylinder (31) of the same as the main cylinder device (3) coaxially with the auxiliary cylinder device (4).
The piston rod (43) of the main cylinder device (3) slidably and airtightly penetrates to the base end wall of the main cylinder device (3).
Even if the piston (32) of (3) is disposed so as to be able to contact the piston (32), the same effect as described above can be obtained.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or limiting the scope. The configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of a sliding door.

FIG. 2 is a sectional view of the cushion device according to the first embodiment.

FIG. 3 is a sectional view of the cushion device when the door is fully closed.

FIG. 4 is a cross-sectional view of the cushion device with the piston rod of the auxiliary cylinder device pulled out.

FIG. 5 is a cross-sectional view of the cushion device in a state where a cylinder shaft of the main cylinder device is pulled out to the maximum.

FIG. 6 is a sectional view of the cushion device when the door is fully open.

FIG. 7 is a sectional view of a cushion device according to a second embodiment.

[Explanation of symbols]

 (1) Doorway frame (12) Vertical frame (2) Door (3) Main cylinder device (4) Auxiliary cylinder device (5) Exhaust port (7) Exhaust port (6) Suction port (8) Suction port

Claims (1)

[Claims] 1. A main cylinder device (3) and an auxiliary cylinder device (4) are coaxially arranged on a door (2) or an entrance frame (1) which is automatically closed by gravity, and a piston of the auxiliary cylinder device (4). The rod (43) is provided so as to be able to come into contact with and separate from the piston (32) of the main cylinder device (3), and both cylinder devices (3) and (4) are arranged along the opening and closing direction of the door. ), The rod shaft (35) is arranged coaxially with the piston rod (34), one end of the rod shaft (35) is fixed to the doorway frame (1) or the door, and the other end is connected to the piston rod (34). Fits so that it can appear and disappear. Piston rod (43) of auxiliary cylinder device (4) and main cylinder device
One of the pistons (32) of (3) is made of a magnet, and the other is made of a material that can be attracted to the magnet.
At the piston-side ends of the main cylinder device (3) and the auxiliary cylinder device (4), exhaust ports (5) (7) and a cylinder ( 31) A cushion device for a sliding door provided with check valves (61) (81) that only allow air to flow into the (41).