JP6959815B2 - Door closer with stop mechanism - Google Patents

Description

The present invention relates to a door closer with a stop mechanism.

Conventionally, a door closer provided with a stop mechanism has been known. For example, in Patent Document 1 below, a rack of a piston, which is built by urging a cylinder with an elastic force of a spring as a door closing force, meshes with a pinion pivotally supported on the cylinder side, and the end teeth of the rack and the outer periphery of the pinion rub against each other. An interior stop type door closer that is engaged and held open is disclosed. In this interior stop type door closer, a check valve is provided to communicate the pinion chamber in which the pinion is installed with the piston head and the cylinder hydraulic chamber, and the inner wall surface of the cylinder is directed from the pinion chamber to the spring chamber in which the spring is installed. , An oil passage is provided appropriately shorter than the maximum sliding stroke of the piston, and the oil passage is shut off before the outer circumference of the pinion and the end teeth are frictionally engaged. The structure is adopted so that it flows into the pinion room. According to Patent Document 1 below, in this interior stop type door closer, only the stop input can be increased by controlling the piston operation at the time of opening the door by the spring load and the hydraulic pressure, so that the door is unwillingly opened. It is said that the effect of preventing the vehicle from being stopped can be obtained.

Jikken Sho 62-21646

However, since various states are assumed for the door opening / closing operation, there is room for improvement in the conventional door closer with a stop mechanism represented by the above-mentioned Patent Document 1. For example, when the door is closed, the timing at which the door shifts from the stop section to the speed adjustment section, that is, the timing at which the piston teeth of the piston and the pinion teeth of the pinion mesh with each other, is assumed, and the door is vigorously closed at this timing. If the moving speed of the pinion becomes faster than the moving speed of the pinion, in the door closer with a stop mechanism according to the prior art, the piston teeth and the pinion teeth do not mesh well and the pinion teeth ride on the piston teeth, causing a problem. There was a problem that it would end up.

The present invention has been made in view of the problems existing in the prior art, and an object of the present invention is that no matter what external force is applied to the door when opening and closing the door, there is a problem due to the pinion teeth riding on the door. It is an object of the present invention to provide a door closer with a stop mechanism which can suitably exert a function as a door closer without occurring.

Hereinafter, the present invention will be described. Reference numbers in the accompanying drawings are added in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

The door closer (10) with a stop mechanism according to the present invention includes a housing (11) including a piston chamber (13), a pinion chamber (14) communicating with the piston chamber (13), and the piston chamber (13). The piston is arranged so as to be divided into a spring chamber (13a) and a pressure oil chamber (13b), and the elastic force of the spring (15) arranged in the spring chamber (13a) is urged as a door closing force. A piston (21) slidably arranged in the chamber (13) and a pinion shaft (32) pivotally supported by the housing (11) are rotatably arranged in the pinion chamber (14). The piston teeth (23) are formed on the outer peripheral surface of the piston (21), and the outer peripheral surface of the pinion (31) meshes with the piston teeth (23). An outer peripheral portion (34) in which a gear for frictional engagement is not formed is formed on the pinion tooth (33) and the terminal tooth of the piston tooth (23), and the spring chamber (21) is formed in the piston (21). An oil passage hole (24) for communicating the 13a) and the oil pressure chamber (13b) is formed, and the piston (21) is located on the oil pressure chamber (13b) side in the oil passage hole (24). When the piston (21) slides to the spring chamber (13a) side, the flow of oil in the oil passage hole (24) is stopped. A check valve (25) that allows flow is formed, and the housing (11) is braked so that the pressure oil chamber (13b) and the pinion chamber (14) are communicated with each other via a hydraulic pressure regulating valve (42). A flow path (41) is formed, and when the piston tooth (23) and the pinion tooth (33) mesh with each other, the opening / closing operation of the door connected to the pinion shaft (32) can be executed, and the piston tooth (23) can be opened and closed. A door closer (10) with a stop mechanism that maintains the open state of the door when the end teeth of the 23) and the outer peripheral portion (34) are stopped by frictional engagement, and the hydraulic pressure in the braking flow path (41). In the flow path on the pinion chamber (14) side with respect to the adjustment valve (42) installation position, the piston chamber (13) and the braking flow path (41) do not pass through the hydraulic adjustment valve (42). A non-braking flow path (43) for communication is formed, and when the door is opened to the fully open state, the end teeth of the piston teeth (23) and the outer peripheral portion (34) are in a state where the friction engagement is stopped. The open state of the door is maintained, and the piston (21) is absent when the frictional engagement is stopped. When the braking flow path (43) is not blocked and the closing operation is started by applying a force in the closing direction to the open door when the friction engagement is stopped, the friction engagement stop is released and the said. It is characterized in that the piston (21) is configured to block the non-braking flow path (43) at the timing when the terminal tooth of the piston tooth (23) and the pinion tooth (33) mesh with each other. be.

Further, in the door closer (10) with a stop mechanism according to the present invention, it is preferable that the piston tooth (23) and the pinion tooth (33) have a tooth profile in which curved surfaces mesh with each other and come into contact with each other. be.

According to the present invention, no matter what kind of external force is applied to the door when opening and closing the door, the stop mechanism can suitably exhibit the function as a door closer without causing a problem due to the pinion teeth riding on it. A door closer with a door can be provided.

It is a figure for demonstrating the main structure of the door closer with a stop mechanism which concerns on this Embodiment, the sectional drawing (a) in the figure shows the cross section of the whole apparatus, and the sectional drawing (b) is the main part of the apparatus. Therefore, the cross section is shown at an angle different from that shown in the fraction (a). It is a figure for demonstrating the main structure of the door closer with a stop mechanism which concerns on the prior art for demonstrating in comparison with the door closer with a stop mechanism which concerns on this embodiment, and the sectional view (a) in the figure is the cross section of the whole apparatus. (B) shows the main part of the device and shows a cross section at an angle different from that of the segment (a). It is a figure which shows the cross-sectional shape of the piston provided in each door closer with a stop mechanism shown in FIG. 1 and FIG. Shows the piston of. It is a figure for demonstrating the operation of the door closer with a stop mechanism which concerns on this embodiment. It is a figure for demonstrating the operation state of the piston tooth and the pinion tooth of each of the door closer with a stop mechanism which concerns on this embodiment and the door closer with a stop mechanism which concerns on a prior art. It is a figure for demonstrating the improved form of the tooth profile of a piston tooth and a pinion tooth which were carried out in the door closer with a stop mechanism which concerns on this Embodiment, and the sectional drawing (a) in the figure shows the prior art for the comparative explanation. , Subdivision (b) shows the improved embodiment. It is a figure which shows various modifications applicable to this invention.

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

FIG. 1 is a diagram for explaining a main configuration of a door closer with a stop mechanism according to the present embodiment. In the figure, the sectional view (a) shows a cross section of the entire apparatus, and the sectional view (b) shows the apparatus. It is a main part of the above and shows a cross section at an angle different from that of the segment (a). Further, FIG. 2 is a diagram for explaining a main configuration of a door closer with a stop mechanism according to a conventional technique for contrasting with a door closer with a stop mechanism according to the present embodiment, and is a diagram (a) in the drawing. Shows the cross section of the entire device, and the segment (b) shows the cross section of the main part of the apparatus at an angle different from that of the segment (a). Further, FIG. 3 is a diagram showing a cross-sectional shape of a piston included in each door closer with a stop mechanism shown in FIGS. 1 and 2. FIG. (B) shows the piston of the prior art.

As shown in FIG. 1, the door closer 10 with a stop mechanism according to the present embodiment includes a housing 11 having a substantially cubic shape forming an outer shell shape. The housing 11 has a space in which hydraulic oil can be filled by fitting the plugs 12 at both ends. This space is composed of a piston chamber 13 in which the piston 21 is arranged in a slidable state and a pinion chamber 14 in which the pinion 31 is arranged in a rotatable state. Further, the piston chamber 13 and the pinion chamber 14 are configured to communicate with each other.

The piston 21 arranged in the piston chamber 13 is arranged so as to divide the piston chamber 13 into a spring chamber 13a and a pressure oil chamber 13b, and is in a slidable state in the piston chamber 13 so that the spring chamber 13 can be slidable. The sizes of 13a and the pressure oil chamber 13b can be changed. Further, since the spring 15 that exerts an elastic force on the piston 21 is arranged in the spring chamber 13a, the piston 21 according to the present embodiment exerts the elastic force of the spring 15 arranged in the spring chamber 13a. By receiving it, it is configured to always receive an urging force from the spring 15 in the direction of narrowing the pressure oil chamber 13b. This urging force acts as a door closing force.

The pinion 31 arranged in the pinion chamber 14 is attached to a pinion shaft 32 pivotally supported by the housing 11 and is rotatably arranged in the pinion chamber 14.

The piston 21 according to the present embodiment has piston teeth 23 formed on the outer peripheral surface of the portion facing the pinion 31. On the other hand, on the outer peripheral surface of the pinion 31, a pinion tooth 33 that meshes with the piston tooth 23 and an outer peripheral portion 34 that does not have a gear that is frictionally engaged with the piston tooth 23 are formed. Although the operation of these members will be described later, in the door closer 10 with a stop mechanism according to the present embodiment, when the piston teeth 23 and the pinion teeth 33 mesh with each other, the door closer connected to the pinion shaft 32 can be opened and closed. The open state of the door is maintained when the piston teeth 23 and the outer peripheral portion 34 are stopped from frictional engagement.

Further, as a configuration provided in the door closer 10 with a stop mechanism according to the present embodiment, the piston 21 according to the present embodiment is formed with an oil passage hole 24 for communicating the spring chamber 13a and the oil pressure chamber 13b, and the oil passage hole 24 is formed. In the oil passage hole 24, when the piston 21 slides to the pressure oil chamber 13b side, the flow of oil in the oil passage hole 24 is stopped, and when the piston 21 slides to the spring chamber 13a side, the oil passage hole 24 A check valve 25 is formed to allow the flow of oil. Therefore, when the piston 21 slides in the direction of narrowing the oil pressure chamber 13b, the check valve 25 stops the flow of oil in the oil passage hole 24, so that the piston 21 is filled in the oil pressure chamber 13b. On the contrary, when the piston 21 slides in the direction of narrowing the spring chamber 13a, the check valve 25 allows the oil to flow through the oil passage hole 24, so that the piston 21 receives the oil pressure of the hydraulic oil. The state is not affected by the hydraulic pressure of the hydraulic oil filled in the spring chamber 13a and the pressure oil chamber 13b.

Further, in the door closer 10 with a stop mechanism according to the present embodiment, as shown in FIG. 1 (b), the pressure oil chamber 13b and the pinion chamber 14 are communicated with the housing 11 via the hydraulic control valve 42. A braking flow path 41 is formed. The braking flow path 41 includes a first braking flow path 41a communicating with the oil pressure chamber 13b, a second braking flow path 41b communicating with the pinion chamber 14, a first braking flow path 41a, and a second braking flow path 41b. It is composed of a hydraulic control valve 42 arranged between the two. The presence of the braking flow path 41 makes it possible to adjust the speed when the door opens and closes. That is, the opening / closing speed of the door can be arbitrarily controlled by adjusting the valve opening degree of the hydraulic control valve 42 that forms a part of the braking flow path 41.

The configuration of the door closer 10 with a stop mechanism according to the present embodiment described above is the same as the configuration provided for the door closer 100 with a stop mechanism according to the prior art shown in FIG. 2, but the door closer with a stop mechanism according to the present embodiment. Reference numeral 10 has a significant configuration that did not exist in the prior art. Explaining such a significant configuration with reference to FIG. 1B, the door closer 10 with a stop mechanism according to the present embodiment has a pinion chamber 14 with respect to the position where the hydraulic control valve 42 is installed in the braking flow path 41 described above. A non-braking flow path 43 for communicating the piston chamber 13 and the braking flow path 41 is provided in the flow path on the side. The non-braking flow path 43 is arranged at a position where the piston 21 closes the non-braking flow path 43 at the timing when the piston teeth 23 and the pinion teeth 33 mesh with each other when the door is closed. Therefore, when the non-braking flow path 43 is not blocked by the piston 21, the pressure oil chamber 13b, the pinion chamber 14, and the spring chamber 13a are in a conductive state due to the presence of the non-braking flow path 43. The piston 21, which receives elastic force from the spring 15, is in a non-braking state where it does not receive the oil pressure from the hydraulic oil, and slides and moves in the direction of narrowing the pressure oil chamber 13b.

Then, when the piston 21 moves from the above-mentioned state and the non-braking flow path 43 is blocked, the sliding movement of the piston 21 is speed-adjusted by the braking flow path 41 under a predetermined speed condition. At this time, the non-braking flow path 43 according to the present embodiment is arranged at a position where the piston 21 closes the non-braking flow path 43 at the timing when the piston teeth 23 and the pinion teeth 33 mesh with each other when the door is closed. Even if the pinion 31 rotates at high speed due to an external force in the direction of suddenly closing the door, the piston tooth 23 preferably meshes with the pinion tooth 33 immediately before the timing at which the piston tooth 23 and the pinion tooth 33 mesh with each other. Since it has been moved to a position where it can be used, it is possible to avoid a situation in which a problem occurs when the pinion tooth 33 rides on the piston tooth 23 as in the prior art.

As shown in comparison with FIG. 3, in the piston 21 of the present embodiment and the piston 121 of the prior art, the positions of the enlarged diameter portions 21a and 121a for closing the non-braking flow path 43 and the braking flow path 41 are located. It has been changed. In the piston 21 according to the present embodiment, the non-braking flow path 43 and the enlarged diameter portion are positioned so that the piston 21 closes the non-braking flow path 43 at the timing when the piston tooth 23 and the pinion tooth 33 mesh with each other when the door is closed. Since the arrangement configuration with the 21a is adjusted, the piston teeth 23 and the pinion teeth 33 can be suitably engaged with each other regardless of any external force applied to the door when opening and closing the door.

The characteristic configuration of the door closer 10 with a stop mechanism according to this embodiment has been described above. Next, by adding FIGS. 4 and 5 to the reference drawings, the operation of the door closer 10 with a stop mechanism according to the present embodiment will be described. Here, FIG. 4 is a diagram for explaining the operation of the door closer with a stop mechanism according to the present embodiment, and FIG. 5 is a diagram showing the door closer with a stop mechanism according to the present embodiment and the door closer with a stop mechanism according to the prior art, respectively. It is a figure for demonstrating the operation state of a piston tooth and a pinion tooth of.

First, when the door opening / closing operation is executed, the pinion shaft 32 connected to the door rotates in conjunction with the door opening / closing operation. Then, when the door is opened, the pinion shaft 32 rotates in the counterclockwise direction with respect to the paper surfaces of FIGS. 1 and 4. Then, when the door is opened to the fully open state, the piston teeth 23 of the piston 21 and the outer peripheral portion 34 of the pinion 31 are in a state of frictional engagement as shown in the minute diagram (a) in FIG. The door is kept open by the action of this frictional engagement (at the time of stop).

When a force is applied to the door in the direction of closing the door from the state shown in FIG. 4A showing the stop time, the door closing operation is started. At this time, the pinion shaft 32 connected to the door rotates in the clockwise direction with respect to the paper surfaces of FIGS. 1 and 4. Note that FIG. 4B shows the state immediately before the stop is released.

Here, when an external force is applied to the door in the state immediately before the stop release shown in FIG. 4 (b) in the direction of suddenly closing the door and the pinion 31 rotates at high speed, in the prior art, FIG. 4 (c) Further, as shown in FIG. 5A, there is a possibility that the pinion tooth 33 rides on the piston tooth 23, causing a problem such as the tooth being chipped. However, as shown in FIG. 1, a non-braking flow path 43 is formed in the present embodiment, and in this non-braking flow path 43, the piston 21 is non-braking at the timing when the piston tooth 23 and the pinion tooth 33 mesh with each other when the door is closed. Since it is arranged so as to block the flow path 43, even if an external force in the direction of suddenly closing the door is applied and the pinion 31 rotates at high speed, the piston teeth 23 and the pinion teeth 33 mesh with each other. Immediately before the timing, as shown in FIGS. 4 (d) and 5 (b), the piston tooth 23 has moved to a position where it can be suitably engaged with the pinion tooth 33. Therefore, according to the door closer 10 with a stop mechanism according to the present embodiment, it is possible to suitably avoid a situation in which a problem occurs due to the pinion teeth 33 riding on the piston teeth 23 as in the prior art.

In the door closer 10 with a stop mechanism according to the present embodiment, the tooth profiles of the piston teeth 23 and the pinion teeth 33 that are in mesh with each other are also improved. The content of the improvement is shown in FIG. Here, FIG. 6 is a diagram for explaining an improved form of the tooth profile of the piston tooth and the pinion tooth implemented in the door closer with a stop mechanism according to the present embodiment, and the fractional diagram (a) in the figure is a comparative explanation. The prior art for is shown and the segmentation (b) shows the improved embodiment.

That is, in the prior art, the contact points between the piston teeth 23 and the pinion teeth 33 that are in mesh contact, for example, the contact points of the piston teeth 23 are convex, so that point contact occurs at the time of mesh contact, and the load on each tooth is large. Therefore, there is a risk that the life of the teeth will be shortened. However, as shown by the reference numeral α in FIG. 6B, by forming the contact portion of the piston tooth 23 into a curved surface shape, the piston tooth 23 and the pinion tooth 33 have a tooth profile in which the curved surfaces are in mesh with each other. Therefore, the contact load is reduced and the life of the tooth can be extended. By adopting such a configuration, it is possible to provide a door closer 10 with a stop mechanism that can suitably exert a function as a door closer without causing a problem due to the pinion teeth riding on it.

Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be made to the above embodiments.

For example, in the above-described embodiment, the configuration in which the non-braking flow path 43 is formed with respect to the housing 11 in order to put the piston 21 in a non-braking state that does not receive the hydraulic pressure from the hydraulic oil has been described. The non-braking flow path 43 according to the present embodiment is arranged at a position where the piston 21 closes the non-braking flow path 43 at the timing when the piston teeth 23 and the pinion teeth 33 mesh with each other when the door is closed. It had the characteristics of. However, as long as the scope of the present invention is a form capable of exerting the same action and effect as the non-braking flow path 43, another form can be adopted. For example, FIG. 7 is a diagram showing various modifications applicable to the present invention, but as shown in FIG. 7, there is no braking flow path 43 according to the above-described embodiment in the piston chamber 13. By forming the braking oil passage groove 53, it is possible to realize the same operation and action effect as those in the above-described embodiment.

It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

10 Door closer with stop mechanism, 11 housing, 12 plugs, 13 piston chamber, 13a spring chamber, 13b oil pressure chamber, 14 pinion chamber, 15 spring, 21 piston, 21a enlarged diameter part, 23 piston teeth, 24 oil passage holes, 25 Check valve, 31 pinion, 32 pinion shaft, 33 pinion teeth, 34 outer circumference, 41 braking flow path, 41a first braking flow path, 41b second braking flow path, 42 hydraulic control valve, 43 non-braking flow path, 53 Non-brake oil passage groove, 100 Door closer with stop mechanism according to the prior art, 121 piston, 121a enlarged diameter part.

Claims (2)

A housing including a piston chamber and a pinion chamber communicating with the piston chamber,
The piston chamber is arranged so as to be divided into a spring chamber and a pressure oil chamber, and the elastic force of the spring arranged in the spring chamber is urged as a door closing force and slidably arranged in the piston chamber. With the piston
A pinion attached to a pinion shaft pivotally supported by the housing and rotatably arranged in the pinion chamber,
With
Piston teeth are formed on the outer peripheral surface of the piston, and gears that are frictionally engaged with the pinion teeth that mesh with the piston teeth and the terminal teeth of the piston teeth are not formed on the outer peripheral surface of the pinion. The part is formed,
The piston is formed with an oil passage hole for communicating the spring chamber and the oil pressure chamber, and the oil passage hole is used when the piston slides toward the oil pressure chamber. When the oil flow in the hole is stopped and the piston slides to the spring chamber side, a check valve is formed to allow the oil flow in the oil passage hole.
The housing is formed with a braking flow path that allows the pressure oil chamber and the pinion chamber to communicate with each other via a hydraulic control valve.
When the piston tooth and the pinion tooth mesh with each other, the opening / closing operation of the door connected to the pinion shaft can be executed, and when the end tooth of the piston tooth and the outer peripheral portion stop frictional engagement, the open state of the door is opened. A door closer with a stop mechanism that is held
A non-braking flow path is formed in the flow path on the pinion chamber side with respect to the position where the hydraulic control valve is installed in the braking flow path so that the piston chamber and the braking flow path communicate with each other without the hydraulic adjustment valve. Has been done
When the door is opened to the fully open state, the end teeth of the piston teeth and the outer peripheral portion are in a state where the frictional engagement is stopped, and the open state of the door is maintained.
When the frictional engagement is stopped, the piston does not block the non-braking flow path, and the piston does not block the non-braking flow path.
When the closing operation is started by applying a force in the closing direction to the open door when the frictional engagement is stopped, the frictional engagement is released and the terminal teeth of the piston teeth and the pinion teeth are brought into contact with each other. A door closer with a stop mechanism, characterized in that the piston is configured to block the non-braking flow path at the timing of meshing. In the door closer with a stop mechanism according to claim 1.
A door closer with a stop mechanism, wherein the piston tooth and the pinion tooth have a tooth profile in which curved surfaces mesh with each other and come into contact with each other.

Images