JPH0730652B2 - Door check - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a piston movable in a casing against the force of at least one return spring and a forward hydraulic pressure arranged on this side of this piston. The present invention relates to a door check having a hydraulic overflow device from a rear hydraulic chamber arranged on the other side of the piston from the chamber to the other cylinder chamber.

[Conventional technology]

Various types of door check (door closing device) of this type are known regardless of whether they are mounted on the upper part of the door or on the floor side of the door. In a floor-mounted door check, the door to be closed is non-rotatably connected to a rotatable drive member. In the door check installed on the upper part of the door, the door check casing is fixed to the door. The connection with the fixed door frame is performed via the rod. In any case, the opening / closing movement (rotational movement) of the door is transmitted to the door gradual closing mechanism via the drive member, and this door gradual closing mechanism converts the rotational movement of the drive member into the movement movement of the piston. In the door check attached to the upper part of the door, for example, the driving member is connected to the pinion, and the pinion meshes with the rack of the piston. A drive member can be connected to the cam in a door check, which is mounted on the door on the floor side, which acts on a roller of the slider which is connected to the piston rod. In each case, the piston is brought from the starting position to the moving position and tensions the return spring carried by the piston and the casing. When the door is opened, the hydraulic medium filled in the casing of the door check is not substantially throttled and overflows, for example, from the front hydraulic chamber to the rear hydraulic chamber. This overflow is caused by the piston movement, which causes one hydraulic chamber to decrease and at the same time the other hydraulic chamber to correspondingly increase. The hydraulic medium overflows, for example, via a valve device provided on the piston and / or the piston rod. When the door is released, the return spring pushes the piston back into its starting position, in which case both hydraulic chambers gradually return to their original size. In that case, the hydraulic medium must flow through another path and at least through the throttling device. This results in a relatively slower overflow than when opening, so that the door is gradually and automatically closed during the corresponding throttling adjustment compared to when it is opened manually.

The special device of the door check can forcefully close the door as compared with the case of closing it via the expansion device. Furthermore, a door check of this kind can be provided with a locking device for a wide open door, in particular a hydraulic locking device. If a hydraulic locking device is provided, at least one passage or additional passages are provided in the casing of the door check.

As already mentioned, not only are there door mounts that attach to the top of the door and those that attach to the door on the floor side, but there are also door checks for light, medium and heavy doors. In addition, the drive member of the door check may include various rods or other features. For example, a simple scissor link, and even
There is also a so-called parallel link mechanism. The parallel link mechanism is particularly advantageous in terms of appearance. The closing force can be adjusted each time.

Since there are so many models, it is no wonder that each door check has a different casing in the same manufacturer. In that case, a relatively small number of casings is assigned to each model in terms of the total number of door check manufactured. This increases the production cost of each individual door check.

[Problems of the Invention]

An object of the present invention is to reduce the production cost of a door check.

[Means for Solving the Problems]

The gist of the present invention which has solved the above problems is as set forth in claim 1.

[Operation and effect of the present invention]

By dividing the door check casing into the basic casing and the spring casing, the production cost of this type of door check can be considerably reduced as desired.
This is because the basic casing suitable for all models can be provided with all the passages necessary for overflowing the hydraulic medium from the front cylinder chamber to the rear cylinder chamber, and all valves, A throttling mechanism and other hydraulic devices can be attached, on the other side it is not necessary to provide a hydraulic passage in the spring casing, only this spring casing can be connected liquid-tight to the basic casing. Because. Therefore, the same type of basic casing can be used to manufacture all types of door check, which results in a high number of individual products. In short, various door checks can be produced by simply incorporating springs of different strengths and thus lengths for light, medium and heavy doors, for example. In that case, smaller springs require less space than medium or large springs. Therefore, by varying the size of the spring casing alone, it is possible to produce a door check that is compatible with the size and weight of the door. The spring casing is simple in construction because it does not contain hydraulic passages and devices. Due to its simple construction, this spring casing can be manufactured in different sizes or (more precisely expressed) in length, depending on the size or weight of the door and in relation to the corresponding spring casing. Natural springs can be used.

Due to the fact that, for all kinds of door check, regardless of its hydraulic system and therefore the technical possibilities of this door check, the same basic casing can be used, it is possible to divide the casing into two parts. Not only is the increase in costs incurred, but the overall reduction in production costs is achieved.

As the number of individual basic casings to be manufactured increases,
Automatic production machines can be installed. This alone will significantly reduce production costs.

When manufacturing the basic casing, it is not necessary to distinguish whether each of the basic casings should be used for one simple or technically complex door check. This means that one basic casing of a simple door check is provided with more passageways, holes, receptacles and the like than is necessary, but the various basic casings are made separately and Production costs are low compared to the case where adjustments and / or programming have to be performed separately for automatic production. For relatively simple or less complex door checks, at least one stopper, seal or other closely inserted known member, such as screws, bolts, etc., may be used to break unnecessary hydraulic circuits. . If the fixing hole is at least partly a screw hole, the plug can consist of a screw plug.

In an advantageous embodiment of the invention, the basic casing has in particular casing channels in two oppositely located casing walls, each casing channel being provided with a countersink for a throttle screw, a throttle valve or the like. Optionally, one or at least one receptacle is screwed with a closure or the like for interruption of the associated casing passage. The shape of the closure must be compatible with the dimensions of the throttle screw etc. screwed in instead. This is necessary for screwing and blocking passages at key points. Furthermore, a closure plug which can be easily manufactured as compared with an inexpensive material, in some cases, a drawing screw or the like may be provided.

In a further development of the invention, the basic casing comprises a casing bottom, which is inserted under a seal at the end remote from the spring casing, the casing bottom optionally including a valve unit or at least one casing passage. Equipped with a part of. In this case, the valve unit can cooperate with another valve unit mounted on the piston in a known manner. Such a construction is particularly suitable for doors with a locking device for doors that are wide open and / or doors controlled by, for example, magnet valves.
This is advantageous in door checks, such as those used in fire doors.

The exact arrangement of hydraulic valves, throttles, etc., which are used in the overflow passages as well as the expensive construction of the door check described so far, is known, for example from DE-GM 8526660.
For this reason, these parts of the door check will not be described in detail here. It also does not describe the functions of the door when it is open, when it is closed, when it is forcibly closed, and when it is locked.

〔Example〕

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings for a door check of a type that is attached to the upper part of a door, but the present invention is not limited to this. That is, the present invention is also applicable to a door check of a type that is mounted on the floor side of a door. The gist of the present invention is that, as shown in particular in FIGS. 5 to 8, door chains of different strength, which are hydraulically operated within the framework of this series and are equipped with various adjusting devices, are all of the same basic type. By having a casing, it is possible to mass-produce the same part. Different spring casings and / or adjusting devices are mounted on this basic casing. The spring casings are all similarly formed, at least at their connecting ends. Advantageously, the door checks shown in Figures 5 to 8 differ from each other in their length. Its length can be increased in steps. The outer casing (eg seat box) is also made larger stepwise (if it is provided). Due to the fact that the basic casings of all door checks of this series are the same, the same drive shaft is preferably mounted on the door check. Even if the door check is selectively configured for one or another type of adjusting device, only the same connecting member is required for different adjusting devices. The entire hydraulic device on the casing side is arranged only in the basic casing, which makes the spring casing considerably simpler and can be installed without problems. Particularly advantageously (but not necessarily), it is provided in all the examples of this series when the configuration of the hydraulic system is different,
The passage and the hole of the casing are formed in the same manner.
This automates mass production. This configuration is most effective in that the hydraulic simple structure is provided with all the holes, passages, etc. required for the extremely complicated embodiment, and then unnecessary holes and passages are plugged, sealed, etc. It is time to close. This is cheaper in manufacturing than the cost required to replace the automatic manufacturing apparatus. This is because the automatic manufacturing device means a small amount of production to some extent.

As can be easily understood by comparing FIGS. 2 and 4 with each other, the scissor-shaped link 1 penetrates into the room relatively deeply, which is not preferable in appearance. The parallelogram link 2 with the sliding arm 3 is remarkably smart in appearance. The mechanism for converting the rotational movement of the drive shaft 4 into the linear movement of the piston 5 will be described in detail later. To help understanding, in a word, the door check is code 6 regardless of its structure.
And is fixed to the door 7. Regardless of the shape, the free end of the adjusting device, which is designated by the reference numeral 8, is preferably stamped on the stationary frame 9. The swivel bearing above the door is shown at 10.

The basic casing used in all the examples of this series is indicated by 11. Spring casings 12, 13, 14 or 15 are mounted on this basic casing, in particular screwed. Depending on the length L of the spring casing, the length of the load spring 16 for the piston 5 is largely selected. Of course, this load spring may also partially project into the basic casing. If desired, a second load spring 17 can additionally be incorporated. 12 and 15, the left end of the load spring is supported by the corresponding end of the piston 5, and the other end of the load spring abuts the spring receiver 18 on the other side. This spring receiver is preferably a component of the adjusting device 19 for the spring force.

A relatively long piston is used in the door check installed on the upper part of the door, and a notch 20 is provided between both ends of the piston. A pinion 21 or 22 fixedly connected to the drive shaft 4 is fixed in the notch 20. Engaged. The teeth of this pinion are the rack 23 or formed on or removed from the piston.
It meshes with 24 teeth. The pivoting of the door causes the movement of the racks 23, 24 via the drive shaft 4 and the pinions 21, 22 in the direction indicated by the arrow 25. The rotary movement is indicated by the arrow 26.

Due to the movement of the piston in the direction indicated by arrow 25, the spring 16 or 17 is compressed. Further, the hydraulic medium filled in the door check 6 is pushed out from the front cylinder chamber 27, which is reduced by the piston movement, into the rear cylinder chamber 28. The flow passage must have a sufficiently large cross section for the overflow to occur quickly. For example, a hydraulic device 29 and / or 30 of known construction and function is incorporated in the piston 5 of the door check, which device comprises at least one corresponding opening check valve or the like.

When the opened door is released, the hydraulic medium flows backward from the rear cylinder chamber 28 into the front cylinder chamber 27. This is because the load springs 16 and 17 push the piston back into its starting position. In that case, the hydraulic medium flows in a separate flow path. This is because the backflow must be throttled to cause the door to close slowly. On the other side, for example the door 7
In order for the lock latch incorporated therein to be actuated via the force of the springs 16,17, the squeezed movement must be replaced by an unsqueezed movement as far as possible at its end.

The length and configuration of the hydraulic passages on the casing side, as well as their longitudinal and transverse holes, are known and are therefore not shown here. In order to throttle backflow, one or more throttle valves are inserted in the flow passage on the casing side. A particularly versatile and complex door check has, for example, four throttle valves 31 to 34. In the illustrated embodiment, the throttle passage has a basic casing 11
Are provided on the walls 35 and 36 located opposite to each other.
Advantageously, only the throttle valve 31 is inserted in the casing wall 35, the other throttle valves 32-34 are mounted in the wall 36.

If one throttle valve is required or at least all valves are not used, the unused holes can be closed at least outwardly by plugging, sealing or the like. If the flow passage receiving the throttle valve is not used for the eyelid, the seal or the like must be deep and fully inserted or formed long enough.

As can be seen from FIGS. 11 and 14, the basic casing can, for example, additionally have a fixing hole 37 into which a fixing screw can be inserted for mounting the door check. For example, a clipped casing cover protects the throttle valve and prevents unwanted access.

As can be seen from the above description, it would be advantageous if the basic casing of the same construction could be used for all the embodiments, but with different hydraulic means on the other side. Furthermore, as can be seen in FIGS. 12 and 15, the pistons or in particular the racks 23, 24 formed or fixed on them can also be formed if desired. The scissor rod shown in FIG. 12 uses a straight rack 23, whereas the parallel link 2 with the sliding arm 3 requires a specially formed rack 24 with special teeth as far as necessary. Becomes
Accordingly, the pinion 22 also has a special shape as can be seen from FIG. 15 in this embodiment. An eccentric pinion 22 is preferably used, in which case the center point of the annulus is offset with respect to the center point of rotation. If the pinion and the rotary shaft are made separately, the pinion is easily made, for example on a gear hobbing machine. The special teeth belonging to Rack can be produced with a broaching machine without any problems.

On the side opposite the spring casing is the casing bottom 39 of the basic casing 11. Advantageously, this casing bottom is sealed, in particular via at least one O-ring,
And it is detachably attached. Therefore, this casing bottom can be easily exchanged for other shapes. This is of particular importance insofar as the casing bottom 39 can be provided with at least one hydraulic passage and preferably at least one further hydraulic device, for example a check valve, as is known.
This is especially important in hydraulic locking devices for doors that are widely opened. The door can be locked in another way, for example by means of an electromagnet on the casing bottom 39. In that case, the electromagnet cooperates with a hydraulic valve or the like. The electromagnet is controllable by an auxiliary device, for example a smoke detector, and ensures that the door closes automatically during smoke emission,
Or do not hold the door in a wide open position.

The spring casings 12 to 15 preferably each have a cup-shaped configuration, in which case all the dimensions other than the length are preferably the same. The short spring hood 12 is used in the door check for light doors and the relatively long spring hood 13
Is used in medium weight doors and, on the other hand, a longer spring hood 14 is used for door checks according to the DIN standard. The longest spring hood 15 in the drawing can accommodate a relatively long spring and is for example a door check and parallel links for heavy doors and a corresponding DIN.
Used in standards.

At the free ends of the spring casings 12 to 15 on the side opposite from the basic casing 11, a central notch 40 of circular cross section is provided,
The notch 40 is penetrated by the shaft 41 of the spring adjusting device 19. A load spring 16,1 on its axially adjustable spring bearing 18
The right end of 7 is supported. In embodiments without a spring adjustment device, the notch 40 can be closed with a stopper.

[Brief description of drawings]

FIG. 1 is a view showing the upper left end of a door having a door check fixed to the upper part of the door, which is provided with scissor links,
2 is a top view of the door, FIG. 3 is a view showing an embodiment having a parallel link, FIG. 4 is a top view of the embodiment, FIG.
FIGS. 6, 7, and 8 are views showing an embodiment having the same basic casing and a spring casing which gradually increases, FIG. 9 is an end view of FIG. 5, and FIG. FIG. 11 is an end view, FIG. 11 is an enlarged view of the door check of FIG. 7, FIG. 12 is a cross-sectional view taken along line VII-VII of FIG. 11, and FIG. 13 is of FIG.
Sectional view taken along line VIII-VIII, FIG. 14 is a diagram showing a door check of another embodiment, FIG. 15 is a sectional view taken along line XV-XV of FIG. 14, and FIG. 16 is FIG. FIG. 6 is a sectional view taken along line XVI-XVI in FIG. 5 ... Piston, 11 ... Basic casing, 12,13,14,15
...... Spring casing, 16,17 …… Return spring, 27 …… Hydraulic chamber, 31,32,33,34 …… Throttle valve, 35,36 …… Casing wall,
39 …… Casing bottom, 40 …… Through hole, 41 …… Shaft.

Continuation of the front page (56) References JP-A-50-54140 (JP, A) JP-A-51-24047 (JP, A) JP-A-62-107184 (JP, A) Actual development Sho-63-10187 (JP , U) JP 37-9687 (JP, B1) JP 54-18499 (JP, B2) JP 57-24471 (JP, B2) JP 60-41192 (JP, B2) JP 61-125576 (JP, B2)

Claims (4)

[Claims] 1. A piston (5) movable in the casing against the force of at least one return spring (16, 17) and a front hydraulic chamber (27) arranged on this side of this piston.
To a rear hydraulic chamber (28) disposed on the other side of the piston from a hydraulically overflowing device, the casing has a two-part structure, A basic casing (11) containing and containing all casing side passages, valves, throttling devices (31-34) and the like, and a spring casing (12-15) containing return springs and no flow passages. This spring casing is liquid-tightly coupled to the basic casing (11), and at least connects the front hydraulic chamber (27) and the rear hydraulic chamber (28) of the basic casing. A door check, characterized in that at least one casing passage of the two casing passages is a selectively passageable casing passage or a casing passage closed by a plug, a seal or the like. 2. A basic casing, in particular, has casing passages in two oppositely located casing walls (35, 36), each casing passage having a throttle screw, throttle valve (31-34) or the like. 2. The receptacles for the housings are opposite and the one or at least one receptacle is selectively screwed with a closure or the like for interruption of the associated casing passage. Door check. 3. The basic casing (11) comprises a casing bottom (39) inserted under seal at the end remote from the spring casing (12-15), the casing bottom (39) being selected. Door check according to claim 1 or 2, characterized in that it comprises a valve unit or part of at least one casing passage. 4. The free ends of the spring casings (12-15) are
Door check according to any one of claims 1 to 3, comprising a central through hole (40) for a selectively installable spring adjustment device.