JPS603253Y2 - Revolving door with shock absorber - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a revolving door with a shock absorbing device, which is used particularly for a revolving door at an entrance/exit.

Normally, one side of the revolving door at the entrance/exit is attached facing the outdoors, which often causes trouble in opening and closing the door, especially in times of strong winds.

If strong winds are applied to several houses during the opening/closing operation of these revolving doors, the opening/closing speed of several houses will increase due to the wind pressure, and as a result, some of the houses will come into contact with building members such as the door frame, causing the door glass to close. This may result in damage such as, or an unexpected accident to the human body.

In view of the above-mentioned points, the present invention allows normal door opening/closing operations to be performed smoothly without causing inconveniences such as large force being required for opening/closing or unevenness, and to prevent strong winds from acting on several doors when opening/closing the door. In some cases, revolving doors with shock absorbers reduce the opening and closing speed of several doors and prevent them from impacting against the door frame, thereby preventing damage to the door glass and, in turn, danger to human health.More details A hydraulic chamber is formed within the hydraulic cylinder by fixing a helad cover to one end of the hydraulic cylinder and a rod cover to the other end, and the hydraulic chamber is filled with liquid. The piston rod is arranged such that its ends protrude from both force bars, and the fixed piston piece is disposed on the piston rod and has a truncated conical surface on its outer circumferential surface, and a cylindrical body with a bottom has a through hole in its bottom. , a movable piston piece having a cylindrical surface portion communicating with the through hole on its inner circumferential surface, and a truncated conical surface portion communicating with the cylindrical surface portion and engaging with the outer circumferential truncated conical surface portion of the fixed piston piece;
A shock absorber is constructed by disposing a coil spring located between the piston pieces and holding the piston pieces at a predetermined distance. To provide a rotating door with a shock absorbing device, in which a piston rod protruding from the rod cover side is rotatably attached to a mounting bracket fixed to a door upper stile beyond the door rotation axis.

Embodiments of the present invention will be described in detail below with reference to the drawings.

A is a revolving door at the entrance and exit, and the revolving door is a flow hinge door that rotates around a pivot axis l.

A is the upper stile of the revolving door A, b is the upper frame of the door frame that accommodates and supports the revolving door A, and B is a shock absorber.

Reference numeral 1 denotes a hydraulic cylinder constituting the shock absorber B.

2 is a head cover screwed and fixed to one end of the hydraulic cylinder 1, and the head cover 2 has a central through hole 2 in its center.
1 is formed.

Furthermore, an engagement hole 22 having a threaded portion from its outer circumferential surface is formed in the helad cover 2 at a position perpendicular to the central through-hole 21 .

A rod cover 3 is screwed and fixed to the other end of the hydraulic cylinder 1 to which the helad cover 2 is fixed, and the rod cover 3 has a central through hole 31 formed in its center.

Then, a head cover 2 and a rod cover 3 are fixed to the hydraulic cylinder 1, and a hydraulic chamber R is formed within the hydraulic cylinder 1,
The hydraulic chamber R is filled with liquid (oil) O.

4 is a piston rod, and the piston rod 4 is inserted through the central through hole 21.31 of the hydraulic cylinder 1, the head cover 2 fixed to the hydraulic cylinder 1, and the rod cover 3, and its both ends are connected to the cover 2.31, respectively. It is arranged to protrude from 3.

A reduced diameter portion 41 whose diameter is reduced is formed at the tip end of the piston rod 4 on the rod cover side, and a threaded portion 42 is formed on the outer peripheral surface of the reduced diameter portion 41.

(See FIG. 9) 5 is located in the hydraulic chamber R of the hydraulic cylinder 1,
This is a piston disposed on the piston rod 4, and the piston 5 divides the hydraulic pressure chamber R into hydraulic pressure chambers R1 and R2.

The piston 5 is made up of a fixed piston piece 51 fixed to the piston rod 4 and a movable piston piece 52 that can move a certain distance on the piston rod 4. The piston 5 is fixed to the piston rod 4 at a predetermined interval. It is arranged between the stop rings 6 and 61.

The fixed piston piece 51 is fixed to the piston rod 4 with its back surface abutting one of the stop rings 6, and has a central through hole 53 through which the piston rod 4 is inserted.
, on its outer peripheral surface there is a truncated conical surface portion 54 that tapers toward the rod cover 3 side, and a single pore 5 that penetrates through its plate thickness.
5 is formed.

(See FIGS. 6 and 7) On the other hand, the movable piston piece 52 is made of a cylindrical body with a bottom, and has a central through hole 56 in its center through which the piston rod 4 is inserted, and a hole surrounding the central through hole 56 in its bottom. A plurality of through holes 57 are arranged radially in the inner peripheral surface thereof, and a cylindrical surface portion 58 that communicates with the through holes 57 and a cylindrical surface portion 58 that is continuous with the cylindrical surface portion 58 and engages with the outer peripheral truncated conical surface portion 54 of the fixed piston piece 51. A matching frusto-conical surface portion 59 is formed.

Reference numeral 7 designates a coil spring disposed with one end in contact with the fixed piston piece 51 and the other end in contact with the bottom of the inner peripheral surface of the movable piston piece 52. A spring force is applied to push it to the side.

Therefore, in normal times, the fixed piston piece 51 and the movable piston piece 52 are held at a predetermined distance by the coil spring 7.
A flow gap S for the liquid O is formed between the outer peripheral truncated conical surface portion 54 of the movable piston piece 52 and the truncated conical surface portion 59 of the movable piston piece 52 .

The hydraulic cylinder 1, the liquid 0 filled in the hydraulic chamber R of the hydraulic cylinder 1, the head cover 2, the rod cover 3, the piston rod 4, and the piston 5 consisting of a fixed piston piece 51 and a movable piston piece 52. A shock absorber B is provided as a coil spring 7 disposed between the piston pieces.

4 shows the position of the piston 5 of the shock absorber when the revolving door A is closed, and FIG. 5 shows the position of the piston 5 of the shock absorber when the revolving door A is open.

In the shock absorber B constructed in this manner, the hydraulic pressure chamber R formed in the hydraulic cylinder 1 is divided into hydraulic pressure chambers R1 and R2 by the piston 5 disposed within the hydraulic pressure chamber R, and the piston 5 is divided into hydraulic pressure chambers R1 and R2. The fixed piston rod 4 passes through the hydraulic pressure chamber R and has both ends protruding from the head cover 2 and the rod cover 3, so that the hydraulic pressure chamber R1 (or hydraulic pressure chamber R2) generated by the movement of the piston 5 is The volume decrease amount is equal to the volume increase amount of the hydraulic pressure chamber R2 (or hydraulic pressure chamber R1).In other words, since there is no change in the volume of the hydraulic pressure chamber R due to the movement of the piston 5, the piston 5, That is, the fluid flows through the flow gap S formed between the outer peripheral frustoconical surface portion 54 of the fixed piston piece 51 and the frustoconical surface portion 59 of the movable piston piece 52 and through the plurality of through holes 57 formed at the bottom of the movable piston piece 52. A buffering effect is exerted by the flow resistance of the liquid 0.

Therefore, in normal door opening/closing operations, the mutual displacement between the hydraulic cylinder 1 and the piston 5 occurs at a relatively low speed, so that the liquid 0 in the hydraulic chamber flows through the through hole 57 formed in the piston 5 and into the flow gap S. Flow resistance is small, and therefore, in normal door opening/closing operations, there will be no inconveniences such as a large force being required to open and close the door or the opening and closing not being smooth.

On the other hand, if a large force is applied to the door in the closing direction due to wind pressure or the like while the door is opening or closing, that is, if the closing speed increases (in the direction of arrow X in Fig. 4), the hydraulic cylinder 1 and the piston 5
The relative velocity of the movable piston piece 52 increases, whereby the movable piston piece 52
As the pressure of the liquid 0 applied to the plate surface increases, the movable piston piece 52 moves toward the fixed piston piece 51 against the spring force of the coil spring 7, and the truncated conical surface portion 59 of the movable piston piece 52 Outer periphery truncated conical surface portion 5 of fixed piston piece 51
4 to close the flow gap S.

(Fig. 7) As a result, from the hydraulic pressure chamber R1 to the hydraulic pressure chamber R2.
The liquid 0 flows only through the pore 55 formed in the fixed piston piece 51, and the movement of the door A is decelerated and the movement of the door A is reduced.
This prevents the door glass from impacting the door frame, and as a result, damage to the door glass and unexpected accidents to the human body are prevented.

Reference numerals 8 and 81 indicate rod guide bushings arranged on the rod cover 2 and the rod cover 3, respectively.

Reference numeral 9 denotes a support fitting that is screwed and fixed to the threaded end portion 42 of the piston rod 4 protruding from the rod cover 3 side fixed to the hydraulic cylinder 1.

The support fitting 9 includes a fixing part 92 having a threaded part 91 that engages with the threaded end part 42 of the rod, and a bifurcated piece 94 formed by a cut groove 93 formed integrally with the fixing part 92 in its longitudinal direction. .94, and an insertion hole 96 is formed in the engagement support part 95, which extends perpendicularly to the cut groove 93 and passes through the bifurcated piece 94.94. There is.

In the engagement support portion 95, a mounting bracket 10 is fixed to the door upper stile a in the cut groove 93 with the door rotation axis 1 raised up.
0 and is engaged with the pin 200, so that the support fitting 9 can rotate around the pin axis.

Reference numeral 10 designates a fixing bolt that is screwed into an engagement hole 22 formed in the helad cover 2.

The fixing bolt 10 has a threaded portion 11 that is screwed into the engagement hole 22.
, a square collar part 12 continuous with the threaded part 11, a cylindrical shaft part 13 continuous with the threaded part 11, and a threaded part 14 continuous with the shaft part 13.

Then, after the cylindrical shaft portion 13 is engaged with the engagement hole 301 of the mounting bracket 300 fixed to the door upper frame, the nut N is screwed onto the bolt threaded portion 14 via the washer W to attach it. , the hydraulic cylinder 1 to which the fixed pole hlO is fixed is rotatable at the cylindrical surface portion 13 with respect to the mounting bracket 300.

400 is a protection cylinder screwed and fixed to the other end of the herad cover 2.

Next, the operation of the rotating door with a shock absorbing device constructed as described above will be explained.

In the state shown in FIG. 4, that is, in the closed state of the rotating door A, the piston 5 is located on the rod cover 3 side of the hydraulic cylinder 1.

When the revolving door A is opened from this state, the piston rod 4 moves in the direction of the arrow Y in FIG. 4 as the door A is opened.

At this time, the piston rod 4 is rotatably supported by a support fitting 9 fixed at its tip to a mounting fitting 100 fixed to the door stile a, and the hydraulic cylinder 1 is rotatably supported by a mounting fitting 100 fixed to the door stile a. Since it is rotatably supported by the metal fitting 300, mutual displacement of the hydraulic cylinder 1 and the piston 5 disposed on the piston rod 4 due to the rotation of the door is performed smoothly.

When moving the piston rod 4, in the case of a normal opening operation, the piston 5 disposed on the piston rod 4
That is, the fixed piston piece 51 and the movable piston piece 52 do not change their positions, and a flow gap S is formed between the outer periphery truncated conical surface portion 54 of the fixed piston piece 51 and the truncated conical surface portion 59 of the movable piston piece 52. ing.

(Fig. 6) Therefore, as the piston rod 4 moves, the liquid 0 in the hydraulic pressure chamber R flows through the flow gap S and the through hole 57 formed at the bottom of the movable piston piece 52, and flows toward the hydraulic pressure chamber R. Therefore, when opening the door, the opening operation is performed smoothly without any resistance, and the piston 5 moves smoothly from the position shown in FIG. 4 to the position shown in FIG.

On the other hand, if a strong wind or the like acts in the closing direction of door A during the above-mentioned opening operation, the closing speed of several doors A increases due to the wind pressure, and at the same time the hydraulic cylinder 1 and the piston 5 disposed on the piston rod 4 The relative speed increases, thereby increasing the pressure of the liquid 0 on the plate surface of the movable piston piece 52, and this pressure causes the movable piston piece 52 to move toward the fixed piston piece 51 against the spring force of the coil spring 7. Moving.

Due to the movement of the movable piston piece 52, the frustoconical surface portion 59 of the movable piston piece 52 engages with the outer peripheral frustoconical surface portion 54 of the fixed piston piece 51, closing the flow gap S formed between them. do.

(Fig. 7) Therefore, the flow of liquid 0 from the hydraulic pressure chamber R1 to the hydraulic pressure chamber R2 is only from the pore 55 formed in the fixed piston piece 51, so that the door A is closed in the closing direction. The speed is reduced, or in other words, it is maintained as if it were at a standstill.

As a result, the door A is prevented from impacting the door frame, and damage to the door glass and unexpected accidents to the human body are prevented.

Note that after the strong wind is removed, the movable piston piece 52 is returned to its normal position by the spring force of the coil spring 7, and the truncated conical surface portions 54 and 59 of the movable piston piece 52 and the fixed piston piece 51 engage with each other. When the liquid 0 is removed, a flow gap S is created there, and since the liquid 0 flows through the gap S, the opening operation can be performed smoothly without encountering any resistance.

The present invention has the above-mentioned structure, and the door can be opened and closed normally without any inconveniences such as requiring a large force or not being able to open and close smoothly, and only when large forces such as wind pressure are applied. By installing a shock absorbing device that resists the movement of several doors and prevents the closing speed from increasing, thereby preventing the doors from impacting against building components, it prevents damage to the door glass and unexpected accidents to people. It is something that can be done.

[Brief explanation of drawings]

Fig. 1 is an external view showing one embodiment of a revolving door with a shock absorbing device according to the present invention, Fig. 2 is a plan view showing how the shock absorbing device and revolving door are installed, and Fig. 3 is a side view of Fig. 2; FIG. 4 is a sectional view showing the position of the piston when the revolving door is in the closed state, and FIG. 5 is a sectional view showing the position of the piston when the revolving door is in the open state.
Figures 6 and 7 are cross-sectional views of main parts showing the movement of the piston, Figure 8 is a perspective view of the support fitting fixed to the tip of the piston rod, and Figure 9 shows the state in which the piston rod and support fitting are installed. FIG. 1: Hydraulic cylinder, 2: Head cover, 3: Rod cover, 4: Piston rod, 5: Piston, 51: Fixed piston piece, 52: Movable piston piece, 54.59: Frustoconical surface part, 56: Through hole , 58 two cylindrical surfaces, 7: coil spring, a: door frame, 6: door frame, R: hydraulic chamber, 10
0,300: Mounting bracket.

Claims (1)

[Scope of utility model registration request] A helad cover is fixed to one end of the hydraulic cylinder and a rod cover is fixed to the other end to form a hydraulic chamber within the hydraulic cylinder, and the hydraulic chamber is filled with liquid and the end It consists of a piston rod whose parts protrude from both force bars, a fixed piston piece which is arranged on the piston rod and has a truncated conical surface part on its outer peripheral surface, and a cylindrical body with a bottom, which has a through hole in its bottom part. A piston comprising a movable piston piece, the inner peripheral surface of which has a cylindrical surface communicating with the through hole, and a truncated conical surface that is continuous with the cylindrical surface and engages with an outer truncated conical surface of the fixed piston piece; A shock absorber is constructed by disposing a coil spring located between the piston pieces and holding the piston pieces at a predetermined distance, and the hydraulic cylinder of the shock absorber constructed in this way is attached to a mounting bracket fixed to the door frame. ,
A rotating door with a shock absorbing device in which piston rods protruding from the rod cover side are rotatably attached to mounting brackets fixed to the door upper stile beyond the door rotation axis.