JPH08200407A - Fluid type brake device and gate using the same - Google Patents

Abstract

PURPOSE: To provide a fluid type brake device in which brake force is automatically changes according to movement of a drive member or rotary speed and which can turn at 360 deg. and a gate using the same. CONSTITUTION: A rotary shaft 5 a tip part of which is projecting from a top face of a housing with liquid-tightly sealed is mounted turnable in a central part of a cylindrical housing 3 which has a space part 2 to be a liquid chamber inside the housing and also a lower opening of which is closed in liquid-tightly sealed by a cap member 4 and a plurality of pistons 7 are arranged uniformly in an outer periphery part of a rotor 6 mounted integral on the rotary shaft 5 such that an outer periphery surface part is opposite to an inner periphery surface of the housing 3 with a designated space given to form a fluid type brake device 1. Then a roller 13 mounted on a tip part of the rotary shaft of this fluid type brake device 1 is brought into contact with a rail mounted on a bottom of a sliding type gate body to brake the gate body according to opening and closing speed of the gate body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device that uses a fluid such as oil or water as a medium, and more specifically, a braking force that freely increases or decreases in accordance with the speed at which a driving body moves or rotates. The present invention relates to a rotatable stepless hydraulic braking device and a gate using the hydraulic braking device.

[0002]

2. Description of the Related Art As an example of a fluid type braking device that rapidly applies a braking force according to a rotational speed with a slight force, for example, Japanese Patent Application Laid-Open No. 49-62859 discloses that a rotary member is used.
By rotating two vanes (vanes) at an interval of 0 °, the fluid in the fluid passage formed by the cylindrical case and the concentric cylindrical roller is pressed and circulated, and the on-off valve provided in this fluid passage is closed to rotate the rotor. There is disclosed a brake that rapidly stops a rotating body with a given momentum of a fluid according to the speed of.

On the other hand, as a non-rail type sliding gate installed in a place with a relatively wide frontage such as a factory, various schools, public facilities, etc.
As disclosed in Japanese Patent No. 26511, a gate body formed by integrally fixing rails having a mountain-shaped cross section along the longitudinal direction of the upper side and the lower side is passed vertically through a slide box installed on the site, A pair of upper and lower supports provided with a pair of guide rollers capable of rotating by contacting both inclined surfaces of the upper and lower rails of the gate main body are provided at predetermined intervals in the opening and closing direction of the gate main body in the slide box. A slide gate in which the gate main body is supported by guide rollers and fixed in position is widely known.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Many fluid type braking devices including the brake disclosed in Japanese Patent No. 859 have a fluid passage or a housing formed in the housing by compressing a fluid such as oil filled in the housing with a piston or a vane. A braking force is generated by controlling a fluid control valve provided in an outside fluid passage and changing the amount of fluid. Therefore, many of these known hydraulic brakes require the formation of fluid passages inside or outside the housing and require a fluid control valve, often resulting in a piston or vane rotation of 36 degrees.
At present, the application is naturally limited because it is not 0 ° but a finite one limited within a certain range.

On the other hand, the above-mentioned non-rail type sliding gate is widely used because it has the advantage that it does not need to lay a rail in the site to be opened and closed and that the gate can be opened and closed regardless of the road surface condition. ing. However, since these slide gates generally have an extremely wide opening width of 5 to 6 m, the weight of the gate body is about 2 mm.
It is very heavy, around 50 kg, and it takes about 10 kgf of force to open and close it manually, but once it starts moving, acceleration is applied, so slide the gate body with a force much smaller than the force at the time of initial movement. You can
Therefore, when the gate body is pulled out from the slide box and then strongly pressed toward the door stop provided at the other end, the acceleration causes momentum in the movement of the gate body, causing a violent collision with the door stop and damaging the door stop. An accident has occurred. In addition, since the gate body with a bounce is itself very heavy as described above, it is extremely difficult to easily stop the gate body if there are people or other obstacles in the opening. Therefore, there was a risk of causing an unexpected accident. In addition, such a danger can be caused by, for example, when a delivery factory or the like uses a roller type conveyor to sort the deliveries, when the deliveries placed on the conveyor are strongly pressed in the moving direction, or when they are installed at the opening of the building. The same can occur when opening and closing the vertically movable shutter.

SUMMARY OF THE INVENTION In view of the above circumstances, one object of the present invention is to provide a simple hydraulic braking device having a structure capable of 360 ° rotation in which the braking force is automatically increased / decreased in accordance with the movement or rotation speed of a driving body. It is intended to be provided. Another object of the present invention is to provide a gate that can prevent an unexpected accident that may occur when opening and closing the gate by providing the fluid braking device in a slidable gate body. It is something to do.

[0007]

In order to achieve the above-mentioned object, a fluid type braking device of the present invention is a cylindrical housing having a space inside which serves as a liquid chamber and having an opening at the bottom, and an opening of the housing. A liquid-tightly closing cap member,
A rotary shaft rotatably provided in the center of the space of the housing in such a manner that its tip portion penetrates the center of the upper surface of the housing in a liquid-tight manner; a rotor that rotates integrally with the rotary shaft; A plurality of pistons that are evenly arranged with a required spacing on the outer peripheral portion of the rotor, and there is a required spacing between the inner peripheral surface of the housing and the outer peripheral portion of the piston. It is characterized by being provided.

Further, a gate using the fluid type braking device of the present invention has a rail provided at least at the bottom of the gate main body supported by a guide roller, and the gate main body is slidable by the guide roller. A rotary shaft having a distal end liquid-tightly protruding from the upper surface of the housing is rotatably provided at the center of a cylindrical housing that has a space portion serving as a liquid chamber and has a lower opening liquid-tightly closed by a cap member. A fluid type braking device in which a plurality of pistons are evenly arranged on an outer peripheral portion of a rotor integrally provided on the rotating shaft so that an outer peripheral surface portion of the housing faces a predetermined distance from the inner peripheral surface of the housing. A roller integrally provided at the tip of the rotating shaft is directly or indirectly brought into contact with the rail at the bottom of the gate main body, and the gate main body is attached to the gate main body according to the opening / closing speed of the gate main body. Those configured to be able to apply a motion.

In the hydraulic braking device of the present invention, the housing is of a cylindrical shape having a space inside which serves as a liquid chamber, the upper part of which is closed, and screw holes for mounting are provided on the outer peripheral edges of the upper surface facing each other. It is desirable to integrally form a flange with a cap member, and a cap member is liquid-tightly attached to the lower opening through an O-ring.

The fluid filled in the housing may be one having viscosity such as oil or grease, or one not having viscosity like water, depending on the application and required braking force. Since it can be freely and selectively used, there is no particular limitation.

The rotor, which is rotatably provided at the center of the space in the housing, has a rotor integrally fixed to the base end of the housing, and the tip of the rotor is liquid-tight in the center of the upper surface of the housing. The tip of the rotary shaft protruding to the upper surface of the housing is directly or indirectly connected to a driving body for controlling the speed.

The piston integrally attached to the rotor is basically composed of a block body whose height is slightly lower than the height of the inner peripheral wall of the housing minus the thickness of the cap member. However, in actual use, since a disk-shaped bearing member having a predetermined thickness for rotatably mounting the base end portion of the rotating shaft is provided on the inner bottom surface of the cap member, the block body is The height is set to the height of the inner peripheral wall of the housing minus the thickness of the cap member and the bearing member. Further, a plurality of the pistons are integrally provided on the outer peripheral portion of the rotor with a predetermined interval.
It is preferable that they are evenly arranged. The number of pistons may be two or four or more at 180 ° intervals, but in the case of four or more, a multiple of 3 is more preferable.

In the piston, the outer peripheral surface corresponding to the inner peripheral surface of the housing and the inner peripheral surface corresponding to the rotating shaft are both formed in an arc shape, and between the outer peripheral surface of the piston and the inner peripheral surface of the housing. A gap is formed for the fluid to move. The larger this gap, the weaker the braking force,
Since the braking force increases as the width becomes narrower, it is preferable to freely change the braking force according to the application and the required braking force.

Further, the piston is provided with a liquid reservoir penetrating from the upper surface to the lower surface of the block body, and further, by changing the diameter of the liquid reservoir, or a concave shape is formed on the inner peripheral surface of the housing. It is possible to adjust the braking degree by forming a liquid reservoir composed of parts.

A gate using the fluid brake is provided with a pair of guide rollers at an upper part and a lower part in a front-back direction in a slide box, and the gate main body is slidably penetrated between the upper and lower guide rollers in an upright state. At least one of the guide rollers, specifically, the front and rear guide rollers arranged below contact the rail provided at the bottom of the gate body, and the guide roller slides the gate body. , There is no other special limitation.

In order to apply the fluid type braking device to the gate main body, a roller provided at the tip of the rotary shaft projecting from the upper part of the housing on one of the inclined surfaces of the rail provided at the bottom of the gate main body. To directly or indirectly abut. The means for indirectly contacting is, for example, by interposing a rubber rotation roller between the guide roller that supports the gate body and the roller provided at the tip of the rotation shaft of the hydraulic braking device. Can be achieved.

[0017]

In the fluid type braking device of the present invention, a fluid such as oil that is liquid-tightly filled in the housing is pressed by a plurality of pistons that are evenly arranged on the rotor integrally fixed to the rotating shaft, and the fluid housing By changing the internal shape, it is possible to generate a braking force according to the movement or rotation speed of the driving body.

Further, in the gate using the fluid type braking device, since the rail provided at the bottom of the gate body is in contact with the rotary shaft of the fluid type braking device via the roller, for example,
When pulling out the gate main body to close the doorway, it can be pulled out with normal force with almost no load applied, and even if the gate main body is pushed out in the closing direction after pulling out, the braking force depends on the moving speed. As it occurs, there is no risk of unexpected situations.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fluid type braking device of the present invention and a gate using the braking device will be described in detail below with reference to the accompanying drawings. 1 to 4 show a hydraulic braking device according to the present invention. In FIG.
Is a cylindrical housing 3 having an upper part closed, a lower part opened, and a space 2 for hermetically filling a fluid therein, and a screw-type cap member for liquid-tightly closing the opened lower face. 4, a rotary shaft 5 rotatably provided in the central portion of the space 2 of the housing 3 in a state where a tip portion thereof penetrates through the central portion of the upper surface 3a of the housing 3 in a liquid-tight manner, and It is composed of a disk-shaped rotor 6 integrally fixed to the base end portion, and a plurality of pistons 7, 7, 7 integrally arranged on the outer peripheral portion of the rotor 6 at a predetermined interval. .

The housing 3 has flanges 3b formed by extending outwardly facing outer peripheral edge portions of the upper surface 3a, and each flange 3b is provided with a screw hole 3c for attaching the hydraulic braking device 1 to an attached body. The diameter of the cylindrical part is about 80 mmφ, the height is about 52 mm, and the flange 3c is formed.
Has a thickness of about 8 mm and is made of metal.

The rotary shaft 5 rotatably provided at the center of the space 2 of the housing 3 is formed by cutting a part of the base end and the tip of a cylindrical shaft member so that the cross section becomes rectangular. After projecting one of the base ends from the lower surface of a rectangular shaft hole 6a provided in the center of the disk-shaped rotor 6,
A base end of which is rotatably provided in a shaft hole of a bearing member 8 which is provided on the inner bottom surface of the cap member 4 in a liquid-tight manner, and the other end portion of which is made to project in a liquid-tight manner from the central portion of the upper surface 3a of the housing 3. Then, the square base end of the rotary shaft 5 and the square shaft hole 6 of the rotor 6
The rotating shaft 5 and the rotor 6 are inseparably connected by the engagement with a.

Three pistons 7, 7, 7 are integrally fixed to the outer peripheral portion of the rotor 6 integrally provided at the base end of the rotary shaft 5 at intervals of 120 °. The piston 7 is composed of a block body whose height is slightly lower than the height obtained by subtracting the total thickness of the cap member 4 and the bearing member 8 from the height of the inner peripheral wall of the housing, and faces the rotary shaft 5. The inner peripheral surface 7a and the outer peripheral surface 7b corresponding to the inner peripheral surface 3d of the housing 3 are both formed in an arc shape, and when mounted in the housing 3, the outer peripheral surface 7b of the piston 7 and the housing 3 are formed. A gap d is formed between the inner peripheral surface 3d and the inner peripheral surface 3d at a required interval depending on the application. Further, each piston 7 has a liquid reservoir 7c formed of a through hole penetrating from the upper surface to the lower surface.

In FIG. 1, 9 is an O-ring, 10,
Reference numeral 11 denotes a bearing, and 12 denotes an oil seal. Further, in the fluid type braking device 21 shown in FIG. 4, a liquid reservoir 23a composed of a semicircular concave portion is formed on the inner peripheral surface of the housing 23, and two liquid reservoirs 23a may be continuously provided. Often, when the liquid reservoir 23a and the outer peripheral surface of the piston 27 face each other, the shape of the fluid changes between the outer peripheral surface and the liquid reservoir 23a, and the rotational speed of the rotary shaft 25 is increased or decreased depending on the amount of change of the fluid. It can be done.

In the hydraulic braking device 1 having such a structure, a rubber roller 13 is integrally attached to the tip of the rotary shaft 5 protruding from the upper surface 3a of the housing 3, and the roller 13 is, for example, a rotating body. When the driving body (not shown) is brought into contact with the driving body, a load more than a predetermined amount does not act on the driving body when the moving or rotating speed of the driving body is in a constant state. As the rotation speed becomes abnormally high, the fluid sealed in the housing 3 is deformed by the pistons 7, 7, 7, and the braking force increases as the repulsion of the fluid against this deformation increases, so that the driving body is driven. It gives a brake.

That is, when the movement or rotation speed of the driving body is transmitted to the hydraulic braking device 1 through the rotary shaft 5, the rotor 6 integrated with the rotary shaft 5 and the piston 7 integrated with the rotor 6 rotate in a fixed direction. However, when the speed is constant, there is no change in the shape of the fluid. However, if the speed increases or decreases, the piston 7
The friction between the surface and the fluid contact surface increases or decreases, and at the same time, the fluid tries to flow out to the other piston side from the gap d formed between the inner peripheral surface 3d of the housing 3 and the outer peripheral surface 7b of the piston 7. The friction between the molecules of the fluid increases or decreases, and the increase or decrease in the rotational speed of the rotating shaft 5 controls the movement or rotational speed of the driving body.

FIG. 5 shows a gate 30 using the hydraulic braking system 1 of the present invention. A guide in which a gate main body 32 is vertically paired in a slide box 31 provided at a predetermined position. The gate body 3 is vertically held by a roller (not shown) and is held there.
Rails 33 having a V-shaped cross section are integrally provided on the upper and bottom portions of the rail 2 along the longitudinal direction, and the guide rollers arranged on the left and right inclined surfaces of the rails 33 in pairs in the front-back direction in the left-right direction. And is slidably moved by the rotation of the guide roller. In such a gate body 32, one of the left and right inclined surfaces of the rail 33 integrally attached along the longitudinal direction of the bottom is provided integrally with the tip of the rotary shaft 5 of the hydraulic brake device 1. The rubber roller 34 is brought into contact with the rubber roller 34. Therefore, when pulling out the gate main body 32 when opening and closing the gate 30, a pulling force slightly higher than the normal pulling force is required, but when an abnormal pulling force is applied to the gate main body 32, the fluid type braking device 1 is used. The braking force can be applied according to the moving speed of the gate main body 32. Incidentally, reference numeral 35 in the drawing denotes a mounting member for mounting the fluid type braking device 1.

As described above, the fluid type braking device having the above-mentioned structure can solve the problem peculiar to the slide type gate by applying it to the slide type gate. The same effect can be obtained by applying it to a shutter that is slidable in the vertical direction at the entrance / exit of a product or a roller type conveyor used to efficiently sort articles in a certain direction.

[0028]

According to the hydraulic braking device of the present invention, there is a required space in the outer peripheral portion of the rotor which is integral with the rotating shaft provided in the center of the cylindrical housing for liquid-tightly filling the fluid such as oil. Since a plurality of pistons are arranged so that the outer peripheral surface thereof has a required clearance between the outer peripheral surface and the inner peripheral surface of the housing, when the movement or rotational force of the driving body is transmitted to the rotating shaft, the rotor is rotated. The piston comes into contact with the fluid as it rotates, causing a change in the shape of the fluid in the housing, and the resistance force resulting from this change can be used to generate a braking force. The brake can be effectively applied.

In particular, since the hydraulic braking device of the present invention utilizes the resistance generated by the deformation of the fluid rather than the compression of the fluid, it does not require a fluid passage or a fluid control valve in the housing and has a very simple structure. Can be
Since the rapid deformation of the fluid in the housing is proportional to the movement of the driving body and the amount of change in the rotation speed, the braking force increases as the rotation of the rotating shaft increases, and decreases as it decreases.
In either case, the braking effect is immediately exhibited, and the rotation shaft can be rotated in any direction of 360 °.

Further, a gate using the fluid type braking device of the present invention is provided with a rotary shaft of the fluid type braking device having the above-mentioned features on a rail provided at the bottom of a gate body which is slidable in an opening / closing direction which constitutes the gate. Since it is configured to contact the integral roller, the moving speed at the time of sliding is immediately transmitted to the hydraulic braking device via the roller, and the fluid in the housing is rapidly deformed in proportion to the rotation speed of the rotating shaft. Therefore, even if the gate body is inadvertently applied with force when opening and closing, the speed of the slide is controlled by the action of the fluid type braking device, and there is no possibility of causing an unexpected accident. It has a great advantage in practical use such as a simple device.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an example of a hydraulic braking device of the present invention.

FIG. 2 is a plan view in which a part of the hydraulic braking device in FIG. 1 is cut away.

FIG. 3 is a perspective view of a drive unit of the hydraulic braking device in FIG.

FIG. 4 is a partially cutaway plan view of another example of the hydraulic braking device of the present invention.

FIG. 5 is a partially cutaway side view showing a main part of an embodiment of a gate using the hydraulic braking device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid type braking device 2 Space part 3 Housing 3d Inner peripheral surface of housing 4 Cap member 5 Rotating shaft 6 Rotor 7 Piston 7b Piston outer peripheral surface d Gap 30 Gate 32 Main gate 33 Rail 34 Roller

Claims (5)

[Claims] 1. A cylindrical housing having a space part inside which serves as a liquid chamber, the bottom part of which is open, a cap member which liquid-tightly closes the opening part of the housing, and a tip at the center of the space part of the housing. A rotary shaft that is rotatably provided in a state in which a central portion of the housing penetrates the upper surface of the housing in a liquid-tight manner, a rotor that rotates integrally with the rotary shaft, and a required space between the outer peripheral portion of the rotor. And a plurality of pistons that are evenly arranged, and a fluid type characterized in that a predetermined gap is provided between the inner peripheral surface of the housing and the outer peripheral portion of the piston. Braking device. 2. The liquid braking apparatus according to claim 1, wherein three pistons are evenly arranged on an outer peripheral portion of the rotor at intervals of 120 °. 3. The liquid braking device according to claim 1, wherein the piston has a liquid reservoir penetrating from the upper surface to the lower surface. 4. The hydraulic braking device according to claim 1, wherein the housing has a concave portion formed on an inner peripheral surface thereof. 5. A gate in which at least a rail provided at the bottom of the gate main body is supported by a guide roller, and the gate main body is slidable by the guide roller, the interior of the gate has a space portion serving as a liquid chamber and a lower opening. A rotary shaft having a distal end protruding in a liquid-tight manner from the upper surface of the housing is rotatably provided at the center of a cylindrical housing whose part is liquid-tightly closed by a cap member, and the outer circumference of the rotor integrally provided on the rotary shaft. A roller integrally provided at the tip of the rotary shaft of the hydraulic braking device in which a plurality of pistons are evenly arranged so that the outer peripheral surface of the housing faces the inner peripheral surface of the housing at a predetermined distance. Is directly or indirectly abutted on the rail at the bottom of the gate main body, and the gate main body can be braked according to the opening / closing speed of the gate main body. The gate to do.