JP7539281B2 - Locks and fittings - Google Patents

Description

This disclosure relates to locking devices and fixtures.

Conventionally, fixtures such as windows and doors are equipped with locking devices that can lock and unlock fixtures by rotating a handle via a base that is fixed to the fixture. Locking devices such as crescent locks and cam latch handles generally have a base that is fixed to the fixture with screws or the like (see, for example, Patent Document 1). The locking device described in Patent Document 1 has two screw covers that cover the screw parts in addition to the base body to prevent the screws from being exposed and improve the design.

There is also a known locking device that has a screw cover that is slidably attached to a base and covers and conceals the screws by sliding the screw cover. For example, a groove is formed on the side of the base, and an engagement part that engages with the groove is formed on the screw cover, and the engagement part slides along the groove to open and close the screw cover.

Japanese Patent Application Publication No. 8-28114

In the above locking device, when opening the screw cover from the closed state, the screw cover can be opened by pinching the side of the screw cover and sliding it in a pulling motion. However, because the engagement portion for holding the screw cover in the closed state is formed on the side of the base, pinching the side of the cover too hard can catch the engagement portion, preventing the screw cover from being opened.

The present disclosure provides a locking device having a base fixed to a fixture at a fixed portion, an operation portion rotatably attached to the base and capable of locking and unlocking the fixture by a rotational operation, and a cover member attached to at least one end of the base so as to be slidable relative to the base and configured to be switchable between a closed state in which at least the fixed portion of the base is covered and an open state in which the base is exposed by the sliding movement, in which in the closed state, the cover member engages with an engaged portion provided on the end surface of the base to maintain the closed state, and in the open state, the cover member engages with an engaging portion provided on the side surface of the base to maintain the open state.

FIG. 13 shows a locking device attached to a fixture. FIG. FIG. FIG. FIG. 13 is a diagram showing the base before the cover member is attached. FIG. 4 is a view showing the locking device with the cover member in an open state. 13 is a diagram showing the appearance of the cover member and the base in a closed state. FIG. FIG. 13 is a diagram showing the cover member and the base in an open state.

First Embodiment
As shown in Fig. 1, the locking device 2 of this embodiment is attached to the joint frame of two shoji screens 11 and 12 that constitute a fitting 1 such as a window or door, and is configured to be able to lock and unlock the fitting. As shown in Fig. 2, the locking device 2 has an operation unit 3 for locking and unlocking the fitting 1 by a rotation operation, a base cover 4 that covers the entire base 5, a base 5 that is fixed to the fitting 1, a connecting unit 6 that connects the base 5 and the operation unit 3, and a crescent receiver 7 for locking and unlocking the fitting 1 together with the operation unit 3. In Fig. 1, the operation unit 3, base cover 4, and base 5 of the locking device 2 are fixed to the side of the joint frame of one shoji screen 11, and the crescent receiver 7 is fixed to the front of the joint frame of the other shoji screen 12. In Figs. 1 and 2, the base 5 is covered by the operation unit 3 and the base cover 4 and is not exposed.

The operating unit 3 has an operating handle 31, a crescent 33 that engages with the crescent receiver 7 to lock the fixture 1, and a sub-lock 34 and locking mechanism 35 that prohibit rotation of the operating handle 31 and the crescent 33. The operating unit 3 can be rotated 180° clockwise from the state shown in FIG. 1 around a rotating shaft 61 (described below). The operating unit 3 is preferably strong because it is repeatedly loaded with loads associated with the locking/unlocking and opening/closing of the fixture 1. The operating unit 3 is preferably made of nylon containing glass fibers or metal parts, for example.

The crescent 33 has an arc-shaped shape as shown in Figure 2. The crescent receiver 7 is attached to the front side of the shoji screen 12 and has an engagement portion that engages with the crescent 33. In this embodiment, the fixture 1 is a sliding shoji screen. With the shoji screen closed, the operating unit 3 is rotated to the angle shown in Figure 1, causing the crescent 33 to engage with the crescent receiver 7 and restraining the fixture 1 from moving left or right, and locking the shoji screen so that it cannot be opened.

The base cover 4 of the locking device 2 of this embodiment is composed of two cover members 40. There are no particular limitations on the material that composes the cover members 40. The cover members 40 can be composed of, for example, resin, and are preferably water-resistant since they are expected to come into contact with water droplets generated by condensation. As shown in Figures 3A and 3B, the two cover members 40 have a shape that constitutes the four sides of an approximately rectangular parallelepiped with a top surface portion 41, a side surface portion 42, and an end surface portion 43, and can accommodate and cover approximately half of the base 5 inside. As shown in Figures 1 and 2, the two cover members 40 are butted together and are configured to cover half of the approximately rectangular base 5 each.

That is, the two cover members 40 are configured to cover the entire base 5, one of which is fixed to the shoji screen 11, with five faces of the approximately rectangular parallelepiped together. As a result, the base 5 is not visible to the user when viewed from the front or side of the locking device 2 , as shown in Fig. 2, and only the cover members 40 are exposed. Therefore, even if the cover members 40 discolor due to aging, there will be no difference in color between them and the base 5, improving the design of the locking device 2.

In this embodiment, the cover member 40 covering the entire base 5 only needs to cover the base 5 to an extent that the base 5 is not visible in the front and side views of the locking device 2. The side view of the locking device 2 means that the locking device 2 is viewed from the direction in which the sub-lock 34 is located in Fig. 1. The front view of the locking device 2 means that the locking device 2 is viewed from the direction in which the operating handle 31 is located in Fig. 1.

In this embodiment, the two cover members 40 are butted against each other at the center of the base, and have a seam. The seam is hidden by the operating unit 3 and is not exposed when viewed from the front or side of the locking device 2. That is, when viewed from the side of the locking device 2 , the seam between the two cover members 40 is hidden by the sublock 34 and is not visible, and when viewed from the front of the locking device 2 , the seam between the two cover members 40 is hidden by the operating handle 31, the crescent 33, etc. This improves the design of the locking device 2.

The two cover members 40 do not necessarily have to be directly butted against each other. Even if there is a gap between the two cover members 40 and part of the base 5 is exposed, if the base 5 is hidden by the sublock 34 when viewed from the side of the locking device 2 and by the operating handle 31, the crescent 33, or the like when viewed from the front , part of the base 5 will not be visible.

Furthermore, a part of the base 5 may be exposed on the surface of the locking device 2 facing the shoji screen 12. This is because the part of the base 5 exposed on the back surface of the fitting 1 cannot be seen.

The two cover members 40 may be made of the same material and color as the operating unit 3. This is to unify the appearance and improve the design. Furthermore, the crescent 33 and the sub-block 34 may also be made of the same color.

The cover member 40 further has a protruding open engagement portion 44 formed on the surface of the side surface portion 42 that covers the base 5, and a protruding closed engagement portion 45 formed on the surface of the end surface portion 43 that covers the base 5. The open engagement portion 44 is assembled so as to engage with the groove portion 52 of the base 5, as shown in Figures 4 and 5.

The cover member 40 can be opened and closed by sliding along the groove portion 52. That is, when the cover member 40 is slid open and closed, the open engagement portion 44 engages with the groove engagement portion 53 of the base 5, thereby holding the cover member 40 in the open state. The open state is a state in which the base 5 is exposed as shown in FIG. 5, and the closed state is a state in which the entire base 5 is covered as shown in FIG. 2. In the closed state, the closed engagement portion 45 of the cover member 40 engages with the engaged portion 55 of the base 5 to hold the closed state.

The cover member 40 has a recess 46 into which the rotating shaft portion 61 of the connecting portion 6 is inserted when the cover member 40 is attached to the base 5 and closed. This allows the base 5 to be covered up to the side where the rotating shaft portion 61 is located, improving the design of the locking device 2.

The base 5 is composed of a metal back plate member that is fixed to the fixture 1 with screws. The base 5 is fixed to the fixture 1 by fastening it with screws via the fixing portion 51. The base 5 further has a groove portion 52 for assembling the cover member 40, and a groove engagement portion 53 is formed in the groove portion 52.

The base 5 further has a connecting portion 6 between the two fixing portions 51 that connects the base 5 and the operating portion 3. The connecting portion 6 is composed of a rotating shaft portion 61, a support portion 62 that is crimped and fixed to the base 5 and supports the rotating shaft portion 61, a handle attachment portion 63 to which the operating handle 31 is attached, and a stopper 64 (not shown) that is disposed on the back surface of the base 5 and limits the rotation angle of the operating handle 31.

That is, the roughly rectangular handle attachment portion 63 engages with the operating handle 31, so that the rotation of the operating handle 31 can be transmitted to the rotating shaft portion 61. Similarly, for the stopper 64, the base side end of the rotating shaft portion 61, which has a roughly rectangular shape, engages with the stopper 64, which has a roughly rectangular hole, and the stopper 64 rotates in response to the rotation of the rotating shaft portion 61. When a part of the rotated stopper 64 collides with the base 5, further rotation is restricted, and the rotation range of the operating handle 31 is limited.

The locking mechanism 35 is activated by the operation of the sublock 34 and restricts the rotation of the approximately rectangular handle attachment portion 63 shown in FIG. 4. This locks the rotation of the operating handle 31, preventing small children or the like from rotating the operating handle 31 to lock or unlock the fixture 1.

As shown in FIG. 6, when the cover member 40 is in a closed state covering the base 5, the closed engagement portion 45 of the cover member 40 fits into the engaged portion 55 of the base 5, thereby holding the cover member 40 in place. The open engagement portion 44 does not engage with the base 5 in the closed state.

From the closed state shown in FIG. 6, by pinching both side portions 42 of the cover member 40 and pulling them to the right side of the page, the cover member 40 slides against the groove portion 52 of the base 5 to an open state in which the base 5 is exposed. The closing engagement portion 45 is configured to disengage from the engaged portion 55 by this pulling operation. This allows the cover member 40 to be freely opened and closed.

As shown in FIG. 7, the open engagement portion 44 of the cover member 40 is engaged and held in the groove engagement portion 53 of the base 5 in the open state. This means that there is no need to completely remove the cover even in the open state, so the screws can be opened and closed without having to continue holding the cover member 40 by hand, and the engagement between the crescent 33 and the crescent receiver 7 can be adjusted.

As described above, the open engagement portion 44 of the cover member 40 does not engage with the base 5 in the closed state. The close engagement portion 45 for holding the cover member 40 in the closed state is formed on the end surface portion 43, and is not formed on the side surface portion 42. Therefore, even if the cover side is pinched, the open engagement portion 44 does not interfere with the engagement portion in the closed state, making it easy to open and close the cover member 40.

In addition, there is a space between the side surface 42 of the cover member 40 and the groove 52 of the base 5 for the opening engagement portion 44 to slide. As a result, when the side surface 42 of the cover member 40 is pinched firmly, the closing engagement portion 45 bends inward, making it easier to disengage from the engaged portion 55, and making it easier to open and close the cover member 40.

The above describes the locking device 2 of this embodiment. The locking device 2 provides the following advantages:

The locking device 2 has a base 5 fixed to the fixture 1 at the fixed part 51, an operating part 3 rotatably attached to the base 5 and capable of locking and unlocking the fixture 1 by a rotation operation, and a cover member 40 attached to at least one end of the base 5 so as to be slidable relative to the base 5, and configured to be switchable between a closed state in which at least the fixed part 51 of the base 5 is covered and an open state in which the base 5 is exposed by the sliding movement. In the closed state, the cover member 40 holds the closed state by engaging with an engaged part 55 provided on the end surface of the base 5, and in the open state, the cover member 40 holds the open state by engaging with a groove engaging part 53 provided on the side surface of the base 5. As a result, the closing engaging part 45 for holding the cover member 40 in the closed state is formed on the end surface part 43 and is not formed on the side surface part 42. Therefore, even if the cover side is pinched, the opening engaging part 44 does not interfere with the engaging part in the closed state, making it easy to open and close the cover member 40.

The side surface of the base and the inner surface of the cover member each have an engagement portion that engages with each other when the cover member is in the open state. This eliminates the need to completely remove the cover even in the open state, allowing the screws to be opened and closed without having to hold the cover member 40 by hand, and allows adjustment of the engagement between the crescent 33 and the crescent receiver 7.

There is a space between the side of the base and the inner surface of the cover member. This means that there is no need to completely remove the cover even in the open state. When the side surface 42 of the cover member 40 is pinched firmly, the closing engagement portion 45 bends inward, making it easier to disengage from the engaged portion 55, and making it easier to open and close the cover member 40.

The fixture 1 has a locking device 2. This allows the cover member 40 to be opened and closed easily, and the fixture 1 can be provided with easy adjustment of the engagement between the crescent 33 and the crescent receiver 7.

The locking device of this embodiment is not limited to the above-mentioned aspects. For example, it may be applied to a cremone lock or a cam latch handle, rather than a crescent lock as in the above-mentioned embodiment. The locking device of this disclosure can also be applied to various fixtures, such as back door doors and terrace doors.

DESCRIPTION OF SYMBOLS 1... Fittings, 2... Locking device, 3... Operation part, 31... Operation handle, 33... Crescent, 34... Sub-lock, 35... Lock mechanism, 4... Pedestal cover, 40... Cover member, 41... Upper surface part, 42... Side part, 43... End face part, 44... Open engagement part, 45... Close engagement part, 5... Pedestal, 51... Fixed part, 52... Groove part, 53... Groove engagement part, 55... Engaged part, 6 ...Connection part, 61...Rotating shaft part, 62...Support part, 63...Handle attachment part, 64...Stopper, 7...Crescent receiver

Claims (4)

A base that is fixed to the fixture at a fixing portion;
An operation unit that is rotatably attached to the base and can lock and unlock the fixture by a rotation operation;
A locking device having a cover member that is slidably attached to at least one end side of the base and is configured to be switchable between a closed state that covers at least the fixed portion of the base and an open state that exposes the base by the sliding movement,
In the closed state, the cover member is maintained in the closed state by engaging only with an engaged portion provided on an end surface portion of the base, thereby forming a locking device. 2. The locking device according to claim 1, wherein a side surface of the base and an inner surface of the cover member each have an engagement portion that engages with each other when the cover member is in the open state. The locking device according to claim 1 or 2, wherein there is a space between the side portion of the base and the inner surface of the cover member. A fixture equipped with a locking device according to any one of claims 1 to 3.

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