Lock device

Abstract

To prevent appearance from becoming worse when a handle pedestal of a lock device is placed over a front plate of a frame and then screwed.SOLUTION: A lock device comprises: a handle pedestal 1 which supports a handle shaft 5 extending forward / backward; a back plate 2 which is arranged on the back of the handle pedestal 1; and a lock body 3 which has a base plate 8 and an arm 9 swinging on the handle shaft 5 relative to the base plate 8. The base plate 8 is placed over the back face of the back plate 2. The handle pedestal 1, base plate 8, and back plate 2 are fastened with a male screw member 4 penetrating the back plate 2 from the front of the handle pedestal 1 to reach the base plate 8.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a locking device for locking a sliding door of a building fixture. [Background technology]

[0002] 2. Description of the Related Art Conventionally, some fixtures, such as sliding windows, are equipped with a shoji screen that is fitted within the frame of the fixture so as to be able to open and close about an axis, and a locking device that engages the frame of the shoji screen with the frame of the fixture.

[0003] One locking device has a handle base that supports a handle shaft extending in the front-rear direction, a back plate that is placed inside the door frame, and a lock body that is placed between the back plate and the handle base (Patent Document 1).

[0004] In the locking device disclosed in Patent Document 1, a handle that is rotated around a handle shaft is disposed on the front of a handle base. The back plate is fixed to the back plate of the door frame and disposed at a position away from the front plate of the door frame. The locking body is composed of an arm that is connected to the handle shaft so as to be rotatable together with the handle shaft, and a first plate member and a second plate member that sandwich the arm. The first plate member and the second plate member are accommodated between the mounting member and the cover member. A unit that accommodates the first plate member and the second plate member of the locking body between the mounting member and the cover member is inserted between the front of the back plate and the front plate of the door frame from a side opening of the door frame. The arm has a protruding end that extends outward from the side opening of the door frame, and this protruding end is adapted to perform an unlocking operation for the shoji frame. Inside the door frame, the first plate member, the second plate member, the mounting member, and the back plate are fastened in the front-back direction by a single short male screw member that is screwed from the front side into a female screw hole of the back plate fixed to the back plate. After this fastening, the handle base is fitted into the front opening of the front panel of the door frame, and the back part located inside the door frame is butted against the front of the first plate member in the forward and backward direction. As a result, inside the door frame, the handle base, the cover member, the first plate member, the second plate member, the mounting member, and the back panel are stacked in the forward and backward direction in that order from the front side. At this time, the handle base is stacked in the forward and backward direction on the front panel of the door frame at the back side of the flange portion formed around the entire circumference. In this stacked state, a single long male screw member is passed through the screw through holes of the first plate member, the second plate member, and the mounting member in the forward and backward direction from the front of the handle base and screwed into the female screw portion of the back panel, thereby fastening the handle base and the back panel together. As a result, the handle base and the lock body are fastened and fixed in the forward and backward direction, and at this time, the back side of the peripheral portion of the handle base is tightened against the front panel of the door frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2023-5494 A Summary of the Invention [Problem to be solved by the invention]

[0006] The locking device of Patent Document 1 is screwed from the handle base to the back plate at a location where four members, the back plate, the mounting member, the second plate member, and the first plate member, are sandwiched between the back plate of the frame and the handle base, so that dimensional errors and assembly errors of these members in the front-back direction overlap, making it difficult to obtain a precise stacking dimension between the front of the back plate of the frame to which the back plate is fixed and the back of the peripheral part of the handle base that is fastened to the front of the front plate of the frame. In particular, since the handle base has a complex shape and has two fastening surfaces in the front-back direction (the fastening surface with the first plate member and the fastening surface with the front plate of the door frame), manufacturing errors of the handle base are likely to affect the accuracy of the stacking dimension. If the stacking dimension becomes smaller than normal, the front plate of the door frame will bend significantly when the handle base is screwed in, resulting in a poor appearance. If the stacking dimensions are larger than normal, a gap will occur between the front of the front panel of the door frame and the back of the flange portion of the handle base, which will not only look unsightly but also increase the possibility of air flowing between the inside of the door frame and the room through the gap.

[0007] In view of the above background, an object of the present invention is to prevent the appearance from being deteriorated when the handle base of the locking device is overlapped with the front plate of the frame and screwed. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a locking device comprising a handle base supporting a handle shaft extending in a forward-backward direction, a back plate arranged behind the handle base, and a locking body having a base plate and an arm that swings around the handle shaft relative to the base plate, the base plate being overlapped on the back surface of the back plate, and the handle base, the base plate and the back plate being fastened together by a male screw member that passes through the back plate from the front of the handle base and reaches the base plate. Configuration 1 is adopted.

[0009] As in the above configuration 1, when the base plate of the lock body is placed on the back of the back plate, and the handle base, back plate, and lock body are fastened together by applying the fastening force of the male screw member to the handle base, back plate, and base plate, the handle base is screwed from the handle base to the base plate at a location where only the two members, the back plate and the base plate, are arranged between the back plate of the frame and the handle base, so that it is possible to obtain a precise stacking dimension between the front of the back plate of the frame to which the back plate is fixed and the back of the peripheral part of the handle base that is fastened to the front of the front plate of the frame. Therefore, according to the above configuration 1, when the handle base is screwed, the front plate of the fitting frame is prevented from being significantly deflected, and a noticeable gap is also prevented from being generated between the front of the front plate and the back of the handle base, so that it is possible to prevent deterioration of the appearance.

[0010] In the above configuration 1, when a direction along a straight line perpendicular to the forward-back direction is defined as a first direction, and a direction perpendicular to the forward-back direction and the first direction is defined as a second direction, the base plate is overlapped on the back surface of the back plate by an insertion operation that moves the base plate in the first direction relative to the back plate, a first position regulating portion that regulates the movement of the base plate in the second direction within a predetermined range is provided on the back side of the back plate, and a second position regulating portion that regulates the movement of the base plate in the first direction by the insertion operation at a predetermined position is provided on the back side of the back plate or on the base plate, and when the base plate is regulated within the predetermined range and at the predetermined position, a screw insertion hole portion for the male screw member formed in the back plate and a female screw portion for the male screw member formed in the base plate are in a state of communication in the forward-back direction.

[0011] According to the above configuration 2, when the base plate of the lock body is inserted onto the rear surface of the back plate, the base plate is simply inserted so that it is restricted by the first position restricting portion and the second position restricting portion with respect to the rear of the back plate, and is then positioned appropriately for fastening with the male screw member. Therefore, when the lock device is assembled into the frame, the positioning of the lock body is easy, and it is not necessary to screw the lock body to the back plate before fixing the handle base.

[0012] In the above configuration 2, configuration 3 can be adopted in which a guide portion is provided on the rear side of the back plate to guide the base plate, which is inserted in a direction inclined relative to the first direction during the insertion operation, so as to move in the first direction while following the rear surface of the back plate.

[0013] According to the above configuration 3, even if the base plate is inserted at an angle relative to the first direction, which is the normal insertion direction, during the aforementioned insertion operation, the base plate is guided by the guide section so as to move in the first direction along the back surface of the back plate, so that the base plate can be reliably positioned overlapping the back surface of the back plate.

[0014] In any one of the above configurations 1 to 3, a configuration 4 can be adopted in which the back plate and the locking body are arranged between the front plate and the back plate of the frame, the back plate is fixed to the back plate, and the back surface of the handle base is overlapped on the front surface of the front plate, and when the male screw member is not inserted from the front surface of the handle base, the handle base and the back plate are arranged to face each other in a non-contact manner with a gap in the forward and backward directions.

[0015] According to the above configuration 4, the handle base and the back plate are arranged in a non-contacting state with a gap between them in the forward and backward directions, and then the handle base is screwed in place with the male screw member. Therefore, when the fastening with the male screw member is proceeded with, excessive buttock between the handle base and the back plate in the forward and backward directions within the frame is prevented from occurring before the back surface of the handle base and the front plate of the frame are tightly attached, thereby ensuring that the back surface of the handle base and the front plate of the frame are tightly attached to each other. Effect of the Invention

[0016] In this way, by employing the above configuration 1, the present invention can prevent deterioration of the appearance when the handle base of the locking device is overlapped with the front plate of the frame and screwed in place. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2A is a vertical cross-sectional side view of a locking device according to a first embodiment of the present invention taken along the line AA in FIG. 2B, and FIG. 2B is a rear view of the locking device in FIG. 2A. [Diagram 2] FIG. 2 is a front view of the locking device shown in FIG. [Diagram 3] FIG. 2 is a plan view of the locking device shown in FIG. [Figure 4] 1. (a) is a side view of the back plate shown in FIG. 1. (b) is a plan view of the back plate shown in FIG. 1. (c) is a front view of the back plate shown in FIG. 1. (d) is a rear view of the back plate shown in FIG. [Diagram 5] FIG. 2 is a plan view showing the operation of the guide portion of the back plate shown in FIG. [Figure 6] FIG. 1A is a side view showing a back plate and a base plate according to a second embodiment of the present invention, and FIG. 1B is a rear view of FIG. [Figure 7] 7A is a plan view showing the operation of the guide portion of the back plate shown in FIG. 6, and FIG. 7B is a plan view showing the back plate and the lock body according to the second embodiment. [Figure 8] 1A is a side view showing a back plate and a base plate according to a third embodiment of the present invention, and FIG. 1B is a rear view of FIG. 1A. [Figure 9] 9A is a plan view showing the operation of the guide portion of the back plate shown in FIG. 8, and FIG. 9B is a plan view showing the back plate and the lock body according to the third embodiment. [Figure 10] 4A is a side view showing a back plate and a base plate according to a fourth embodiment of the present invention, and FIG. 4B is a rear view of FIG. 4A. [Figure 11] 11A is a plan view showing the operation of the guide portion of the back plate shown in FIG. 10, and FIG. 11B is a plan view showing the back plate and the lock body according to the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A locking device according to a first embodiment (hereinafter simply referred to as "this locking device") as one example of the present invention will be described with reference to the accompanying drawings, FIGS. 1 to 5. FIG.

[0019] The locking device shown in Fig. 1 to Fig. 3 is intended for use in locking a shoji screen that can be opened and closed around an axis within the frame of a fixture, such as a vertical sliding window, a horizontal sliding window, or a projection window, and the frame of the shoji screen to the frame of the fixture. In the illustrated example, a rectangular sliding window is assumed as the fixture, and in particular, this locking device is assumed to be installed by utilizing the space within the frame formed between a front panel 101 (see Fig. 1(a) and Fig. 3) and a back panel 102 that constitute one side of the frame of the window frame, among the rectangular frame (frame) of the shoji screen and the rectangular frame (window frame) of the fixture. As shown in Fig. 3, the back panel 102 is combined with the front panel 101 in the front-back direction, is longer in the depth direction than the front panel 101, and extends to the back of the frame 103 of the shoji screen.

[0020] The front of the front panel 101 faces the interior of the room. The back of the back panel 102 faces the wall of the building. The depth direction as a fixture corresponds to the left-right direction in FIG. 1(b), i.e., the up-down direction in FIG. 3. The extending direction of the front panel 101 and the back panel 102 corresponds to the up-down direction in FIG. 1(b) and FIG. 2. When this locking device is viewed from the front-back direction, it has a substantially rectangular shape with its long side in the extending direction of the front panel 101 and the back panel 102 and its short side in the depth direction as shown in FIG. 2. Examples of materials for forming the front panel 101 include resin, aluminum alloy, etc.

[0021] As shown in FIG. 1(a), this locking device comprises a handle base 1, a back plate 2, a lock body 3, and two male screw members 4 for fastening the handle base 1, the lock body 3, and the back plate 2 together.

[0022] The handle base 1 supports a handle shaft 5 that extends in the front-rear direction (left-right direction in FIG. 1(a)). The handle shaft 5 is connected to a handle 6 via a handle pin 7. The handle 6 is disposed on the front of the handle base 1. The handle 6 is provided so as to be movable up and down around the handle pin 7 relative to the handle base 1. The handle 6, which is in a laid-down state as shown by solid lines in FIG. 1(a) and FIG. 2, is stored in a recessed portion at the front of the handle base 1. When the handle 6 is raised up around the handle pin 7 from the laid-down state as shown by the two-dot chain line in FIG. 1(a), it becomes possible to perform a locking / unlocking switching operation by rotating the handle 6 around the handle shaft 5.

[0023] As shown in FIG. 1, the lock body 3 has a base plate 8, an arm 9 that swings around the handle shaft 5 relative to the base plate 8, and a cover 10 that holds the arm 9 together with the base plate 8 in the forward and backward directions.

[0024] The handle base 1 is made of a single seamless member. The material from which the handle base 1 is made is not particularly limited, but examples thereof include resin and aluminum alloy.

[0025] 1(a), 2, and 3, the handle base 1 is formed with a peripheral portion 1a that is fastened in the front-rear direction to the front of the front plate 101. The rear surface of the handle base 1 other than the peripheral portion 1a is inserted from an opening that penetrates the front plate 101 in the front-rear direction and is disposed in the space within the frame described above.

[0026] Screw accommodating portions 1b are formed on the front surface of the handle base 1 at positions above and below the handle shaft 5 (one end side (upper side in Fig. 1(a)) and the other end side (lower side in Fig. 1(a)) in the longitudinal direction). The screw accommodating portion 1b is in the form of a countersunk hole that accommodates the head of the male screw member 4. The bottom surface of the hole of the screw accommodating portion 1b becomes a seat surface that is fastened to the back surface of the head of the male screw member 4.

[0027] The handle shaft 5 is supported by the handle base 1 in a direction perpendicular to the forward and backward direction, and its movement in the forward and backward direction relative to the handle base 1 is restricted by a retaining ring.

[0028] As shown in Figures 1 and 4, the back plate 2 is composed of a single plate material having, without any seams, a pair of fastening plate portions 2a formed in a flat plate shape that is overlapped on the front of the back plate 102, a pair of first position regulating portions 2b formed in a flat plate shape that extends in a direction perpendicular to the fastening plate portions 2a, and a back plate portion 2c extending in a flat plate shape to connect the front sides of the pair of first position regulating portions 2b.

[0029] The material for forming the back plate 2 is not particularly limited, but examples thereof include a stainless steel plate and an aluminum alloy plate.

[0030] The back surface of the fastening plate portion 2a is placed on the front surface of the rear plate 102, so that the fastening plate portion 2a is arranged in a position along the longitudinal direction and the depth direction. With this arrangement, the pair of first position regulating portions 2b are arranged in a position along the longitudinal direction and the depth direction, and the rear plate portion 2c is arranged in a position along the longitudinal direction and the depth direction. In this arrangement, the fastening plate portion 2a is fastened to the front surface of the rear plate 102 in the longitudinal direction by the screw member 11. The rear plate 2 is fixed to the rear plate 102 by screwing the pair of fastening plate portions 2a and the rear plate 102. In the illustrated example, a female screw portion is formed on the rear plate 102 and a screw member is screwed into the female screw portion, but the fixing of the rear plate and the rear plate may be performed as appropriate. For example, it is also possible to change the arrangement so that a female screw portion is formed on the fastening plate portion of the rear plate and a screw member is screwed into the female screw portion of the rear plate from the rear surface of the rear plate.

[0031] The back plate portion 2c has a rectangular plate shape. The first position restriction portions 2b are continuous with the short sides of the back plate portion 2c, and the pair of first position restriction portions 2b face each other in the longitudinal direction.

[0032] 1(b) and 4, the back plate 2 has a pair of guide portions 2d that extend in a tongue-like shape from the first position regulating portion 2b in the longitudinal direction toward the back plate portion 2c. The guide portions 2d are located away from the back surface of the back plate portion 2c in the front-back direction, and form the narrowest gap between the guide portions 2d and the back surface of the back plate portion 2c at one point in the depth direction. The guide portions 2d have a tapered shape that becomes farther away from the back surface of the back plate portion 2c in the front-back direction as it becomes farther away from the narrowest gap in the depth direction.

[0033] 4(a), (c) and (d), the back plate 2 has a shaft through hole portion 2e used for passing the handle shaft 5 in the forward and backward direction, a pair of screw insertion holes 2f used for passing the male screw member 4 in the forward and backward direction, and a pair of screw mouth portions 2g used for passing the screw member 11. The shaft through hole portion 2e and the screw insertion hole portion 2f each pass through the back plate portion 2c in the forward and backward direction, and the screw mouth portions 2g pass through the fastening plate portion 2a in the forward and backward direction.

[0034] When the pair of fastening plate portions 2a are fixed to the rear panel 102 as described above, the entire rear panel 2 is contained within the frame space between the front panel 101 and the rear panel 102 at a position away from the front panel 101, and the open space surrounded on three sides by the pair of first position regulating portions 2b and the rear panel portion 2c is connected in the depth direction to the side opening 101a of the frame shown in Figure 3, and the tapered portions of the pair of guide portions 2d are positioned opposite the side opening 101a in the depth direction.

[0035] As shown in Figures 1 and 3, the base plate 8 of the lock body 3 is composed of a single plate material having, without any seams, a flat sliding plate portion 8a and a pair of second position regulating portions 8b extending in a direction perpendicular to the sliding plate portion 8a.

[0036] The material for forming the base plate 8 is not particularly limited, but examples thereof include a stainless steel plate and an aluminum alloy plate.

[0037] The sliding plate portion 8a is generally rectangular in shape. Both ends of the sliding plate portion 8a in the longitudinal direction extend along the lateral direction. The front surface of the sliding plate portion 8a is placed on the rear surface of the back plate portion 2c of the back plate 2.

[0038] The second position restricting portion 8b is continuous with a longitudinal side portion on one end side of the sliding plate portion 8a in the short side direction, and protrudes backward from the sliding plate portion 8a. The pair of second position restricting portions 8b are disposed at one end side (upper side in Figs. 1(a) and 1(b)) and the other end side (lower side in Figs. 1(a) and 1(b)) in the longitudinal direction of the sliding plate portion 8a.

[0039] The base plate 8 has a pair of female threaded portions 8c penetrating the slide plate portion 8a in the front-rear direction. The male screw member 4 is screwed into the female threaded portions 8c.

[0040] The base plate 8 is also formed with a through hole that fits onto the outer periphery of a shaft cylinder formed on one end of the arm 9. The inner periphery of the shaft cylinder of the arm 9 serves as an engagement portion into which the handle shaft 5 is inserted in the forward and backward directions to engage so as to transmit torque from the handle shaft 5. The shape of the engagement portion may be any suitable shape, such as a D-cut or spline.

[0041] The cover 10 is placed on the back surface of the sliding plate portion 8a so as to maintain the fitted state between the shaft cylinder portion of the arm 9 and the through-hole portion of the base plate 8 and to allow the arm 9 to swing within a predetermined angle range around the handle shaft 5. The means for fixing the cover 10 to the sliding plate portion 8a may be an appropriate fixing structure such as screws or welding, as long as it does not impede the overlap between the front surface of the sliding plate portion 8a and the back surface of the back plate 2.

[0042] The arm 9 is a swinging member for switching between a locked state where the lock can be engaged and an unlocked state where the lock cannot be engaged. The swinging end of the arm 9 on the side opposite the handle shaft 5 extends to one side in the depth direction beyond the base plate 8 and the back plate 2, and protrudes from the side opening 101a of the frame toward the back of the frame 103. In the illustrated example, a pin 104a of a slider 104 arranged to be slidable in the longitudinal direction in front of the extension plate part of the back plate 102 engages with the swinging end of the arm 9 on the side opposite the handle shaft 5, so that the slider 104 moves back and forth in the longitudinal direction in response to the rotation of the arm 9 around the handle shaft 5. At one end of the stroke of its reciprocating movement, the slider 104 engages with a receiving part (not shown) provided on the frame 103 of the shoji screen to prevent the frame 103 from moving relative to the opening side, and at the other end of the stroke of its reciprocating movement, it disengages from the receiving part to allow the frame 103 to move relative to the opening side. In addition, the arm may be a swinging part for switching between a locked state in which it can be engaged and an unlocked state in which it cannot be engaged, and is not limited to a configuration in which the back panel 102 and the frame 103 are indirectly engaged via a slider. As exemplified in Patent Document 1, a receiving part such as a pin may be provided on the frame, and a swinging end part on the opposite handle shaft side of the arm that is sickle-shaped, U-shaped, or the like that corresponds to this receiving part may be used, and the arm may be directly engaged with and disengaged from the receiving part.

[0043] The assembly of this locking device will be described below. Here, it is assumed that a base unit is prepared in advance, in which a handle base 1 supports a handle shaft 5, the handle shaft 5 is prevented from coming off from the handle base 1, and the handle shaft 5 and the handle 6 are connected by a handle pin 7.

[0044] When installing this locking device in a frame, first, each fastening plate portion 2a is fixed to the back plate 102 by a screw member 11 (see Fig. 1(a) and Fig. 3). After this fixing, the front plate 101 and the back plate 102 are combined to form the frame, and the side opening portion 101a of the frame faces the back plate portion 2c of the back plate 2, the pair of first position regulating portions 2b, and the pair of guide portions 2d in the depth direction.

[0045] After this, an insertion operation is performed to move the base plate 8 of the lock body 3 in the depth direction relative to the back plate 2 through the side opening 101a of the frame. This insertion operation causes the base plate 8 to overlap the back surface of the back plate 2. At this time, the lock body 3 is inserted in the depth direction toward the space between the back surface of the back plate portion 2c of the back plate 2 and the front surface of the back plate 102. Ideally, this insertion operation should be performed by inserting the slide plate portion 8a of the base plate 8 straight in the depth direction along the back surface of the back plate portion 2c, but since this is performed through the side opening 101a of the frame, it is difficult for anyone other than an expert to perform ideal insertion, and it is also difficult to complete the insertion operation in an appropriate state for fastening with the male screw member 4, that is, in a state in which the pair of female screw portions 8c of the base plate 8 inserted behind the back plate 2 and the pair of screw insertion hole portions 2f of the back plate 2 are in communication in the front-back direction.

[0046] In this locking device, even if the base plate 8 is inserted in a direction inclined with respect to the depth direction during the insertion operation as shown in Fig. 5, the pair of guide parts 2d guide the base plate 8 to move in the depth direction while following the back surface of the back plate 2. That is, even if the base plate 8 is inserted in such an inclined direction, the plate edge on the insertion tip side of the sliding plate part 8a of the base plate 8 slides on the tapered parts of the pair of guide parts 2d, and as the insertion proceeds, the sliding plate part 8a is guided to a position following the back surface of the back plate part 2c, and after the plate edge reaches the narrowest gap between the guide parts 2d and the back surface of the back plate part 2c, the front surface of the sliding plate part 8a is restricted by the guide parts 2d to move along the back surface of the back plate part 2c in the depth direction.

[0047] During the above-mentioned insertion operation, the sliding plate portion 8a of the base plate 8 is inserted between a pair of first position restriction portions 2b of the back plate 2 (see Figs. 1(b), 3, and 5), and both short sides of the sliding plate portion 8a are guided in the depth direction by these first position restriction portions 2b. Therefore, the longitudinal movement of the base plate 8 is restricted within a predetermined range. This predetermined range is a range in which the pair of female thread portions 8c of the base plate 8 and the pair of screw insertion hole portions 2f of the back plate 2 communicate in the front-rear direction with respect to the longitudinal positional relationship between them.

[0048] In addition, during the above-mentioned insertion operation, as shown in FIG. 3, when a pair of second position restricting portions 8b protruding backward from the long side portion on the rear end side of the base plate 8 in the insertion direction are caught in the depth direction near the long side portion on the rear side of the side opening 101a of the frame, the movement of the base plate 8 in the depth direction is restricted so that it does not proceed any further in the insertion direction. Therefore, the movement of the base plate 8 in the depth direction due to the insertion operation is restricted at a predetermined position. This predetermined position is a position where the pair of female threaded portions 8c of the base plate 8 and the pair of screw insertion hole portions 2f of the back plate 2 communicate with each other in the front-rear direction with respect to the positional relationship in the depth direction between the pair of female threaded portions 8c of the base plate 8 and the pair of screw insertion hole portions 2f of the back plate 2. Naturally, this predetermined position is set so that the movement of the base plate 8 in the depth direction is restricted after the plate edge on the insertion tip side of the slide plate portion 8a reaches the narrowest gap between the guide portion 2d and the back of the back plate portion 2c.

[0049] As described above, in a state where the base plate 8 of the lock body 3 is placed behind the back plate 2 so that the male screw member 4 can be fastened, the back surface of the peripheral portion 1a of the handle base 1 is placed on the front surface of the front plate 101 as shown in Fig. 1(a) and Fig. 3. As a result, the position of the handle base 1 in the forward and backward directions is determined by the contact between the back surface of the peripheral portion 1a and the front surface of the front plate 101, and as shown in Fig. 1, the handle shaft 5 penetrates the shaft through hole portion 2e (see also Fig. 4(a)) of the back plate 2 in the forward and backward directions and engages with the shaft cylinder portion of the arm 9 of the lock body 3, and the pair of holes of the pair of screw accommodating portions 1b, the pair of screw insertion hole portions 2f of the back plate 2, and the pair of female screw portions 8c of the base plate 8 are in a state of communicating in the forward and backward directions, in order from the square direction, and the handle base 1 and the back plate 2 are in a state of facing each other without contact with each other with a gap g in the forward and backward directions.

[0050] In this state, the male screw member 4 passes from the screw receiving portion 1b on the front side of the handle base 1 through the screw insertion hole portion 2f (see also FIG. 4(a)) of the back plate 2 in the forward and backward direction and is screwed into the female screw portion 8c of the base plate 8. The fastening force of the male screw member 4 acts on the handle base 1 and the base plate 8 in a direction that brings the handle base 1 and the base plate 8 of the lock main body 3 closer to each other in the forward and backward direction. As a result, the back plate portion 2c of the back plate 2 fixed to the back plate 102 and the slide plate portion 8a are fastened in the forward and backward direction, and the handle base 1 is fastened to the slide plate portion 8a in the forward and backward direction via the male screw member 4, so that the handle base 1, the base plate 8 of the lock main body 3, and the back plate 2 are fastened together.

[0051] In this way, the points where the handle base 1, the base plate 8 of the lock body 3, and the back plate 2 are fastened in the forward and backward directions are provided on both longitudinal sides of the handle base 1 by a pair of male screw members 4, thereby stably fixing the handle base 1 to the front plate 101.

[0052] In addition, a gap g in the forward / backward direction is provided between the back surface of the handle base 1 and the front surface of the back plate 2, and the male screw member 4 is started to be screwed in while the two members 1, 2 are not in contact with each other in the forward / backward direction, so that the fastening force of the male screw member 4 is reliably applied between the back surface of the peripheral portion 1a of the handle base 1 and the front surface of the front plate 101.

[0053] After the handle base 1 and the lock body 3 are fixed to each other by the pair of male screw members 4, the single male screw member 4, which cannot be concealed by the handle 6 in the laid-down state as shown in Figures 1(a) and 2, is concealed by a cap 12 attached to its screw accommodating portion 1b.

[0054] It is preferable to adopt the above-mentioned base unit in which an O-ring 13 is provided between the handle shaft 5 and the handle base 1. The O-ring 13 enhances the airtightness between the handle base 1 and the handle shaft 5. This prevents air from entering or exiting between the room and the inside of the frame through the space between the handle base 1 and the handle shaft 5.

[0055] As described above, this locking device (see Figures 1 and 3) comprises a handle base 1 supporting a handle shaft 5 extending in the forward and backward directions, a back plate 2 arranged behind the handle base 1, a locking body 3 having a base plate 8 and an arm 9 that swings around the handle shaft 5 relative to the base plate 8, and a male screw member 4 that fastens the handle base 1 and the locking body 3 in the forward and backward directions.

[0056] In particular, this locking device is configured such that the base plate 8 is overlapped on the back surface of the back plate 2, and the handle base 1, the base plate 8, and the back plate 2 are fastened together by a male screw member 4 that penetrates the back plate 2 from the front surface of the handle base 1 and reaches the base plate 8, so that the handle base 1 is screwed from the handle base 1 to the base plate 8 at a location where only the two members, the back plate 2 and the base plate 8, are arranged between the back plate 102 of the frame and the handle base 1. This makes it possible to obtain with high accuracy the stacking dimension between the front surface of the back plate 102 to which the back plate 2 is fixed and the back surface of the peripheral portion 1a of the handle base 1 that is fastened to the front surface of the front plate 101. In other words, the stacking dimension is prevented from becoming excessively small or excessively large. As a result, when the back plate 2 fastened to the front surface of the back plate 102, the base plate 8, and the handle base 1 are screwed together with the male screw member 4, this locking device prevents the front plate 101 from significantly bending toward the back plate 102 from the vicinity of the contact area with the peripheral portion 1a, and also prevents a noticeable gap from being created between the front of the front plate 101 and the back surface of the peripheral portion 1a of the handle base 1. Therefore, this locking device can prevent the appearance from being deteriorated when the handle base 1 is overlapped and screwed onto the front plate 101 of the frame.

[0057] In addition, in this locking device (see Figs. 1, 3, and 4), when a direction along a straight line perpendicular to the front-back direction is defined as a first direction (corresponding to the depth direction and short side direction in the illustrated example) and a direction perpendicular to the front-back direction and the first direction is defined as a second direction (corresponding to the longitudinal direction in the illustrated example), the base plate 8 is overlapped on the rear surface of the back plate 2 by an insertion operation that moves the base plate 8 in the first direction (depth direction and short side direction) relative to the back plate 2, and first position restriction portions 2b, 2b that restrict the movement of the base plate 8 in the second direction (longitudinal direction) within a predetermined range are provided on the rear surface side of the back plate 2, and the movement of the base plate 8 in the first direction (depth direction) by the above-mentioned insertion operation is prevented. The base plate 8 is provided with second position restricting portions 8b, 8b that restrict movement in the forward and backward directions (the short side direction) at a predetermined position, and when the base plate 8 is restricted within the predetermined range and at the predetermined position, the screw insertion hole portion 2f for the male screw member 4 formed in the back plate 2 and the female screw portion 8c for the male screw member 4 formed in the base plate 8 are in a state of communicating in the forward and rear directions, so that when the base plate 8 of the lock body 3 is inserted on the rear side of the back plate 2, the base plate 8 is simply inserted so as to be restricted by the first position restricting portions 2b, 2b and the second position restricting portions 8b, 8b against the rear side of the back plate 2, and is determined to an appropriate position for fastening with the male screw member 4. Therefore, in this lock device, when the lock body 3 is assembled between the front plate 101 and the back plate 102 of the frame, the positioning of the lock body 3 is easy, and it is not necessary to screw the lock body 3 to the back plate 2 within the frame before fixing the handle base 1. If this is not necessary, it is possible to eliminate the operational error of dropping the screw member into the frame when screwing the lock body 3 to the back plate 2, and also to achieve a highly stable fixation of the handle base 1 by fastening the handle base 1 with multiple male screw members 4. If it is not necessary to achieve these objectives, it is also possible to modify the arrangement so that the base plate and back plate of the lock body are screwed into the frame using short screw members before fixing the handle base, and the handle base is fastened together with the base plate and back plate with only one long male screw member.

[0058] In addition, this locking device (see Figures 1, 3, and 5) has guide sections 2d, 2d provided on the back side of the back plate 2 to guide the base plate 8, which is inserted in a direction inclined relative to the first direction (depth direction, short side direction) during the aforementioned insertion operation, so that it moves in the first direction (depth direction, short side direction) while following the back surface of the back plate 2.Therefore, even if the base plate 8 is inserted in a position inclined relative to the first direction (depth direction, short side direction), which is the correct insertion direction, during the aforementioned insertion operation, the base plate 8 is guided by the guide sections 2d, 2d to move in the first direction (depth direction, short side direction) while following the back surface of the back plate 2, so that the base plate 8 can be reliably positioned in a stacked state against the back surface of the back plate 2.

[0059] In addition, in this locking device (see FIG. 1(a)), the back plate 2 and the lock body 3 are disposed between the front plate 101 and the back plate 102 of the frame, the back plate 2 is fixed to the back plate 102, and the back surface of the handle base is overlapped on the front surface of the front plate. When the male screw member 4 is not inserted from the front of the handle base 1, the handle base 1 and the back plate 2 are arranged to face each other in a non-contact manner with a gap g in the front-back direction. Since the handle base 1 is screwed in place with the male screw member 4 from this assembled state, excessive butting of the rear surface of the handle base 1 and the front surface of the back plate 2 in the front-rear direction within the frame is prevented when the fastening with the male screw member 4 is proceeding before the rear surface of the peripheral portion 1a of the handle base 1 and the front surface of the front plate 101 come into close contact with each other, thereby enabling the rear surface of the peripheral portion 1a of the handle base 1 to be securely brought into close contact with the front plate 101, thereby improving the airtightness between the rear surface of the peripheral portion 1a of the handle base 1 and the front surface of the front plate 101. The gap g is necessary before the fastening force of the male screw member 4 acts, but it is not necessary for the gap g to remain when the fixing of the handle base 1 with the male screw member 4 is completed.

[0060] In this locking device, an example is shown in which the guide portion 2d extends tongue-like from the first position regulating portion 2b, and an example is shown in which the second position regulating portion 8b is provided on the base plate 8, but the guide portion can be provided in other forms, and the second position regulating portion can be provided on the back side of the back plate. As an example, a second embodiment is shown in Figures 6 to 7. Note that, here, only the differences from the first embodiment are described, and the same reference numerals are used for corresponding components in members corresponding to the first embodiment.

[0061] The guide portion 2d according to the second embodiment is composed of a hanging plate portion extending from the first position restricting portion 2b along the longitudinal direction (second direction) toward the back plate portion 2c, and a slanted plate portion extending from the back plate portion 2c side of the hanging plate portion in a direction inclined with respect to the short side direction (first direction, depth direction). The guide portion 2d of this type is more flexible than the first embodiment when guiding the base plate 8 inserted in a direction inclined with respect to the short side direction (first direction, depth direction), and exhibits a spring property like a clip, so that the base plate 8 can be pressed against the back surface of the back plate portion 2c of the back plate 2.

[0062] Moreover, the back plate 2 according to the second embodiment has a second position restricting portion 2h extending rearward along the front-back direction from the long side portion of the back plate portion 2c. During the above-mentioned insertion operation, the leading edge of the base plate 8 in the insertion direction, which is inserted in the short side direction (first direction), abuts against the second position restricting portion 2h protruding from the back side of the back plate 2, so that the second position restricting portion 2h can restrict the movement of the base plate 8 in the short side direction (first direction) to a predetermined position.

[0063] In the above-mentioned first and second embodiments (see Figs. 1 and 6), examples have been shown in which the guide portion 2d is seamlessly formed on the back plate 2, but it is also possible to provide the guide portion separately from the plate member forming the back plate and attach it to the back plate to provide the guide portion on the back side of the back plate. As an example of this, a third embodiment will be described with reference to Figs. 8 and 9. Note that the third embodiment is an example further modified from the second embodiment, so here, only the changes from the third embodiment will be described.

[0064] The guide portion 14 according to the third embodiment is made of a member attached to the first position regulating portion 2b of the back plate 2. The guide portion 14 has a tapered surface portion 14a inclined with respect to the short side direction (first direction, depth direction) and a pair of bending claw portions 14b engaged with a claw hole portion penetrating the first position regulating portion 2b in the longitudinal direction (second direction). The tapered surface portion 14a faces the back surface of the back plate portion 2c in the front-rear direction, and guides the base plate 8, which is inserted in a direction inclined with respect to the short side direction (first direction, depth direction), to proceed in the short side direction (first direction, depth direction) while following the back surface of the back plate portion 2c during the above-mentioned insertion. The guide portion 14 is preferably made of a resin member, for example, in order to improve the sliding property when it comes into contact with the base plate 8. It is also possible to change the first embodiment to a guide portion as in the third embodiment.

[0065] In the above-mentioned first embodiment, an example was shown in which the second position restricting portion 8b provided on the base plate 8 (see Figs. 1 and 3) restricts the movement of the base plate 8 by engaging with the frame, but when the second position restricting portion is provided on the base plate, it is also possible to restrict the movement by engaging with the back plate. As an example of such an example, a fourth embodiment is shown in Figs. 10 to 11. Note that since the fourth embodiment is an example modified from the first embodiment, only the differences from the first embodiment will be described here, and the same reference numerals will be used for the corresponding components in the members corresponding to those in the first embodiment.

[0066] The base plate 8 according to the fourth embodiment has a pair of second position restricting portions 8b protruding in the longitudinal direction so as to face the first position restricting portions 2b of the back plate 2 in the lateral direction (first direction, depth direction). During the above-mentioned insertion operation, the second position restricting portions 8b of the base plate 8 inserted in the lateral direction (first direction) abut against the first position restricting portions 2b of the back plate 2, so that the second position restricting portions 8b can restrict the movement of the base plate 8 in the lateral direction (first direction) to a predetermined position. In the case of the fourth embodiment, since the second position restricting portions 8b restrict the movement by abutting against the back plate 2, it is possible to accommodate the second position restricting portions 8b within the frame at the above-mentioned predetermined position and make them inconspicuous outside the frame.

[0067] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, and it is intended to include all modifications within the scope and meaning equivalent to the claims. [Explanation of symbols]

[0068] 1 Handle base 2 Back plate 2b First position regulation part 2h, 8b Second position regulation part 2d, 14 Guide section 2f Screw insertion hole 3 Lock body 4 Male threaded member 5 Handle shaft 8 Base Plate 8c Female thread 9 Arm 101 Front plate 102 Back plate g Gap

Claims

1. A handle base that supports a handle shaft extending in the front-rear direction; A back plate disposed behind the handle base; A lock device comprising: a lock body having a base plate and an arm that swings around the handle shaft relative to the base plate, The base plate is adapted to be overlapped on the rear surface of the back plate, A locking device in which the handle base, the base plate and the back plate are fastened together by a male screw member that penetrates the back plate from the front side of the handle base and reaches the base plate.

2. When a direction along a straight line perpendicular to the forward-back direction is defined as a first direction, and a direction perpendicular to the forward-back direction and the first direction is defined as a second direction, the base plate is overlapped on the back surface of the back plate by an insertion operation that moves the base plate in the first direction relative to the back plate, a first position regulating portion that regulates the movement of the base plate in the second direction within a predetermined range is provided on the back side of the back plate, and a second position regulating portion that regulates the movement of the base plate in the first direction by the insertion operation at a predetermined position is provided on the back side of the back plate or on the base plate, 2. The locking device according to claim 1, wherein when the base plate is restricted within the specified range and at the specified position, a screw insertion hole portion for the male screw member formed in the back plate and a female screw portion for the male screw member formed in the base plate are in a state of communication in the forward and rearward directions.

3. 3. The locking device according to claim 2, wherein a guide portion is provided on the rear side of the back plate to guide the base plate, which is inserted in a direction inclined relative to the first direction during the insertion operation, so as to move in the first direction while following the rear surface of the back plate.

4. 4. The locking device according to claim 1, wherein the back plate and the locking body are disposed between the front plate and the back plate of the frame, the back plate is fixed to the back plate, and the back surface of the handle base is overlapped on the front surface of the front plate. When the male screw member is not inserted from the front of the handle base, the handle base and the back plate are arranged to face each other without contact with each other with a gap in the forward and backward directions.

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