Door locking device

Abstract

To provide a lock device of a door body which can be made compact so that a stile can be arranged on a smaller door body.SOLUTION: A lock device of a door body includes a locking member 10, an operation member 20, a rod 30, a guiding member 40, and a guided member 50. The locking member moves up and down between a locked state and an unlocked state, the locked state being a state in which the locking member locks the door body in a closed state, and the unlocked state being a state in which the locking member does not lock the door body. The operation member interlocks with the locking member and receives operation to move the locking member up and down. The rod connects the locking member and the operation member. The guiding member guides movement of the operation member. The guided member extends in a vertical direction and includes a first connection section, a second connection section, and a slide contact section. The first connection section is connected to the operation member. The second connection section is connected to the rod. The slide contact section is arranged in a position in the vertical direction different from a position of the first connection section, and comes into slide contact with the guiding member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a door locking device that locks various types of doors, such as sliding doors, swing doors, and folding doors, to the upper and lower door frames, or to the ceiling, floor, etc., and locks the door so that it does not move, and in particular to a door locking device that can be built into the vertical frame of a door that has a stile. [Background technology]

[0002] Patent Document 1 describes a door locking device that can be built into the vertical frame of a door, as a door locking device that locks various types of door to the upper and lower door frames, ceiling, floor, etc. The door locking device described in Patent Document 1 includes a locking member, a rod, an operating member, a guided member, and a case.

[0003] The locking member engages with a locking recess provided in the upper frame of the door frame to lock the door body. The operating member accepts operation to move the locking member up and down between a locked state and an unlocked state. The rod is connected to the locking member at its upper end and to a guided member at its lower end. The guided member is shaped like a square bar and connects the rod and the operating member.

[0004] The case is cylindrical, and a square rod-shaped guided member is slidably inserted through the case to guide the vertical movement of the operating member. The guided member has an insertion hole through which a shaft-shaped fixing means such as a screw is inserted, and the operating member is fixed to the guided member by the fixing means inserted through the insertion hole of the guided member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-89546 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the door locking device described in Patent Document 1, because the operating member to which the operating force is applied is fixed to the guided member by a shaft-shaped fixing means, the guided member needs to have a minimum thickness to allow the fixing means, which has a relatively large diameter, to pass through. Therefore, the case arranged to contain the guided member also needs to have a minimum width and thickness, which places restrictions on how compact the case can be, and when the locking device is built into the vertical frame of the door, if the vertical frame's width or other dimensions are small, it cannot be built in, limiting the door bodies that can be installed.

[0007] The present invention has been made in view of the above-mentioned problems, and its object is to provide a door locking device that can be made compact so that it can be installed on a door with a smaller vertical frame. [Means for solving the problem]

[0008] The door locking device disclosed in the present application comprises a locking member, an operating member, a rod, a guide member, and a guided member. The locking member moves up and down between a locked state and an unlocked state. The locked state is a state in which the locking member locks the door body. The unlocked state is a state in which the locking member does not lock the door body. The operating member is interlocked with the locking member and accepts an operation to move the locking member up and down. The rod connects the locking member and the operating member. The guide member guides the operating member. The guided member extends in the vertical direction and has a first connecting portion, a second connecting portion, and a sliding portion. The first connecting portion is connected to the operating member. The second connecting portion is connected to the rod. The sliding portion is disposed at a different position in the vertical direction from the first connecting portion and is in sliding contact with the guide member.

[0009] The door locking device disclosed herein further includes a temporary fixing portion. The temporary fixing portion temporarily fixes the locking member in the locked state and the unlocked state. In the door locking device disclosed herein, one of the guide member and the sliding contact portion contains the other. The temporary fixing portion includes a first groove portion, a second groove portion, and an elastic engagement portion. The first groove portion and the second groove portion are formed in positions on the one of the guide member and the sliding contact portion that correspond to the locked state and the unlocked state. The elastic engagement portion is disposed on the other of the guide member and the sliding contact portion and elastically engages with the first groove portion and the second groove portion.

[0010] The door locking device disclosed herein further includes an emergency unlocking unit that receives an emergency unlocking operation. The emergency unlocking operation is an operation of moving the operating member from one of both sides of the door opposite to the side where the operating member is provided so as to set the locking member to the unlocked state. [Effects of the Invention]

[0011] According to the door locking device of the present invention, the vertical frame can be made compact so that it can be installed on a door having a smaller size. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a side view showing a locking device for a door body according to an embodiment of the present invention; [Figure 2] FIG. 2 is a front view showing the door body of the embodiment. [Figure 3] FIG. 2 is a top view showing the vertical stile of the door body of the embodiment. [Figure 4] 1 is a side view showing a state in which a door locking device according to an embodiment of the present invention is installed on a door. [Figure 5] 1 is a front view showing a state in which a door locking device according to an embodiment of the present invention is installed on a door. [Figure 6]1A is a front view of the guide member of the embodiment, FIG. 1B is a side view of the guide member of the embodiment, and FIG. 1C is a top view of the guide member of the embodiment. [Figure 7] 1A is a front view showing a guided member of the embodiment, FIG. 1B is a side view showing a guided member of the embodiment, and FIG. 1C is a top view showing a guided member of the embodiment. [Figure 8] 1 is a rear view showing a state in which a door locking device according to an embodiment of the present invention is installed on a door. [Figure 9] 1A is a front view of the locking member of the embodiment, FIG. 1B is a side view of the locking member of the embodiment, and FIG. 1C is a top view of the locking member of the embodiment. [Figure 10] 1A and 1B are a front view and a side view, respectively, of a rod according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0013] The following describes in detail a door locking device according to an embodiment of the present invention with reference to the drawings. The embodiment described below is a preferred example for carrying out 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.

[0014] <Embodiment> A locking device for a door body according to an embodiment of the present invention will be described below with reference to Figs. 1 to 5. Fig. 1 is a side view showing the locking device for a door body according to an embodiment of the present invention. Fig. 2 is a front view showing the door body according to the embodiment. Fig. 3 is a top view showing the vertical stile of the door body according to the embodiment. Fig. 4 is a side view showing the locking device for a door body according to the embodiment in a state where it is installed on the door body. Fig. 5 is a front view showing the locking device for a door body according to the embodiment in a state where it is installed on the door body.

[0015] As shown in Figures 1 and 2, the locking device for a door body according to the embodiment is attached to a door body 1 having a stile, and includes a locking member 10, an operating member 20, a rod 30, a guide member 40, a guided member 50, a temporary fixing portion 60, an emergency unlocking portion 70, an adjustment means 80, and a holding means 90.

[0016] As shown in Fig. 2, the door body 1 of the embodiment is a sliding glass door, has a vertical frame 1a made of aluminum alloy, and is supported by a door frame 2, floor, ceiling, etc. so that it can move left and right in Fig. 2. The door body 1 can be suitably used as a door between a dressing room and a bathroom, a room partition door, etc. The locking device of the door body of the embodiment engages the door body 1 with the upper and lower door frames, the floor, ceiling, etc., and locks the door body 1 in, for example, a closed state so that it does not move.

[0017] The closed state is a state in which the vertical stile 1a of the door body 1 is in contact with the vertical frame 2a of the door frame 2. Note that the door body locking device of the embodiment does not need to lock the door body 1 in the closed state, and if the door body 1 is a partition door, it can also be locked in a fixed position so that the door body 1 does not move when the vertical stile 1a of the door body 1 is not in contact with the vertical frame 2a of the door frame 2.

[0018] As shown in Figures 3 to 5, the vertical frame 1a has a storage space 1b therein that extends vertically and has a uniform cross-sectional shape. In this embodiment, the cross-sectional shape of the storage space 1b is a flattened rectangle, and the width direction of the storage space 1b coincides with the thickness direction of the door body 1. Here, the "flattened rectangle" refers to a rectangle that has a "length" and a "width" and is not a square, but the cross-sectional shape of the storage space 1b is not particularly limited and may be a square, ellipse, or track ellipse. In addition, the door body locking device of the embodiment is inserted into the storage space 1b through an opening 1c of the storage space 1b at the upper or lower end of the vertical frame 1a, and is housed in the storage space 1b and built into the vertical frame 1a.

[0019] The vertical frame 1a has grooves 1d on both the indoor side (e.g., the bathroom side) and the outdoor side (e.g., the changing room side) of the door body 1, and as shown in Fig. 4, a first elongated guide hole 1e is provided at the bottom of the indoor-side groove 1d, and a second elongated guide hole 1f is provided at the bottom of the outdoor-side groove 1d. As shown in Fig. 3, the vertical frame 1a and the upper frame 1g are connected by a set screw 1h, and a first buffer member 1i extending vertically is provided on the door edge side of the vertical frame 1a, and a second buffer member 1k extending vertically to hold the glass plate 1j is provided on the opposite side.

[0020] The locking member 10 is provided so as to be movable up and down between a locked state indicated by a solid line in Fig. 1 and an unlocked state indicated by a two-dot chain line. In this embodiment, the position of the locking member 10 in the locked state is higher than the position of the locking member 10 in the unlocked state. Note that the locking member 10 may also lock the door body 1 to the floor or the bottom frame of the door frame 2, and when the locking member 10 locks the door body 1 to the floor or the bottom frame of the door frame 2, the position of the locking member 10 in the locked state is lower than the position of the locking member 10 in the unlocked state.

[0021] The locked state is a state in which the locking member 10 locks the door body 1. In this embodiment, the locking member 10 engages with a locking recess 2c formed in the upper frame 2b of the door frame 2 in the locked state, locking the door body 1. The unlocked state is a state in which the locking member 10 does not lock the door body 1, and in this embodiment, the locking member 10 is retracted inside the vertical frame 1a in the unlocked state, and is released from engagement with the locking recess 2c.

[0022] The operating member 20 is linked to the locking member 10 and receives an operation to move the locking member 10 up and down. In this embodiment, the operating member 20 is made of an aluminum alloy, and has a grip portion 21 and a connecting protrusion 22, as shown in FIGS.

[0023] The grip portion 21 of the operating member 20 is a vertically long rectangular plate that is disposed inside the groove 1d of the vertical frame 1a and makes sliding contact with the groove 1d. A rectangular buffer spacer 23 made of a resin sheet is disposed between the grip portion 21 and the bottom of the groove 1d to prevent the grip portion 21 from rubbing against the bottom of the groove 1d and damaging the bottom of the groove 1d. Furthermore, because the grip portion 21 is a vertically long rectangular plate, the grip portion 21 can cover the first guide slot 1e, improving the design of the door body 1.

[0024] The connecting protrusion 22 of the operating member 20 protrudes from the back surface of the grip portion 21, is inserted into the first elongated guide hole 1e, and makes sliding contact with the first elongated guide hole 1e. The connecting protrusion 22 has an elliptical track-shaped cross section, and a female screw 22a opens at the tip of the protrusion. The connecting protrusion 22 has an elliptical track-shaped cross section and makes sliding contact with the first elongated guide hole 1e, thereby preventing rotation of the operating member 20 and maintaining the correct orientation of the grip portion 21 in the up-down direction.

[0025] The rod 30 connects the locking member 10 and the operating member 20. In this embodiment, the upper end of the rod 30 is connected to the locking member 10, and the lower end of the rod 30 is connected to the guided member 50, and the rod 30 connects the locking member 10 and the operating member 20 via the guided member 50.

[0026] The guide member 40 and the guided member 50 will be described below with reference to FIGS. 6 and 7. FIG. 6(a) is a front view of the guide member of the embodiment. FIG. 6(b) is a side view of the guide member of the embodiment. FIG. 6(c) is a top view of the guide member of the embodiment. FIG. 7(a) is a front view of the guided member of the embodiment. FIG. 7(b) is a side view of the guided member of the embodiment. FIG. 7(c) is a top view of the guided member of the embodiment.

[0027] As shown in Figure 6, the guide member 40 is a profile-shaped member having a flat C-shaped cross-sectional shape similar to that of a lip channel steel, and its cross-sectional shape is a flat rectangle overall.It is accommodated in the accommodation space 1b so that its width direction coincides with the thickness direction of the door body 1, is fixed to the vertical frame 1a, and guides the operating member 20.

[0028] The guide member 40 and the guided member 50 described below are arranged so that one contains the other, and in the embodiment, the guide member 40 contains the sliding contact portion 53 of the guided member 50, guides the guided member 50, and guides the vertical movement of the operating member 20.

[0029] The guide member 40 also has a long stop hole 41 that is long in the vertical direction, and a plurality of set screw holes 42. A shaft-shaped stop member (not shown) is inserted into the long stop hole 41. The shaft-shaped stop member is disposed on the guided member 50 so as to prevent the guided member 50 from falling off the guide member 40.

[0030] 5, a plurality of setscrews 40a are threaded into the plurality of setscrew holes 42 so as to penetrate the peripheral wall of the storage space 1b, and the guide member 40 is fixed to the vertical stile 1a inside the storage space 1b. The plurality of setscrews 40a are screwed into each of the outer surfaces of the vertical stile 1a from the outer surface on the door edge side where the first buffer member 1i is disposed, and the heads of the plurality of setscrews 40a are covered by the first buffer member 1i and are not exposed to the outside, improving the design of the door body 1.

[0031] 7, the guided member 50 has a long plate shape overall, extends in the vertical direction, and is disposed inside the storage space 1b so that its width direction coincides with the thickness direction of the door body 1. The guided member 50 includes a first connecting portion 51, a second connecting portion 52, and a sliding contact portion 53.

[0032] In the embodiment, the second connecting portion 52, the first connecting portion 51, and the sliding contact portion 53 are arranged in this order from the top of the guided member 50, and the sliding contact portion 53 is arranged at a different position in the vertical direction of the guided member 50 from the first connecting portion 51 and the second connecting portion 52.

[0033] The first connecting portion 51 of the guided member 50 has a flattened rectangular cross section, has a first through-hole 51a, and is connected to the operating member 20. The first through-hole 51a is formed to penetrate the first connecting portion 51 in a direction intersecting the extension direction of the guided member 50, in this embodiment, in the width direction of the guided member 50, which is the thickness direction of the door body 1. A fastening member 71, which will be described later, is inserted into the first through-hole 51a.

[0034] The second connecting portion 52 of the guided member 50 is a long plate having the same thickness and width as the first connecting portion 51 but being shorter than the first connecting portion 51, and is connected to the rod 30. The second connecting portion 52 also has a second female screw 52a. In this embodiment, the second female screw 52a opens at the upper end surface of the second connecting portion 52.

[0035] Additionally, second connecting portion 52 is integrally connected to first connecting portion 51 by narrow width portion 54. Narrow width portion 54 is thinner and narrower than first connecting portion 51 and second connecting portion 52, and is fitted with a U-shaped resin sliding spacer 55. Sliding spacer 55 comes into sliding contact with the peripheral wall of accommodation space 1b so that guided member 50 can move smoothly up and down inside accommodation space 1b.

[0036] The sliding contact portion 53 of the guided member 50 is a long plate that is thinner and narrower than the first connecting portion 51, extends downward from the lower end of the first connecting portion 51, and comes into sliding contact with the guide member 40. The sliding contact portion 53 also has a second through hole 53a and a third through hole 53b. The second through hole 53a passes through the sliding contact portion 53 in the width direction of the guided member 50 and accommodates a spring 64, which will be described later, and also accommodates a pair of steel balls 65 protruding through openings at both ends. The third through hole 53b passes through the sliding contact portion 53 in the thickness direction of the guided member 50 and allows the aforementioned shaft-shaped member for preventing slippage to be inserted therethrough.

[0037] The temporary fixing portion 60 will be described below with reference to FIGS. 6, 7, and the above-mentioned FIG.

[0038] The temporary fixing portion 60 temporarily fixes the locking member 10 in the locked state and the unlocked state. In this embodiment, the temporary fixing portion 60 includes a first groove portion 61, a second groove portion 62, and an elastic engagement portion 63.

[0039] 6, the first groove 61 and the second groove 62 are formed at positions corresponding to the locked and unlocked states of either the guide member 40 or the guided member 50. In the embodiment, the first groove 61 is formed in the guide member 40 at a position facing both end openings of the second through hole 53a of the guided member 50 when the locking member 10 is in the locked state. The second groove 62 is formed in the guide member 40 at a position facing both end openings of the second through hole 53a of the guided member 50 when the locking member 10 is in the unlocked state.

[0040] The elastic engagement portion 63 is disposed on the other of the guide member 40 and the guided member 50, and elastically engages with the first groove portion 61 and the second groove portion 62. In this embodiment, the elastic engagement portion 63 includes a spring 64 and a pair of steel balls 65, which are a pair of engagement members, and is disposed on the sliding contact portion 53 of the guided member 50.

[0041] The spring 64 is compressed and accommodated inside the second through hole 53a in the sliding contact portion 53. A pair of steel balls 65 are accommodated inside the second through hole 53a so as to abut against both ends of the spring 64, and are urged by the spring 64 so as to protrude outward from both end openings of the second through hole 53a, and elastically engage with the first groove portion 61 and the second groove portion 62. When the pair of steel balls 65 engage with the first groove portion 61, the locking member 10 is temporarily fixed in the locked state, and when the pair of steel balls 65 engage with the second groove portion 62, the locking member 10 is temporarily fixed in the unlocked state.

[0042] Next, the emergency unlocking unit 70 will be described with reference to Fig. 8 and the above-mentioned Fig. 4 and Fig. 7. Fig. 8 is a rear view showing the locking device for the door body according to the embodiment, in a state where it is installed on the door body.

[0043] The emergency unlocking unit 70 accepts an emergency unlocking operation. The emergency unlocking operation is an operation of moving the operating member 20 from one of both sides of the door body 1 opposite to the side on which the operating member 20 is disposed so as to set the locking member 10 to the unlocked state.

[0044] 4 and 8, the emergency unlocking unit 70 includes a fastening member 71. In this embodiment, the fastening member 71 is a hexagon socket head bolt having a shaft portion 71a and a head portion 71b, and fastens the first connecting portion 51 of the guided member 50 and the operating member 20 together.

[0045] The shaft portion 71a of the fastening member 71 has a male thread and is inserted into the first through-hole 51a of the first connecting portion 51 from the side opposite to the operating member 20. The male thread of the shaft portion 71a is screwed into the female thread 22a of the connecting protrusion 22 of the operating member 20.

[0046] The head 71b of the fastening member 71 has a recess 71c such as a hexagonal hole for rotating the fastening member 71, and as shown in Figures 4 and 8, it is arranged inside the second guide long hole 1f of the vertical frame 1a, and can be rotated from the outside of the door body 1.

[0047] The emergency unlocking unit 70 accepts an emergency unlocking operation when an upward or downward force is applied to the head 71b of the fastening member 71. In this embodiment, a long, thin member such as a hairpin or ballpoint pen is inserted into the recess 71c of the head 71b, and when a downward force is applied to the head 71b, the operating member 20 moves downward, the locking member 10 enters the unlocked state, and the emergency unlocking unit 70 accepts the emergency unlocking operation.

[0048] As explained above with reference to Figures 1 to 8, according to the locking device for a door body of the embodiment, the operating member 20 receives an operation to move the locking member 10 up and down, the rod 30 connects the locking member 10 and the operating member 20, the guide member 40 guides the operating member 20, the guided member 50 has a first connecting portion 51 connected to the operating member 20, a second connecting portion 52 connected to the rod 30, and a sliding portion 53 that slides against the guide member 40, and the sliding portion 53 is arranged at a different vertical position on the guided member 50 from the first connecting portion 51.

[0049] By arranging the sliding contact portion 53 at a different vertical position from the first connecting portion 51, the first connecting portion 51, to which operating force is applied via the operating member 20, and the sliding contact portion 53, which is guided by the guide member 40, are separated within the guided member 50, and the size of the sliding contact portion 53 can be made the minimum size necessary to guide the operating member 20, making it possible to make the vertical frame 1a compact so that it can be installed on a door body 1 of a smaller size.

[0050] To explain in more detail, the first connecting portion 51 has a first through-hole 51a formed therein through which a bolt with a relatively large diameter can be inserted in order to secure the operating member 20 to the guided member 50 with sufficient strength, which places restrictions on reducing the thickness, etc. Therefore, by providing the sliding contact portion 53 separately from the first connecting portion 51, the sliding contact portion 53 can be thinned to a thickness necessary and sufficient for guiding the operating member 20, making it easier to reduce the thickness of the guide member 40, which was a bottleneck when reducing the size of the locking device for the door body, and allowing for compactness so that it can be installed on a door body with a smaller size of vertical stile 1a, such as a door body with a smaller width of vertical stile 1a in the door opening and closing direction.

[0051] Furthermore, as explained with reference to Figures 1 to 8, according to the door body locking device of the embodiment, the temporary fixing portion 60 includes a first groove portion 61, a second groove portion 62, and an elastic engagement portion 63, the first groove portion 61 and the second groove portion 62 are formed on one of the guide member 40 and the sliding contact portion 53, and the elastic engagement portion 63 is disposed on the other of the guide member 40 and the sliding contact portion 53, and one of the guide member 40 and the sliding contact portion 53 contains the other.

[0052] In the embodiment, the first groove 61 and the second groove 62 are formed in the guide member 40, which is the one containing the other of the guide member 40 and the sliding contact portion 53, and the elastic engagement portion 63 is disposed in the contained sliding contact portion 53. Therefore, as in the embodiment, it is also possible to dispose the spring 64 of the elastic engagement portion 63 inside the sliding contact portion 53, and an elastic means for elastic engagement can be disposed inside the contained member.

[0053] As a result of the above, the installation of the temporary fixing part 60 can prevent the size of the locking device from increasing, and the door body 1 can be smoothly and reliably engaged, locked to prevent movement, and unlocked. In addition, it is possible to further facilitate compactification so that the vertical stile 1a can be installed on a door body 1 of a smaller size.

[0054] Furthermore, by bringing the guide member 40 and the sliding contact portion 53 into close contact with each other on the inside and outside, and using a steel ball 65 with a small maximum protrusion from the second through hole 53a as the engaging member of the temporary fixing portion 60, the width of the guide member 40 can be further reduced, making it even easier to make it compact so that it can be installed on door bodies with smaller vertical frames.

[0055] 1 to 8, according to the door body locking device of the embodiment, the emergency unlocking unit 70 receives an emergency unlocking operation to move the operating member 20 to set the locking member 10 to an unlocked state from one of both sides of the door body 1 opposite to the side where the operating member 20 is located. Therefore, for example, if the door body 1 is a sliding glass door or the like installed between a changing room and a bathroom, and an emergency such as someone collapsing inside the bathroom occurs, the door can be unlocked from the changing room side, allowing the emergency to be dealt with.

[0056] Furthermore, as in the embodiment, the emergency unlocking unit 70 also serves as the fastening member 71 for fixing the operating member 20, and the emergency unlocking operation is performed by applying an upward or downward force to the head 71b of the fastening member 71, thereby preventing an increase in the number of parts and simplifying installation. Furthermore, the emergency unlocking unit 70 can be made to have a simple structure, reducing the manufacturing cost of the door body locking device.

[0057] In addition, the head 71b of the fastening member 71 is made to be the application part to which force is applied for emergency unlocking operation, and by arranging it inside the second guide long hole 1f as shown in Figure 4, the application part does not protrude from the surface of the vertical frame 1a, making it impossible to unlock it carelessly with one's fingers, and also preventing it from being unintentionally unlocked even if luggage or the like collides with the application part from outside.

[0058] Next, the locking member 10 and the rod 30 will be described in more detail with reference to Figures 9 and 10 and the above-mentioned Figures 1, 4, 7, etc., and the adjustment means 80 and the holding means 90 of the embodiment will be described. Figure 9(a) is a front view showing the locking member of the embodiment. Figure 9(b) is a side view showing the locking member of the embodiment. Figure 9(c) is a top view showing the locking member of the embodiment. Figure 10(a) is a front view showing the rod of the embodiment. Figure 10(b) is a side view showing the rod of the embodiment.

[0059] As shown in Figure 9, the locking member 10 of this embodiment is a long, flat plate arranged in the vertical direction, and has an engagement portion 11, a rotation-preventing portion 12, and a narrow portion 13. Here, "flat shape" refers to a shape in which the thickness is smaller than the width overall. The engagement portion 11 and the rotation-preventing portion 12 are the same thickness, and the narrow portion 13 is thinner than the engagement portion 11 and the rotation-preventing portion 12.

[0060] The engaging portion 11 is disposed on the tip side of the locking member 10, protrudes above or below the door body 1, and engages with the locking recess 2c disposed above or below the door body 1. In the embodiment, the tip side of the engaging portion 11 is narrower than the rotation preventing portion 12, and as shown in Figure 1, in the locked state, it protrudes upward from the vertical stile 1a, is inserted into the locking recess 2c, and engages with the locking recess 2c.

[0061] Furthermore, a tapered portion 11a is formed at the tip of the engaging portion 11, which decreases in thickness and width toward the tip of the locking member 10 to facilitate insertion into the locking recess 2c. The base end 11b of the engaging portion 11 is widened to have the same width as the rotation prevention portion 12, and normally remains inside the stile 1a even in the locked state. However, it is not essential that the base end 11b of the engaging portion 11 always remain inside the stile 1a.

[0062] The rotation prevention portion 12 is disposed on the base end side of the locking member 10 and always remains inside the accommodation space 1b even when the locking member 10 moves between the locked state and the unlocked state, thereby preventing the rotation of the locking member 10. A first female screw 12a opens at the lower end of the rotation prevention portion 12.

[0063] As shown in Figure 9, narrow width portion 13 is narrower in width and thickness than base end portion 11b of engagement portion 11 and rotation-preventing portion 12, and is disposed between engagement portion 11 and rotation-preventing portion 12 so as to integrally connect engagement portion 11 and rotation-preventing portion 12. A U-shaped resin sliding spacer 14 is fitted to narrow width portion 13. By being sandwiched between base end portion 11b of engagement portion 11 and rotation-preventing portion 12, sliding spacer 14 fixes its vertical position relative to locking member 10, allowing locking member 10 to move smoothly up and down, and comes into sliding contact with the peripheral wall of storage space 1b to reduce the noise generated when locking member 10 moves.

[0064] 10, the rod 30 of this embodiment has a first male screw 81 at its upper end and a second male screw 82 at its lower end. A sliding block 91 is attached to the rod 30 at a predetermined position between the first male screw 81 and the second male screw 82 so as to be rotatable integrally with the rod 30. The sliding block 91 has a flattened rectangular parallelepiped shape, is disposed inside the accommodation space 1b, and comes into sliding contact with the peripheral wall of the accommodation space 1b.

[0065] The adjustment means 80 adjusts the amount or length of protrusion of the locking member 10 upward or downward from the door body 1. The adjustment means 80 of this embodiment includes a first male screw 81 and a second male screw 82 provided on the rod 30, a first female screw 12a of the locking member 10, and a second female screw 52a of the guided member 50. The adjustment means 80 of this embodiment adjusts the amount of protrusion of the locking member 10 upward or downward from the door body 1 by adjusting at least one of the amount of screwing of the first male screw 81 into the first female screw 12a and the amount of screwing of the second male screw 82 into the second female screw 52a.

[0066] The holding means 90 holds the amount of protrusion of the locking member 10 adjusted by the adjusting means 80. The holding means 90 of the embodiment includes the rotation preventing portion 12 of the locking member 10 and a sliding block 91.

[0067] The rotation prevention portion 12 serving as the retaining means 90 comes into sliding contact with the peripheral wall of the accommodation space 1b, preventing the rotation of the locking member 10 and maintaining the amount of protrusion of the locking member 10. The sliding block 91 serving as the retaining means 90 comes into sliding contact with the peripheral wall of the accommodation space 1b, preventing the rotation of the rod 30 and maintaining the amount of protrusion of the locking member 10.

[0068] If the rotation prevention portion 12 is configured to prevent the rotation of the locking member 10 and thereby prevent the rod 30 from rotating, the amount of threading of the first male screw 81 into the first female screw 12a is maintained, and the amount of protrusion of the locking member 10 adjusted by the adjustment means 80 is maintained.

[0069] Furthermore, by the sliding block 91 preventing the rotation of the rod 30, the amount of threading of the second male screw 82 into the second female screw 52a is maintained, and as described above, the amount of threading of the first male screw 81 into the first female screw 12a is maintained, and the amount of protrusion of the locking member 10 adjusted by the adjustment means 80 is maintained.

[0070] An example of a procedure for adjusting the protrusion amount of the locking member 10 by the adjusting means 80 will be described below.

[0071] Step 1: With the operating member 20 removed from the guided member 50, the setscrew 40a is loosened to release the guide member 40 from the vertical frame 1a.

[0072] Step 2: Pull out the entire locking member 10 to the outside of the vertical frame 1a through the opening 1c of the storage space 1b, rotate the locking member 10 as many times as necessary, adjust the amount of threading of the first male screw 81 into the first female screw 12a, and adjust the amount of protrusion of the locking member 10.

[0073] Step 3: If the amount of protrusion of the locking member 10 cannot be sufficiently adjusted in the operation of Step 2, pull the rod 30 out of the vertical frame 1a to a position where the sliding block 91 can be grasped, and by rotating the sliding block 91, the rod 30 will rotate together with the locking member 10, adjusting the amount of threading of the second male screw 82 into the second female screw 52a, and adjusting the amount of protrusion of the locking member 10.

[0074] Step 4: While preventing the rod 30 and the locking member 10 from rotating, insert them into the accommodation space 1b, and fix the guide member 40 to the vertical frame 1a with the set screw 40a.

[0075] As explained above with reference to Figures 9 and 10, the adjustment means 80 can adjust the amount of protrusion of the locking member 10 above or below the door body 1, allowing the locking device to be installed on door bodies 1 with various gaps between them and the upper frame 2b or floor.

[0076] Furthermore, by forming a first male screw 81 and a second male screw 82 on the rod 30 instead of a female screw, there is no need to attach, for example, a cylindrical female screw member to the rod 30, which prevents an increase in the number of parts.

[0077] Furthermore, the amount of protrusion can be adjusted by both the first male screw 81 and the second male screw 82, and even if a female screw of sufficient depth for adjusting the amount of protrusion cannot be formed in the locking member 10, a female screw can be formed in the guided member 50 to compensate, and the amount of protrusion of the locking member 10 can be adjusted with a sufficient amount of adjustment for various door bodies 1.

[0078] Furthermore, since the holding means 90 holds the amount of protrusion of the locking member 10 adjusted by the adjustment means 80, the amount of protrusion of the locking member 10 can be held even when an external force is applied, and problems such as the locking member 10 rubbing against the floor or upper frame 2b or being unable to lock the door body 1 due to fluctuations in the amount of protrusion of the locking member 10 caused by vibrations when opening or closing the door body 1 or by a person applying force to the locking member 10 can be prevented.

[0079] Furthermore, since the holding means 90 includes a sliding block 91 that is attached to the exterior of the rod 30 and rotates integrally with the rod 30, the sliding block 91 can be grasped when adjusting the amount of protrusion, making it easy to rotate the rod 30 and adjust the amount of protrusion, making it even easier to adjust the amount of protrusion.

[0080] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 10). However, the present invention is not limited to the above embodiments, and can be embodied in various forms without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0081] 1...Door body 10...Locking member 1a…Stile 20...Operating member 30...Rod 40...Guide member 50...Guided member 53...Sliding contact part 60...Temporary fixing part 61...First groove 62...Second groove 63...Elastic engagement portion 70…Emergency unlocking part

Claims

1. a locking member that moves up and down between a locked state in which the door body is locked and an unlocked state in which the door body is not locked; an operating member that is interlocked with the locking member and receives an operation to move the locking member up and down; a rod connecting the locking member and the operating member; a guide member that guides the operating member; a guided member extending in a vertical direction and having a first connecting portion connected to the operating member, a second connecting portion connected to the rod, and a sliding contact portion disposed at a vertical position different from the first connecting portion and in sliding contact with the guide member; An emergency unlocking section that receives an emergency unlocking operation to move the operating member from one of both surfaces of the door body opposite to the side on which the operating member is disposed so as to set the locking member to the unlocked state. A door body locking device comprising:

2. The locking member further includes a temporary fixing portion that temporarily fixes the locking member in the locked state and the unlocked state, one of the guide member and the sliding contact portion includes the other, 2. The locking device for a door body according to claim 1, wherein the temporary fixing portion includes a first groove portion and a second groove portion formed at positions corresponding to the locked state and the unlocked state on one of the guide member and the sliding contact portion, and an elastic engagement portion disposed on the other of the guide member and the sliding contact portion and elastically engaging with the first groove portion and the second groove portion.

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