JP7569559B2 - Door opening and closing device - Google Patents

Description

The present invention relates to a door opening and closing device that is equipped with a lever handle and receives door opening and closing operations.

As a door opening and closing device equipped with a lever handle and receiving an operation to open and close a door, Patent Document 1 describes a door opening and closing device equipped with a pair of lever handles and a locking member such as a latch bolt. The pair of lever handles are attached to both sides of the door and are connected to each other by a square core so that they rotate together. The latch bolt protrudes from the door edge and engages with the door frame or the like to lock the door in the closed state.

When the lever handle is rotated, the latch bolt retracts into the door, releasing the door from its locked state, and the door can be opened or closed by pushing or pulling the lever handle. In addition, a circular handle base is installed at the attachment position of the lever handle on the door so that the lever handle can be attached with sufficient strength to withstand the opening and closing operation of pushing and pulling the lever handle.

International Publication No. 2017/183056

However, in the door opening and closing device described in Patent Document 1, a handle seat is provided at the mounting position of the lever handle, which restricts the design of the door.

The present invention was made in consideration of the above problems, and its purpose is to provide a door opening and closing device that allows greater freedom in door design while ensuring sufficient mounting strength for the lever handle.

The door opening and closing device disclosed in the present application comprises a locking member (10), a handle mechanism (20), a conversion mechanism (30), a case (40), a base means (50, 50A), and a fixing member (60). The locking member (10) is provided so as to be able to protrude from and retract into the door end (2) of the door (1) and locks the door (1) in a closed state. The handle mechanism (20) includes a lever handle (21) and a handle shaft (22). The handle shaft (22) is connected to the lever handle (21) so as to be able to rotate integrally. The conversion mechanism (30) converts the rotational motion of the handle shaft (22) into linear motion of the locking member (10) so that the locking member (10) moves in a direction (X2) opposite to the protruding direction (X1) when protruding from the door end (2). The case (40) is housed in a storage space (3) formed inside the door (1), houses the conversion mechanism (30), and supports the locking member (10) so that it can advance and retreat. The base means (50, 50A) is attached to the case (40) and attaches the case (40) to the peripheral wall (3a) of the storage space (3). The base means (50, 50A) is disposed inside the storage space (3). The fixing member (60) has a main body portion (61), a connecting portion (62), and an engaging portion (63), and fixes the base means (50, 50A) to the peripheral wall (3a) of the storage space (3). The main body portion (61) is cylindrical, and the handle shaft (22) is inserted therethrough. The connecting portion (62) is formed on the main body portion (61) and connects the main body portion (61) to the base means (50, 50A). The engaging portion (63) is formed on the main body portion (61) and engages with the peripheral wall (3a).

In the door opening and closing device disclosed in the present application, the connecting portion (62) of the fixing member (60) includes one of a male thread and a female thread formed at one axial end of the main body portion (61) of the fixing member (60). The base means (50, 50A) has a connected portion (51) including the other of the male thread and the female thread that screws into one of the male thread and the female thread of the connecting portion (62). The engaging portion (63) of the fixing member (60) is flange-shaped and formed at the other axial end, and sandwiches the peripheral wall (3a) between the base means (50, 50A) when the main body portion (61) is inserted into an insertion hole (3b) formed in the peripheral wall (3a).

In addition, in the door opening and closing device disclosed in the present application, the base end (21a) of the lever handle (21) and the engagement portion (63) are substantially circular, and the outer diameter of the engagement portion (63) is substantially equal to or smaller than the outer diameter of the base end (21a).

The door opening and closing device of the present invention allows greater freedom in door design while ensuring sufficient mounting strength for the lever handle.

1 is a top view of a door opening and closing device according to an embodiment of the present invention; FIG. 2 is a front view of the door opening and closing device of FIG. 1 . FIG. 2 is a side view of the door opening and closing device of FIG. 1 . 1A is a plan view showing the seat means of the embodiment, and FIG. 1B is a cross-sectional view taken along line AA showing the seat means of the embodiment. 1A is a plan view showing another seat means according to the embodiment, and FIG. 1B is a cross-sectional view taken along line BB showing another seat means according to the embodiment. 1A is a plan view showing the fixing member of the embodiment, and FIG. 1B is a cross-sectional view taken along line CC showing the fixing member of the embodiment. 1A is a plan view showing the spacer member of the embodiment, and FIG. 1B is a cross-sectional view taken along line DD showing the spacer member of the embodiment.

Below, a door opening and closing device according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the embodiment described below is a preferred example for implementing the present invention, and therefore various technical limitations are imposed. However, the present invention is not limited to this embodiment unless otherwise specified in the following description to limit the invention.

<Embodiment>
A door opening and closing device according to an embodiment of the present invention will be described below with reference to Fig. 1 to Fig. 3. Fig. 1 is a top view of the door opening and closing device according to the embodiment of the present invention. Fig. 2 is a front view of the door opening and closing device of Fig. 1. Fig. 3 is a side view of the door opening and closing device of Fig. 1.

As shown in Figures 1 to 3, the door opening and closing device according to the embodiment is a device that receives an opening and closing operation of door 1, which is a hinged door, and opens and closes door 1, and is equipped with a latch bolt 10 as a locking member, a handle mechanism 20, a conversion mechanism 30, a case 40, base members 50, 50A as base means, a fixing member 60, and a spacer member 70. Inside door 1, near the door end 2, a storage space 3 for storing case 40 is formed. The storage space 3 opens to the door end 2.

The latch bolt 10 is provided so that it can be projected and retracted from the door edge 2 of the door 1, and engages with a strike installed in the door frame, for example, to lock the door 1 in the closed state. The tip of the latch bolt 10 is sloped, and when the latch bolt 10 is not locked, no handle operation is required to close the door 1; handle operation is only required to open the door 1.

The handle mechanism 20 includes a lever handle 21 and a handle shaft 22, and receives the operation of opening and closing the door 1. In the embodiment, the handle mechanism 20 includes a pair of lever handles 21 attached to both sides of the door 1.

As shown in Figures 1 and 3, the pair of lever handles 21 are attached to both sides of the door 1 so that the base end 21a is approximately parallel to the door surface and the grip portion extends approximately parallel to the door surface. In this embodiment, the base end 21a is approximately circular. An approximately circular shape is a shape that is recognized as a circle and is close to a perfect circle.

In this embodiment, the handle shaft 22 has a substantially square cross-sectional shape and is connected to the pair of lever handles 21 so as to be rotatable together with them. As shown in FIG. 1, an insertion hole 3b through which the handle shaft 22 is inserted is formed in each of the opposing peripheral walls 3a in the storage space 3. Note that it is not essential that the handle shaft 22 is a separate member from the lever handle 21, and the handle shaft 22 may be a member that is integrated with at least one of the pair of lever handles 21.

As shown in Figures 1 and 2, the conversion mechanism 30 converts the rotational motion of the handle shaft 22 into linear motion of the latch bolt 10 so that the latch bolt 10 moves in the opposite direction X2 to the protruding direction X1 when protruding from the door end 2.

The conversion mechanism 30 in the embodiment is a known conversion mechanism that uses a lever cam, and detailed description is omitted. In the embodiment, the handle shaft 22 is supported by the conversion mechanism 30 by being inserted into a shaft hole 31 formed in the lever cam, and the rotation of the handle shaft 22 is transmitted to the conversion mechanism 30.

As shown in Figures 1 and 2, the case 40 is rectangular and is housed in the storage space 3, houses the conversion mechanism 30, and supports the latch bolt 10 so that it can advance and retreat. In this embodiment, the case 40 is made of metal, and in addition to the conversion mechanism 30 and the latch bolt 10, it also houses a locking mechanism 44 such as a cylinder lock that locks the latch bolt 10, a spring that biases the latch bolt 10 in the protruding direction X1, and a spring that biases the lever handle 21 so that it rotates to its initial position when not being operated.

The case 40 also has a plate-shaped extension 41 that extends up and down from the main body of the case 40 on the surface facing the door end 2. As shown in Figures 2 and 3, the extension 41 is fastened to the door end 2 of the door 1 by a mounting screw 43 together with a cover plate 42.

Next, the pedestal members 50, 50A as pedestal means will be described with reference to Figures 4 and 5. Figure 4(a) is a plan view showing the pedestal member of the embodiment. Figure 4(b) is a cross-sectional view taken along line A-A showing the pedestal member of the embodiment. Figure 5(a) is a plan view showing another pedestal member of the embodiment. Figure 5(b) is a cross-sectional view taken along line B-B showing another pedestal member of the embodiment.

As shown in Figs. 4 and 5, the base members 50, 50A are plate-shaped, and as shown in Figs. 1 and 2, they are attached to the case 40, and the case 40 is attached to the peripheral wall 3a of the storage space 3. The base members 50, 50A are disposed inside the storage space 3. In the embodiment, the base members 50, 50A are made of metal, but may be made of resin.

In addition, in the embodiment, two pedestal members 50, 50A are attached to both the inner and outer surfaces of the case 40. The inner surface of the case 40 refers to the surface facing the inside of a room or the like in which the door 1 is installed, and the outer surface refers to the surface facing the outside. In the embodiment, one of the two pedestal members 50, 50A, pedestal member 50, is attached to the outer surface of the case 40, and the other pedestal member 50A is attached to the inner surface of the case 40.

In the embodiment, the base members 50, 50A are disk-shaped and have a connected portion 51 in the center that includes a female screw that penetrates the base members 50, 50A in the thickness direction. In the embodiment, the thickness of the base members 50, 50A and the thickness of the case 40 are set so that the sum of the thickness of the case 40 and the thickness of the base members 50, 50A approximately matches the dimension of the door 1 in the thickness direction in the storage space 3. "Approximately matches" means that the two base members 50, 50A and the peripheral walls 3a on both sides of the storage space 3 match to the extent that they rub against each other when the case 40 is inserted into the storage space 3.

As shown in FIG. 4, a pair of screw insertion holes 52 are formed in one of the base members 50 so as to be aligned in a straight line with the connected portion 51 therebetween. Set screws 54 shown in FIG. 1 are inserted into the pair of screw insertion holes 52. As shown in FIG. 4, a recess 53 that fits with the head of the set screw 54 is formed around the screw insertion hole 52 coaxially with the pair of screw insertion holes 52.

As shown in FIG. 5, a pair of screw holes 52A are formed in the other base member 50A so as to be aligned in a straight line with the connected portion 51 therebetween. The pair of screw holes 52A are formed in positions corresponding to the pair of screw insertion holes 52 of one base member 50, and as shown in FIG. 1, the set screws 54 inserted into the pair of screw insertion holes 52 are screwed into the pair of screw holes 52A, whereby the two base members 50, 50A are attached to both sides of the case 40.

Next, the fixing member 60 will be described with reference to FIG. 6. FIG. 6(a) is a plan view showing the fixing member of the embodiment. FIG. 6(b) is a cross-sectional view taken along line C-C showing the fixing member of the embodiment.

As shown in FIG. 6, the fixing member 60 has a main body portion 61, a connecting portion 62, an engagement portion 63, and a rotation operation groove 64, and fixes the base members 50, 50A to the peripheral wall 3a of the storage space 3. In the embodiment, the fixing member 60 is made of metal, and two fixing members 60 are used to fix the two base members 50, 50A to each of the opposing peripheral walls 3a of the storage space 3.

The main body 61 is cylindrical and is inserted into the insertion hole 3b, with the handle shaft 22 being inserted into the hollow portion. In this embodiment, the main body 61 is cylindrical, and the axial length of the main body 61 is set to be greater than the thickness of the peripheral wall 3a of the storage space 3. In this embodiment, the shape of the insertion hole 3b is approximately circular, and the diameter of the insertion hole 3b is set to be approximately equal to the outer diameter of the main body 61, to the extent that the main body 61 fits into the insertion hole 3b without any gaps.

The connecting portion 62 is formed on the main body portion 61 and connects the main body portion 61 to the base members 50, 50A. In the embodiment, the connecting portion 62 includes a male thread formed on one axial end of the main body portion 61 of the fixing member 60, which screws into a female thread included in the connected portion 51 of the base members 50, 50A, connecting the main body portion 61 to the base members 50, 50A.

The engaging portion 63 is formed on the main body 61 and engages with the peripheral wall 3a. In this embodiment, the engaging portion 63 is flange-shaped and is formed on the other axial end of the main body 61, and as shown in FIG. 1, when the main body 61 is inserted into the insertion hole 3b, the peripheral wall 3a is sandwiched between the base member 50 and the base member 50A.

As shown in FIG. 6, the rotation operation groove 64 is formed in the engagement portion 63 so that it can be fitted with a coin such as a 10 yen coin. By fitting a coin into the rotation operation groove 64 and rotating it, the main body portion 61 can be rotated, and the male thread of the connecting portion 62 can be easily screwed into and out of the female thread of the connected portion 51 of the base members 50 and 50A.

In addition, in this embodiment, the base end 21a of the lever handle 21 and the engagement portion 63 are substantially circular, and the outer diameter of the engagement portion 63 is substantially equal to or smaller than the outer diameter of the base end 21a.

Next, the spacer member 70 of the embodiment will be described with reference to FIG. 7. FIG. 7(a) is a plan view showing the spacer member of the embodiment. FIG. 7(b) is a cross-sectional view taken along line D-D showing the spacer member of the embodiment.

As shown in FIG. 7, the spacer member 70 includes a main body portion 71, a brim-shaped cover portion 72, and a fitting portion 73. In the embodiment, the spacer member 70 is made of resin, but when the fixing member 60 is made of resin, the spacer member 70 can be omitted.

The main body 71 of the spacer member 70 is cylindrical and is inserted into the hollow portion of the main body 61 of the fixing member 60, and is disposed between the handle shaft 22 and the main body 61 of the fixing member 60. The cover portion 72 is formed at one axial end of the main body 71, covers the engagement portion 63 of the fixing member 60, and is disposed between the base end 21a of the lever handle 21 and the engagement portion 63 of the fixing member 60. The engagement portion 73 is groove-shaped and formed in the cover portion 72, and engages with the engagement portion 63 of the fixing member 60.

As described above with reference to Figs. 1 to 7, according to the door opening and closing device of the embodiment, the case 40 is stored in the storage space 3 formed inside the door 1, the base members 50, 50A are disposed inside the storage space 3, and the fixing member 60 fixes the base members 50, 50A to the peripheral wall 3a of the storage space 3. By disposing the base members 50, 50A inside the storage space 3, the base members 50, 50A can be hidden so that they cannot be seen from the outside of the door 1, and the design of the door 1 is prevented from being restricted by the presence of the base members 50, 50A, allowing for greater freedom in the design of the door 1.

In addition, the conversion mechanism 30 that supports the handle shaft 22 is housed in the case 40, and the case 40 is attached to the peripheral wall 3a of the storage space 3 by the base members 50, 50A, so the lever handle 21 can be attached to the door 1 with the same strength as when the handle base is disposed on the outer surface of the door in a conventional door opening and closing device.

Furthermore, as explained with reference to FIG. 1, the thickness of each component is set so that the sum of the thickness of the case 40 and the thickness of the base members 50 and 50A is approximately equal to the dimension of the door 1 in the thickness direction in the storage space 3, thereby reducing rattling within the storage space 3 of the case 40 that supports the handle shaft 22, and improving the operability when opening and closing the door 1 by operating the lever handle 21.

In conventional door opening and closing devices, the case is supported on the handle base via a screw cylinder as shown in Patent Document 1, and a gap is created between the peripheral wall of the storage space and the case. In this embodiment, for example, by adjusting the thickness of the base members 50, 50A according to the thickness of the door 1, the rattle of the case 40 inside the storage space 3 can be reduced, and the operability when opening and closing the door 1 by operating the lever handle 21 can be improved.

As described with reference to Figures 1 to 7, in the door opening and closing device of the embodiment, the connecting portion 62 of the fixing member 60 includes a male thread, the connected portion 51 of the base members 50 and 50A includes a female thread, and the brim-shaped engaging portion 63 of the fixing member 60 sandwiches the peripheral wall 3a between the base members 50 and 50A when the main body portion 61 of the fixing member 60 is inserted into the insertion hole 3b formed in the peripheral wall 3a of the storage space 3.

Therefore, the base members 50, 50A can be fixed to the peripheral wall 3a of the storage space 3 by a simple operation of simply screwing the male thread of the fixing member 60 through the insertion hole 3b into the female thread of the base members 50, 50A, and the door opening and closing device can be easily installed on the door 1. Also, as described above, by forming the rotation operation groove 64 in the fixing member 60, the case 40 can be attached and detached from the door 1 without using special tools, for example, with just a coin and a screwdriver, making the installation of the door opening and closing device even easier.

As described with reference to Figures 1 and 7, in the door opening and closing device of the embodiment, the spacer member 70 is disposed between the fixed member 60 and the base end 21a of the lever handle 21 and the handle shaft 22. Therefore, when the lever handle 21, the handle shaft 22, and the fixed member 60 are made of metal, it is possible to prevent the metals from coming into contact with each other, prevent abnormal noises from being generated when the handle is operated, and prevent damage to each component, thereby improving the operability and durability of the door opening and closing device.

As described with reference to FIG. 1 etc., in the door opening and closing device of the embodiment, the base end 21a of the lever handle 21 and the brim-shaped engagement portion 63 are substantially circular, and the outer diameter of the engagement portion 63 is substantially equal to or smaller than the outer diameter of the base end 21a. Therefore, the base end 21a of the lever handle 21 can hide the engagement portion 63 of the fixing member 60 or the cover portion 72 of the spacer member 70, and it can be made to look as if the lever handle 21 is directly attached to the door 1, for example, and the design freedom of the door 1 can be further increased.

When the outer diameter of the engaging portion 63 of the fixing member 60 or the covering portion 72 of the spacer member 70 is slightly larger than the outer diameter of the base end 21a, the engaging portion 63 of the fixing member 60 or the covering portion 72 of the spacer member 70 is recognized by the human eye as being integral with the lever handle 21. Therefore, even when the diameter of the engaging portion 63 of the fixing member 60 or the covering portion 72 of the spacer member 70 is slightly larger than the outer diameter of the base end 21a, for example, the lever handle 21 can be made to look as if it is directly attached to the door 1, allowing greater freedom in the design of the door 1.

The above describes an embodiment of the present invention with reference to the drawings (Figs. 1 to 7). However, the present invention is not limited to the above embodiment, and can be implemented in various aspects without departing from the gist of the present invention (for example, (1) to (4) below).

(1) In the above embodiment, the shape of the base end 21a of the lever handle 21 was approximately circular, but this is not limited thereto, and the shape of the base end can be any suitable shape, such as a polygon, cloud, ellipse, star, etc. In this case, by making the shape of the engagement portion 63 of the fixing member 60 the same as the shape of the base end 21a, it is possible to prevent the presence of the fixing member 60 from restricting the design of the door 1, and further reliably increase the degree of freedom in the design of the door 1.

(2) In the above embodiment, the connecting portion 62 of the fixing member 60 is screwed into the connected portion 51 of the base member 50, 50A, thereby connecting the main body portion 61 of the fixing member 60 to the base member 50, 50A, but this is not limited to this. For example, the main body portion 61 of the fixing member 60 can be connected to the base member 50, 50A by forming a screw insertion hole in the connecting portion 62 of the fixing member 60 and screwing the main body portion 61 to the base member 50, 50A from the inner periphery side, and the fixing member 60 can be connected to the base member 50, 50A in various ways.

(3) In the above embodiment, the base means is a plate-shaped base member 50, 50A separate from the case 40, but the base member 50, 50A may be formed integrally with the case 40. Alternatively, the base means may have a structure capable of receiving a load over a certain area, and the thickness of the case 40 and the dimensions of the door 1 in the thickness direction in the storage space 3 may be set so that the surface of the case 40 facing the peripheral wall 3a directly contacts the peripheral wall 3a and receives the load, and the surface of the case 40 facing the peripheral wall 3a may be used as the base means. In this case, the connected portion 51 is formed on the surface of the case 40 facing the peripheral wall 3a. However, it is preferable that the base means is a base member 50, 50A separate from the case 40, because the base members 50, 50A of various thicknesses can be attached to the case 40 to better accommodate doors of various thicknesses. In addition, as long as the base members 50, 50A are disposed inside the storage space 3, they do not necessarily need to be in contact with the case 40, and may be attached to the case 40 using a conventional screw tube or the like so that there is a gap between the surface of the case 40.

(4) In the above embodiment, the connecting portion 62 of the fixing member 60 includes a male thread, and the connected portion 51 of the base member 50, 50A includes a female thread, but this is not limited thereto, and the connecting portion 62 of the fixing member 60 may include a female thread, and the connected portion 51 of the base member 50, 50A may include a male thread. When the connecting portion 62 of the fixing member 60 includes a female thread, and the connected portion 51 of the base member 50, 50A includes a male thread, it is possible to form an annular protrusion on the surface of the base member 50, 50A facing the peripheral wall 3a, and form a male thread on the annular protrusion. Alternatively, an annular groove may be formed on the surface of the base member 50, 50A facing the peripheral wall 3a, and a male thread may be formed on the wall portion on the inner circumferential side of the annular groove.

X1: Protruding direction X2: Opposite direction 1: Door 2: Door end 3: Storage space 3a: Peripheral wall 10: Latch bolt (locking member)
20...Handle mechanism 21...Lever handle 21a...Base end portion 22...Handle shaft 30...Conversion mechanism 40...Case 50, 50A...Pedestal member 51...Connected portion 60...Fixed member 61...Main body portion 62...Connecting portion 63...Engaging portion

Claims (3)

a locking member (10) that is provided so as to be able to protrude from and retract into the door end (2) of the door (1) and locks the door (1) in a closed state;
a handle mechanism (20) including a lever handle (21) and a handle shaft (22) connected to the lever handle (21) so as to be integrally rotatable, and configured to receive an opening/closing operation of the door (1);
a conversion mechanism (30) that converts the rotational motion of the handle shaft (22) into linear motion of the locking member (10) so that the locking member (10) moves in a direction (X2) opposite to a protruding direction (X1) when protruding from the door end (2);
a case (40) that is accommodated in a storage space (3) formed inside the door (1), accommodates the conversion mechanism (30), and supports the locking member (10) so that the locking member can move forward and backward;
a base means (50, 50A) attached to the case (40) and used to attach the case (40) to a peripheral wall (3a) of the storage space (3), the base means (50, 50A) being disposed inside the storage space (3);
a fixing member (60) having a cylindrical main body portion (61) through which the handle shaft (22) is inserted, a connecting portion (62) formed on the main body portion (61) for connecting the main body portion (61) to the base means (50, 50A), and an engaging portion (63) formed on the main body portion (61) for engaging with the peripheral wall (3a), and fixing the base means (50, 50A) to the peripheral wall (3a) of the storage space (3);
A door opening and closing device comprising: The connecting portion (62) of the fixing member (60) includes one of a male thread and a female thread formed at one axial end of the main body portion (61) of the fixing member (60),
the base means (50, 50A) has a connected portion (51) including the other of the male thread and the female thread that is screwed into the one of the male thread and the female thread of the connecting portion (62);
2. The door opening and closing device according to claim 1, wherein the engaging portion (63) of the fixing member (60) is brim-shaped and formed at the other end in the axial direction, and sandwiches the peripheral wall (3a) between the main body portion (61) and the base means (50, 50A) when the main body portion (61) is inserted into an insertion hole (3b) formed in the peripheral wall (3a). The door opening and closing device according to claim 2, wherein the base end (21a) of the lever handle (21) and the engagement portion (63) are substantially circular, and the outer diameter of the engagement portion (63) is substantially equal to or smaller than the outer diameter of the base end (21a).

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