JP7246607B2 - floor hinge - Google Patents

Description

The present invention relates to floor hinges.

2. Description of the Related Art Conventionally, as a type of door closer, there has been known a floor hinge that rotatably supports a door installed in an opening of a building from the floor while being biased in a closing direction of the opening. This floor hinge is used by being embedded in the floor surface of an opening of a building. and a hinge case rotatably supported in a biased state. Hydraulic oil is stored inside the hinge case, and by adjusting the flow rate of the hydraulic oil, the rotational biasing force on the rotating shaft due to the rotational energy based on the elastic force stored in the compression coil spring when the door is opened is reduced. An adjustment mechanism is provided.

By the way, conventionally, various improvement techniques have been added to door closers. For example, a door closer disclosed in Patent Document 1 below discloses a structure in which sponge rubber, which is an expansion absorbing member, is housed in an oil chamber in a body housing.

This sponge rubber has a closed cell structure, and is configured so that when the working oil in the oil chamber expands due to temperature rise, the air in each cell is compressed and the volume shrinks. That is, expansion of the hydraulic oil due to temperature rise is absorbed by the volumetric change of the sponge rubber, so that the internal pressure of the oil chamber increases, preventing oil leakage from the body housing. It should be noted that the sponge rubber whose volume is shrunk due to temperature rise returns to its original volume when the working oil returns to room temperature.

Japanese Patent No. 5940033

As described above, it is well known that a mechanism that absorbs the expansion of hydraulic oil due to temperature rise and prevents troubles such as oil leakage by installing sponge rubber in the oil chamber is installed in the door closer. However, when applied to a floor hinge with a general structure, a cam for driving the piston, a sliding plate, a coil spring, a connecting rod inserted inside the coil spring, etc. are arranged inside the hinge case. Therefore, it was difficult to newly install sponge rubber as an expansion absorbing member.

As a method for solving such a problem, for example, as described in the above-mentioned Patent Document 1, a housing space for installing the sponge rubber is newly provided in the main body housing, or mounting means for the sponge rubber (for example, a pin and a washer) It is conceivable to newly provide a retaining means consisting of a device, etc., but in any case, this will lead to an increase in the size of the device and an increase in the number of parts, and furthermore, it will also cause deterioration in the ease of assembly. However, there has been no technique for installing sponge rubber, which is an expansion absorbing member, on floor hinges without increasing manufacturing costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems existing in the prior art. Another object of the present invention is to provide a floor hinge having a new configuration that enables installation of sponge rubber, which is an expansion absorbing member, on the floor hinge.

The present invention will be described below. In order to facilitate understanding of the present invention, the reference numbers of the attached drawings are added in parentheses, but the present invention is not limited to the illustrated forms.

A floor hinge (10) according to the present invention includes a hinge case (11) having an oil chamber (12) filled with hydraulic oil, and a hinge case (11) arranged at one end side of the hinge case (11) and connected to a door. A rotary shaft (14) that rotates with the opening and closing of the door, a cam member (15) that is fixedly installed on the rotary shaft (14), and a cam follower that is arranged so as to be in slidable contact with the cam member (15). A slide plate (17) that reciprocates in the hinge case (11) with the rotational movement of the cam member (15) by providing (16), and a rod member (18) connected to the slide plate (17). ) is installed at the end of the rod member (18) opposite to the slide plate (17) connection side, and the oil chamber (12) is divided into a first oil chamber (12a) and a second oil chamber (12a). A piston member (19) which is divided into two parts (12b) and is installed so as to reciprocate within the oil chamber (12); (31) and by adjusting the amount of hydraulic oil transferred between the first oil chamber (12a) and the second oil chamber (12b) accompanying the reciprocating movement of the piston member (19). A floor hinge (10) comprising a control mechanism (11b, 11c, 11d, 20) for controlling the moving speed of a piston member (19), thereby controlling the opening speed or closing speed of the door, The rod member (18) is provided with an expansion absorbing member accommodating portion (18a), and an expansion absorbing member (18b) is accommodated and installed in the expansion absorbing member accommodating portion (18a). is.

Further, in the floor hinge (10) according to the present invention, the expansion absorbing member accommodating portion (18a) can be formed as a bottomed concave portion extending in the axial direction of the rod member (18).

Further, in the floor hinge (10) according to the present invention, the expansion-absorbing member accommodating portion (18a) can be formed as a bottomless through hole extending in the axial direction of the rod member (18).

Further, in the floor hinge (10) according to the present invention, the expansion absorbing member accommodating portion (18a) is formed so as to open on the bottom side of the rod member (18) in the installed state of the floor hinge (10). is preferred.

According to the present invention, it is possible to install sponge rubber, which is an expansion absorbing member, on the floor hinge without increasing the size of the device, increasing the number of parts, and increasing the manufacturing cost due to deterioration of assembly. It is possible to provide a floor hinge with such a structure.

It is a figure which shows the external appearance shape of the floor hinge which concerns on this embodiment, the part figure (a) in the figure shows the top view of a floor hinge, and the part figure (b) has shown the side view. FIG. 2 is a diagram for explaining a specific configuration of the floor hinge according to the present embodiment, in which the partial view (a) in the figure shows the AA cross section in FIG. 1, and the partial view (b) shows the B in FIG. -B section is shown. FIG. 2 is a cross-sectional view taken along the line CC in FIG. 1, and is a vertical cross-sectional view showing characteristic portions of the rod member according to the present embodiment. It is a figure which shows the rod member which concerns on this embodiment, Comprising: The part view (a) in a figure is a partial cross-sectional side view of a rod member, and the part view (b) is a bottom view of a rod member.

Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. In addition, 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 solution of the invention. .

First, the basic configuration of a floor hinge 10 according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. Here, FIG. 1 is a view showing the external shape of the floor hinge according to the present embodiment, in which part view (a) shows a top view of the floor hinge and part view (b) shows a side view. ing. In addition, FIG. 2 is a diagram for explaining the specific configuration of the floor hinge according to the present embodiment, in which the part (a) in the figure shows the AA cross section in FIG. 1 and the part (b) ) shows the BB section in FIG. FIG. 2 is a diagram showing the state of the floor hinge 10 when the door is fully closed.

A floor hinge 10 according to this embodiment includes a hinge case 11 having an oil chamber 12 filled with hydraulic oil. The hinge case 11 is a member having an external shape of a substantially rectangular parallelepiped. The interior of the hinge case 11 is hollow as an oil chamber 12 filled with hydraulic oil, and an opening that opens the hollow is formed on the right side of the paper surface of FIG. This opening is closed by a plugging member 13, and an oil chamber 12 is formed by closing the cavity.

At one end of the hinge case 11 (on the left side of the paper in FIGS. 1A and 2), a rotating shaft 14 is rotatably arranged, which is connected to a door (not shown) and rotates as the door opens and closes. It is A substantially heart-shaped non-circular cam member 15 is fixedly installed at substantially the center of the rotating shaft 14 (see FIG. 2).

A cam follower 16 is arranged on the left side of the cam member 15 in FIG. Since the cam follower 16 is arranged so as to be able to slide on the outer peripheral surface of the cam member 15, when the door (not shown) opens and closes, the substantially heart-shaped cam member 15 rotates together with the rotating shaft 14, and the cam member 15 rotates. The outer ring of the cam follower 16 rotates along the outer peripheral surface of the cam member 15 while always maintaining a state of sliding contact with the outer peripheral surface of the cam member 15 . In other words, the cam follower 16 and the slide plate 17 to which the cam follower 16 is fixed are reciprocated in the hinge case 11 in the left-right direction of the plane of FIG. is configured to

A rod member 18 is connected to the slide plate 17 . The rod member 18 is arranged on the slide plate 17 on the opposite side of the side on which the cam follower 16 is installed. and the rod member 18. Also, the rod member 18 is inserted through the inside of a compression coil spring 31 which will be described later.

A piston member 19 is installed at the end of the rod member 18 opposite to the slide plate 17 connection side. The piston member 19 has the function of dividing the oil chamber 12 formed inside the hinge case 11 into an operating oil chamber 12a as a first oil chamber and a pressure oil chamber 12b as a second oil chamber. It is a member. As described above, when the door (not shown) opens and closes, the slide plate 17 reciprocates in the hinge case 11 in the lateral direction of the paper surface of FIG. The piston member 19 also reciprocates in the oil chamber 12 in the horizontal direction of the paper surface of FIG. When the door is fully closed as shown in FIG. 2, the piston member 19 is arranged at a position where the pressure oil chamber 12b, which is the second oil chamber, is the narrowest, and the first oil chamber, which is the operating pressure chamber 12b. The oil chamber 12a is arranged at the widest position. Further, as the door (not shown) opens from the fully closed state and the door opening angle increases, the piston member 19 moves in the direction to widen the pressure oil chamber 12b, which is the second oil chamber, and It moves in the direction to narrow the working oil chamber 12a, which is the first oil chamber.

Further, the piston member 19 according to this embodiment is provided with a valve member 20 having two functions of a check valve and a forced closing valve as a single member. The valve member 20 allows hydraulic fluid to flow from the hydraulic fluid chamber 12a, which is the first fluid chamber, into the pressure fluid chamber 12b, which is the second fluid chamber, while preventing hydraulic fluid from flowing in the opposite direction. It is a valve element that has the function of a non-return valve that stops. Therefore, when the door (not shown) opens from the fully closed state shown in FIG. 2 and the piston member 19 moves in the oil chamber 12 from the right side to the left side in FIG. The piston member 19 moves within the oil chamber 12 by allowing the hydraulic oil to flow from the hydraulic oil chamber 12a, which is the first oil chamber, into the pressure oil chamber 12b, which is the second oil chamber. It is configured so as not to hinder On the other hand, when the door (not shown) closes from the open state to the fully closed state shown in FIG. 2, the piston member 19 moves in the oil chamber 12 from left to right in FIG. At times, the valve member 20 does not allow hydraulic fluid to flow.

The function of the valve member 20 as a forced closing valve is a function that operates when an abnormal hydraulic pressure is generated in the hydraulic oil in the oil chamber 12, such as when a control mechanism section described later does not function. The floor hinge 10 according to this embodiment can also function as a safety device.

As shown in FIG. 2, the hinge case 11 includes a pressure oil chamber 12b as a second oil chamber and a hydraulic oil chamber 12a as a first oil chamber in addition to the mechanical members such as the valve member 20. 1st-speed flow path 11b and 2nd-speed flow path 11c, which are connected, and 1st-speed flow path 11b which connects pressure oil chamber 12b, which is the second oil chamber, and working oil chamber 12a, which is the first oil chamber, are separated from each other. A DA channel 11d and the like, which are unique channels, are formed. These mechanism members and flow passages form a control mechanism portion according to the present embodiment, which is a working oil chamber 12a, which is a first oil chamber accompanying the reciprocating movement of the piston member 19, and a second oil chamber. The moving speed of the piston member 19 can be controlled by adjusting the amount of hydraulic oil transferred between the pressure oil chambers 12b, thereby controlling the opening speed or closing speed of the door.

Here, a stopper-shaped portion 11a is formed on the inner wall surface of the hinge case 11 forming the oil chamber 12 (see the partial view (b) in FIG. 2). The stopper-shaped portion 11a is formed at a position slightly away from the connection position between the slide plate 17 and the rod member 18 toward the piston member 19 side. Between the stopper-shaped portion 11a and the piston member 19, a compression coil spring 31 that always exerts a biasing force on the piston member 19 in a constant direction surrounds the rod member 18. It is inserted and arranged. Elastic force is accumulated in the compression coil spring 31 by compressing the compression coil spring 31 due to the movement of the piston member 19 from the right side to the left side in FIG. This accumulated elastic force is configured to act on the door as a force in the door closing direction. Further, in the door closing operation by the accumulated elastic force, the door closing speed is preferably controlled by the above-described control mechanism section.

In this embodiment, the piston member 19 employs a configuration in which a piston body portion 19a that functions as a piston and a spring receiving member 19b that receives the biasing force from the compression coil spring 31 are combined. In this embodiment, the spring receiving member 19b against which the compression coil spring 31 presses is surrounded by the peripheral wall of the piston main body 19a and overlaps with each other in the axial direction. It is attached to the rod member 18 in a non-contact state. In the floor hinge according to the prior art, the members corresponding to the piston main body portion 19a and the spring receiving member 19b are generally mounted on the rod member while being spaced apart from each other in the axial direction. However, there is a problem that the dimension in the axial direction becomes large. However, in the floor hinge 10 according to the present embodiment, the piston body 19a and the spring bearing member 19b are superimposed to constitute the piston member 19, so that it is possible to avoid an increase in the size of the device. . In addition, the gap between the piston main body 19a and the spring receiving member 19b serves as a flow path for hydraulic oil passing through the check valve when the check valve is opened. 10, it has an effective device configuration.

The basic configuration of the floor hinge 10 according to this embodiment has been described above. Next, with reference to FIGS. 3 and 4, the characteristic configuration of the floor hinge 10 according to this embodiment will be described. FIG. 3 is a cross-sectional view taken along the line CC in FIG. 1, and is a vertical cross-sectional view showing characteristic portions of the rod member according to the present embodiment. 4A and 4B are diagrams showing the rod member according to the present embodiment, in which part view (a) in the figure is a partial cross-sectional side view of the rod member, and part view (b) is a bottom view of the rod member. is.

As shown in FIG. 4, the rod member 18 according to the present embodiment is provided with an expansion absorbing member accommodating portion 18a formed as a bottomed concave portion extending in the axial direction of the rod member 18. As shown in FIG. That is, the expansion absorbing member accommodating portion 18a is formed as a groove. A sponge rubber 18b, which is an expansion absorbing member, is housed inside the expansion absorbing member accommodating portion 18a.

The sponge rubber 18b is a rod-shaped member having a rectangular cross section, and as shown in FIG. 2B and FIG. Therefore, even if it is submerged in hydraulic oil and can float, it is configured to be able to stably hold its position inside the expansion absorbing member accommodating portion 18a.

The sponge rubber 18b has a closed-cell structure, and is configured so that when the working oil in the oil chamber 12 expands due to a rise in temperature, the air in each bubble is compressed and the volume shrinks. there is That is, expansion of the working oil due to temperature rise is absorbed by the volume change of the sponge rubber 18b, so that the internal pressure of the oil chamber 12 increases and oil leakage from the hinge case 11 is prevented. Further, the sponge rubber 18b, which has contracted in volume due to temperature rise, returns to its original volume when the operating oil returns to room temperature.

Furthermore, as for the initial shape of the sponge rubber 18b, as shown in FIG. 2B, the sponge rubber 18b having dimensions smaller than the shape and dimensions of the expansion absorbing member accommodating portion 18a may be accommodated and installed. The sponge rubber 18b is formed to have a width slightly larger than the groove width of the expansion absorbing member accommodating portion 18a, and when the sponge rubber 18b is pushed into the expansion absorbing member accommodating portion 18a, it is slightly compressed in the width direction. may be configured to be installed.

Furthermore, the initial shape of the sponge rubber 18b can be manufactured at a low cost by forming it as a rod-shaped member having a rectangular cross section, but any other shape can be adopted.

Furthermore, since the sponge rubber 18b according to the present embodiment is surrounded by the compression coil spring 31 while being housed inside the expansion absorbing member housing portion 18a, the manufacturing work to incorporate it inside the hinge case 11 is also required. It has the advantage of being easily possible.

As described above, in the present embodiment, the rod member 18 is formed with the expansion-absorbing member accommodating portion 18a, and the sponge rubber 18b, which is the expansion-absorbing member, is accommodated and installed in the expansion-absorbing member accommodating portion 18a. Therefore, it is possible to apply the sponge rubber 18b, which is the expansion absorbing member, to the floor hinge 10 without increasing the size of the device and increasing the manufacturing cost. That is, according to the present invention, a new expansion absorbing member can be installed on the floor hinge 10 without increasing the size of the device, increasing the number of parts, and increasing the manufacturing cost due to deterioration of assembly. A floor hinge 10 can be provided with a configuration.

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 added to the above embodiments.

For example, in the above-described embodiment, the expansion-absorbing member-accommodating portion 18a is formed as a bottomed concave portion extending in the axial direction of the rod member 18, but the expansion-absorbing member-accommodating portion of the present invention is For example, it can be formed as a bottomless through hole extending in the axial direction of the rod member 18 .

Further, for example, in the above-described embodiment, the expansion-absorbing member accommodating portion 18a is formed so as to open on the bottom side of the rod member 18 when the floor hinge 10 is installed. This configuration was adopted for the purpose of avoiding contact of the sponge rubber 18b with the compression coil spring 31 when the sponge rubber 18b floats in the operating oil in the installed state of the floor hinge 10. However, it has been confirmed by the inventors' test research that even if the sponge rubber 18b were to come into contact with the compression coil spring 31, the operation and life of the floor hinge 10 would not be affected. An arbitrary shape can be adopted for the opening position and opening direction of the expansion-absorbing member accommodating portion 18a.

It is clear from the description of the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

10 floor hinge, 11 hinge case, 11a stopper shape portion, 11b 1st speed channel (part of control mechanism portion), 11c 2nd speed channel (part of control mechanism portion), 11d DA channel (of control mechanism portion part), 12 oil chamber, 12a working oil chamber (first oil chamber), 12b pressure oil chamber (second oil chamber), 13 plug member, 14 rotating shaft, 15 cam member, 16 cam follower, 17 slide Plate 18 Rod member 18a Expansion absorbing member housing portion 18b Sponge rubber 19 Piston member 19a Piston body portion 19b Spring receiving member 20 Valve member (part of control mechanism portion) 31 Compression coil spring.

Claims (4)

a hinge case having an oil chamber filled with hydraulic oil;
a rotating shaft arranged on one end side of the hinge case and connected to the door to rotate with the opening and closing operation of the door;
a cam member fixedly installed on the rotating shaft;
a slide plate that reciprocates within the hinge case according to the rotational movement of the cam member by having a cam follower that is disposed so as to be slidably contactable with the cam member;
a rod member connected to the slide plate;
It is installed at the end of the rod member opposite to the slide plate connection side, divides the oil chamber into a first oil chamber and a second oil chamber, and is installed so as to be reciprocally movable within the oil chamber. a piston member that
a compression coil spring that always exerts a biasing force in a fixed direction on the piston member;
The movement speed of the piston member is controlled by adjusting the amount of hydraulic oil transferred between the first oil chamber and the second oil chamber accompanying the reciprocating movement of the piston member, thereby opening the door. a control mechanism unit that controls the door speed or the door closing speed;
A floor hinge comprising
A floor hinge, wherein the rod member is provided with an expansion-absorbing member accommodating portion, and the expansion-absorbing member is accommodated and installed in the expansion-absorbing member accommodating portion. A floor hinge according to claim 1, wherein
A floor hinge, wherein the expansion-absorbing member accommodating portion is formed as a bottomed concave portion extending in the axial direction of the rod member. A floor hinge according to claim 1, wherein
A floor hinge, wherein the expansion-absorbing member accommodating portion is formed as a bottomless, through-hole elongated hole extending in the axial direction of the rod member. A floor hinge according to claim 1 or 2,
A floor hinge, wherein the expansion-absorbing member accommodating portion is formed so as to open on the bottom side of the rod member when the floor hinge is installed.

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