JPH0913788A - Speed controller for door closer - Google Patents

Abstract

PURPOSE: To accurately adjust the latching action starting timing of a door closer without error at a desired angular position of a door and, at the same time, to easily perform the adjusting work. CONSTITUTION: In a speed controller for door closer, an operating member 8 is rotatably and watertightly attached to the front end section of a cylinder 1 in parallel with the axial line of a release pin 7. A tool engaging section 81 is provided at the outer end of the operating member 8 and, at the same time, the section 81 is temporarily engaged with the step section 73 of the release pin 7 on the inner end side of the member 8. A reference member 9 which is used as a reference for deciding the projecting length of the pin 7 is provided so that the member 9 can slide in the length direction of the member 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved speed control device for a door closer.

[0002]

2. Description of the Related Art As a conventional speed controller for a door closer, a cylinder filled with hydraulic oil, a piston for partitioning the cylinder into a front first chamber and a rear second chamber, and a first chamber through an orifice are provided. And an oil passage that connects the second chamber with the second chamber,
A return spring that biases the piston toward the first chamber, a rack provided on the piston, a pinion that meshes with the rack, a rotation shaft that is supported by the cylinder, and on which the pinion and the linking arm are fixedly mounted; A bypass that is provided in parallel in the oil passage and connects the first chamber and the second chamber through the piston, a check valve that has a spherical valve element that is provided in the bypass at the front end of the piston, and a door closing operation In order to remove the valve body of the check valve near the end from above the valve seat, there may be mentioned a front bottom of the cylinder consisting of a release pin adjustably screwed towards the valve body, said device being for example It is disclosed and known in Japanese Utility Model Laid-Open No. 2-85780.

According to this device, the bypass check valve provided in parallel with the oil guide passage having the orifice is opened by the release pin at an appropriate angular position near the end of the closing operation of the door. Since the cushioning action of the hydraulic oil and the orifice can be eliminated, the closing speed of the door can be increased at an appropriate and safe angular position.

Therefore, the closing force of the door is strengthened at the end stage, and the door is completely closed under the smooth latching action.

[0005]

However, in the above-mentioned conventional apparatus, the operator is required to screw or unscrew the release pin depending on the relative relationship between the start timing of the latching action of the closer and the appropriate angular position of the door. By repeating the above steps, the eyes were checked to make them coincident with each other. Therefore, it is easy for variations and errors to occur in the start of the latching action at the desired angular position of the door, or it is possible to complete the adjustment with one operation. There were some problems such as difficult things that should be improved.

The speed control device for a door closer according to the present invention makes it possible to accurately adjust the start of the latching action of the closer at a desired angular position of the door without error, and the adjustment work can be surely performed by one operation. It was proposed for the purpose of making it possible.

[0007]

In order to achieve the above object, the present invention is a conventional device described above, wherein a cylindrical operating member is rotatably mounted on the front bottom portion of the cylinder in parallel with the axis of the release pin. It is mounted in a liquid-tight manner, a tool engaging portion is provided on the outer end of the operating member, and the inner end side of the operating member is temporarily engaged with a step portion provided on the distal end side of the releasing pin to release the releasing pin. Is provided so as to be slidable in the length direction of the operating member.

[0008]

In order to adjust the start position of the latching action, after the door closer is attached, the door is first placed at the angular position where the start of the latching action is desired, and the stop angular position is fixed by an appropriate stopper or the like.

Then, as shown in FIG. 1, the release pin 7 is fully outwardly screwed back, and the reference member 9 which is in the disengaged position (see FIGS. 4 and 5) with respect to the release pin 7 is removed. The operation member 8 is rotated to the engagement position (see FIG. 6) in accordance with the rotation operation, and one end of the reference member 9 is temporarily engaged with the stepped portion 73 of the release pin 7.

The rotation of the reference member 9 is carried out by rotating the operation member 8 provided with the reference member 9 with a tool such as a screwdriver fitted in the tool engaging portion 81, for example, 90 ° clockwise. Be seen.

In other words, when the operation member 8 is rotated around the axis, the reference member 9 provided on the operation member 8 so as not to be rotated is also rotated.

As shown in FIG. 2, when the release pin 7 is screwed in with a tool such as a screwdriver, the reference member 9 selectively engaged at the stepped portion 73 of the release pin 7 is released.
Move to.

Since the stepped portion 73 of the release pin 7 contacts the front end surface of the piston 2 through the reference member 9, the release pin 7 cannot be screwed any further and stops.

In this position, the release pin 7 has the valve seat 62.
It is designed so that the upper valve body 61 can be eliminated.

Next, by rotating the operating member 8 counterclockwise with a tool, the reference member 9 which rotates integrally with the operating member 8 is returned to the initial non-engaging angular position (see FIG. 5).

At this time, the reference member 9 continues to occupy the protruding state, but if the above-mentioned stopper or the like is removed and the door is once closed, the reference member 9 is pushed by the front end surface of the piston 2 and is retracted to the operating member 8 (storage position). Return to. With this, release pin 7
The setting of the appropriate protrusion length of is completed.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 to 3, reference numeral 1 is a cylinder filled with hydraulic oil, 13 is a cylinder cap forming the front bottom portion of the cylinder 1, 2 is inserted in the cylinder 1, and the cylinder 1 is located in the front first chamber 11 And the second room 1 behind
A piston 3 partitioned into 2 and 3 is a return spring for biasing the piston 2 toward the first chamber 11.

In the cylinder 1, the first chamber 11 on the high pressure side
Although not shown, the low pressure side second chamber 12 is communicated with the low pressure side second chamber 12 by an oil guide passage having an orifice interposed.

A rack 51 is provided in the piston 2 along the sliding direction thereof, and a pinion 52 is meshed with the rack 51.

A rotary shaft 53 that rotates together with the pinion 52 is fixed to the pinion 52.
To support. Also, as is well known, the rotating shaft 5
One of the linkage arms (not shown) is fixedly attached to the outer end of 3.

Reference numeral 21 is a bypass provided in the piston 2, which is provided in parallel with the oil guide passage and connects the first chamber 11 and the second chamber 12 of the cylinder 1 to each other. Code 4
Is a filter provided in the middle of the bypass 21, and 41 is a sphere for preventing the filter 4 from coming off.

A check valve 6 having a spherical valve element 61 is provided in the bypass 21 at the first chamber 11 side of the piston 2, that is, at the front end portion.

As shown in FIG. 3, the valve body 61 is located above the piston 2 in most regions except the region at the front position in the stroke of the piston 2 by the hydraulic oil in the first chamber 11 on the high pressure side. It is pressed against the valve seat 62 and is seated, and blocks the flow of hydraulic oil by the bypass 21.

In the figure, reference numeral 63 is a valve body 61 of the check valve 6.
2 shows a drop-out prevention pin fixed to the piston 2 in order to prevent the roller from rolling out from the accommodating portion of the piston.

On the other hand, on the cylinder cap of the cylinder 1, that is, on the front bottom portion 13, a release pin 7 is screwed toward the valve body 61 seated on the valve seat 62 on the piston 2.

More specifically, the releasing pin 7 has a small diameter portion 71 at the tip, an external male thread portion 72, a stepped portion 73 on the tip side which forms a boundary between the small diameter portion 71 and the male thread portion 72, and a tool attachment at the base end. The unit 74 and the like are provided.

Reference numeral 75 indicates a seal ring fitted in the annular groove of the release pin 7. A retaining ring (not shown) may be provided between the release pin 7 and the front bottom portion 13 to prevent the pin 7 from coming out.

A cylindrical operating member 8 is mounted on the front bottom portion 13 of the cylinder 1 in parallel with the axis of the release pin 7 in a rotatable and liquid-tight manner.

As a sealing means between the operating member 8 and the front bottom portion 13, for example, a seal ring 82 mounted in an annular groove of the operating member 8 can be cited. In addition, the operating member 8
A stop ring (not shown) that prevents the operation member 8 from coming off may be provided between the front bottom 13 and the front bottom 13.

A tool engaging portion 81 for engaging the tip of a tool such as a driver is provided on the outer end of the operating member 8 exposed to the outside, and a releasing member is provided on the inner end side of the operating member 8. Temporarily engages with the stepped portion 73 provided on the tip side of the pin 7,
A reference member 9 serving as a reference for determining the protruding length of the release pin 7 is provided so as to be slidable in the length direction of the operation member 8.

As shown in FIG. 7, the reference member 9 in the illustrated example has a cylindrical shaft body 91 and a reference piece 92 integral with the shaft body, and is formed into an L-shaped appearance. The body 91 is slidably inserted from the rear into a fitting hole of the operation member 8 having a cylindrical shape.

In FIG. 8, reference numeral 93 is an operating member 8.
It is a passage for allowing the working oil on the inner side to escape in the fitting hole, and is formed by cutting a part of the shaft body 91 of the reference member 9.

The members 8 and 9 are connected to each other by an engaging means 80 composed of a pin and a long groove, and the reference member 9 is slidable with respect to the operating member 8 in the longitudinal direction of the shaft 91. However, it cannot rotate around the shaft 91.

However, as shown in FIGS. 4 to 6, a tool such as a driver is used to move the operation member 8 from the normal position indicated by the symbol "N" to the operation position indicated by the symbol "S", for example, 90 ° clockwise.
When turned (see FIG. 4), the reference member 9 turns with the operation member 8 by the same angle. In other words, the reference piece 92 is rotationally displaced from the angular position of FIG. 5 to the angular position of FIG. The tip of 92 can temporarily and selectively engage with the stepped portion 73 of the release pin 7.

In FIGS. 5 and 6, reference numeral 14 is a counterbore (recess) formed on the inward surface of the cylinder cap 13 in correspondence with the thickness of the reference piece 92 of the reference member 9.

A click means is provided between the operating member 8 and the inner bottom portion 13 of the cylinder 1 to which the operating member 8 is fitted so that the operator can reliably detect the normal position "N" and the operating position "S". It is good to provide.

Needless to say, the conventional setting of the start timing of the latching action without using the operation member 8 can be used together.

[0038]

According to the speed control device for a door closer of the present invention described above, regarding the start of the latching action of the closer at the desired angular position when the door is closed,
Not only can it be adjusted accurately without error, but the adjustment work can be performed reliably with a single operation.

[Brief description of the drawings]

FIG. 1 is a vertical partial plan view showing an embodiment of the present invention in a state of a front stage of an adjusting work.

FIG. 2 is a plan view of a vertical section of the latter part of the adjustment work.

3 is a vertical partial plan view showing the adjusted embodiment of FIG. 1 during a door closing operation.

FIG. 4 is a front view of the cylinder cap removed from the embodiment, showing a normal state.

FIG. 5 is a rear view of the cylinder cap removed from the embodiment, showing a normal state.

FIG. 6 is a rear view of the cylinder cap removed from the embodiment, showing an adjusting operation process.

FIG. 7 is a side view of the reference member removed from the embodiment.

FIG. 8 is an enlarged cross-sectional view showing an assembled state of the operation member and the reference member.

[Explanation of symbols]

 1 Cylinder 11 1st chamber 12 2nd chamber 13 Front bottom part 2 Piston 21 Bypass 3 Return spring 51 Rack 52 Pinion 53 Rotating shaft 6 Backflow prevention valve 61 Valve body 62 Valve seat 7 Release pin 73 Step part 8 Operating member 81 Tool attachment Part 9 Reference member

Claims (1)

[Claims] 1. A cylinder in which hydraulic oil is sealed, a piston for partitioning the cylinder into a front first chamber and a rear second chamber, and a guide in which the first chamber and the second chamber communicate with each other through an orifice. An oil passage, a return spring that biases the piston toward the first chamber, a rack provided on the piston, a pinion that meshes with the rack, and a rotating shaft that is supported by the cylinder and that fixes the pinion and the linkage arm. , A bypass provided in parallel in the oil guide passage and connecting the first chamber and the second chamber through a piston, a check valve having a spherical valve element provided in the bypass at the front end of the piston, and a door In order to remove the valve body of the check valve from above the valve seat near the end of the closing operation, in the speed control device of the door closer, which comprises a release pin adjustably screwed toward the valve body at the front bottom of the cylinder, Front bottom A cylindrical operation member is rotatably and liquid-tightly attached to the portion in parallel with the axis of the release pin, a tool engaging portion is provided at the outer end of the operation member, and an inner end side of the operation member is provided. A reference member, which is temporarily engaged with a step portion provided on the tip side of the release pin and serves as a reference for determining the protruding length of the release pin, is provided slidably in the longitudinal direction of the operation member. Door closer speed control device.