JPH0719557U - Door closing speed adjustment mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The door closing speed can be freely adjusted by a simple operation. [Structure] By directly rotating the cap body 1 by hand, the speed governing rod 2 engaging with the cap body 1 is also rotated.
Thereby, the closing speed can be easily adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a door closer that can adjust the closing speed of the door (hereinafter referred to as the closing speed) by the oil pressure of the damper oil, and in particular, the door closing can be performed according to the ambient temperature change by a simple operation from the outside. The present invention relates to a door closing speed adjusting mechanism for a door closer that can keep the speed substantially constant.

[0002]

[Prior art]

 Conventionally, as this type of door closer, for example, one shown in FIG. 2 is known.

In this door closer, an upper hinge cylinder 101 having an upper hinge blade 100 and a lower hinge cylinder 103 having a lower hinge blade 102 are coaxially arranged adjacent to each other. The protruding portion of the rotary shaft 104 provided so as to protrude from the upper hinge cylinder 101 is located inside the lower hinge cylinder 103 and is rotatably mounted via the bearing 105. A piston 106 is mounted by spline-engaging with the protruding portion of the rotary shaft 104 and screwed into the inner wall of the lower hinge tubular body 103.

A speed control passage 108 and a valve passage 109 are formed in the bottom wall of the sliding hole 107 of the piston 106, and a tapered portion 111 of a speed control rod 110 is penetrated into the speed control passage 108 to form a valve passage 109. A check valve 112 is attached to the. A damper oil 115 is enclosed in a first damper chamber 113 and a second damper chamber 114, which are sliding holes 107 formed by sandwiching such a bottom wall, and the dampers of the first damper chamber 113 and the second damper chamber 114 are enclosed. The moving flow rate of the oil 115 is limited to control the closing speed.

When the upper hinge cylinder 101 is rotated in the door opening direction, the piston 106 screwed in the lower hinge cylinder 103 moves upward and the damper oil 115 in the sliding hole 107 is non-returned. The valve 112 is opened and the gas flows into the first damper chamber 113.

Next, when the upper hinge cylinder 101 is rotated in the closing direction by the urging force of the spring, the piston 106 screwed to the lower hinge cylinder 103 moves downward and the first damper chamber 113 is reduced. To do. As a result, the check valve 112 closes the valve passage 109, so that the damper oil 115 in the first damper chamber 113 flows into the second damper chamber 114 through the speed regulating passage 108 controlled by the speed regulating rod 110. .

Since the area of the damper oil passage of the speed control passage 108 is gradually narrowed as the piston 106 moves downward, the moving flow rate of the damper oil 115 decreases and the piston 106 moves downward. Limited. In this way, the rotation speed of the upper hinge cylinder 101 in the door closing direction, that is, the door closing speed is limited.

By the way, in the door closer having such a configuration, it is possible to freely operate the door closing speed by operating and setting it according to the place where the speed governor is installed and the preference of the user. Therefore, the governor rod is operated and set at the time of shipment or at the time of installation.

[0009]

[Problems to be solved by the device]

 However, in a door closer having such a configuration, the viscosity characteristics of the damper oil that adjusts the closing speed change subtly with temperature.For example, the damper oil escapes through the speed control passage because it has a low viscosity at high temperatures in summer. There is a phenomenon that the speed increases, and as a result, the closing speed also increases. On the contrary, when the temperature is low in winter, the damper oil becomes highly viscous, the inflow speed slows down, and the door closing speed is delayed.Therefore, there is an annual change in the door closing speed, so how to prevent this change is an important issue. Has become.

Therefore, for example, it is possible to remove the cap of the upper hinge cylinder, insert a driver or the like into the inside, and operate a speed control rod such as a tip at any time to adjust according to the season. It is a problem that it is annoying to perform such an operation, and in reality it is left unattended, which is a problem.

In view of the above problems, it is an object of the present invention to provide a door closing speed adjusting mechanism for a door closer that can freely adjust the door closing speed by a simple operation.

[0012]

[Means for Solving the Problems]

 In other words, this invention has a lower hinge cylinder body in which damper oil is enclosed in an internal damper chamber, a bearing attached to the lower hinge cylinder body, and a rotation member which is rotatably inserted into the bearing and rotates together with the upper hinge cylinder body. Of the damper oil passing through the speed-adjusting passage provided on the piston side, and the piston that is spline-engaged with the shaft and the tip end side of the rotating shaft that is inserted into the lower hinge cylinder and is screwed into the lower hinge cylinder. A door closer having a speed regulating rod for limiting the flow rate and adjusting a closing speed by rotating the speed regulating rod, wherein an engaging means is provided between the cap body fitted to the upper hinge cylinder and the speed regulating rod. The speed control rod is also rotated by rotating the cap body to adjust the closing speed.

[0013]

[Action]

 In this invention, by directly rotating the cap body by hand, the speed regulating rod engaged with the cap body is also rotated, whereby the door closing speed can be easily adjusted.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a door closer having a door closing speed adjusting mechanism for a door closer according to the present invention. In this door closing speed adjusting mechanism, a cap body 1 and a speed governing rod 2 rotate integrally in a circumferential direction. It is connected. In FIG. 1, the same members as those of the conventional door closer shown in FIG. 2 are designated by the same reference numerals to avoid redundant description.

The cap body 1 is adapted to be fitted into the upper hinge cylinder body 101 from above, and a twill pattern 1A is engraved on the outer peripheral surface of the upper body so as not to slip when being rotated by a finger. . In addition, a fitting hole 1B having a substantially D-shaped cross section is formed in the protruding lower portion of the cap body 1 for engaging with the head portion of the speed governing rod 2.

The speed control rod 2 has a head formed in a D-shape, engages with the fitting hole 1B of the cap body 1, and rotates in the circumferential direction in conjunction with the rotational movement of the cap body 1 in the circumferential direction. The area of the speed control passage 108 can be freely changed by moving and vertically displacing with respect to the rotating shaft 104 to be screwed.

In this embodiment, the cap body and the speed governing rod are fitted to each other in a D-shaped cross section. However, the present invention is not limited to this, and various engagement modes, For example, serration engagement or the like can be applied.

[0018]

[Effect of device]

 As described above, according to the present invention, even if the closing speed of the door changes due to a change in the temperature, for example, the cap body can be rotated with a finger from outside to make an appropriate adjustment. The door closing speed can be adjusted to provide a high value-added door closer.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a door closer having a door closing speed adjusting mechanism according to the present invention.

FIG. 2 is a sectional view showing a conventional door closer.

[Explanation of symbols]

 1 cap body 2 speed control rod

Claims (1)

[Scope of utility model registration request] 1. A lower hinge cylinder body in which damper oil is sealed in an internal damper chamber, a bearing mounted on the lower hinge cylinder body, and a rotating shaft which is rotatably inserted in the bearing and rotates together with the upper hinge cylinder body. , A piston that is spline-engaged with the tip side of the rotating shaft inserted in the lower hinge cylinder and is screwed into the lower hinge cylinder, and the flow rate of damper oil that passes through the speed control passage provided on the piston side is limited. In a door closer that adjusts the closing speed by rotating the speed governor rod, the speed adjusting rod is provided between the cap body fitted to the upper hinge cylinder and the speed governing rod screwed to the rotary shaft. A door closing speed adjusting mechanism for a door closer, characterized in that engaging means is provided, and a speed adjusting rod is also rotated by rotating a cap body to adjust a door closing speed.