JP2003064925A - Lock for sliding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock for a sliding door, which is simple in structure, low in cost, excellent in strength, correct and smooth in operation, has component members being commonly applicable to a lock with a large backset, and copes with the mounting tolerance of a bracket. SOLUTION: According to the lock for the sliding door, an inner surface of each of side plates 3 of a lock case 1 has a guiding long groove 7 formed therein, which extends from the rear to the front of each side plate and then is curved upward or downward at its front portion. A hook member 8 has a rearward extending horizontal portion 10 at its rear end, which has a guiding pin 11 at its center portion and a connecting pin 12 at a location near a rear end thereof. Then, both the pins are engaged with the guiding long groove, and the connecting pin is connected to a hub 5. When the lock for the sliding door is applied to the lock case having a large backset, the hook member 8 per se is the same as in the lock case having the ordinary backset, and an auxiliary plate is axially supported by the connecting pin 12 at the rear portion of the horizontal portion, in a rotatable manner, which is connected to the hub by a second connecting pin arranged at a rear portion of the auxiliary plate. The other component members are the same as in the lock case having the ordinary backset.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door lock, and more particularly, to a tubular sickle lock for a sliding door, which has a simple structure and a small number of parts,
It is small in size, does not occupy space for mounting, operates smoothly, and can be securely locked even if there is some deviation in the mounting position with the receiving metal fitting.

[0002]

2. Description of the Related Art A sliding door lock, that is, a hub in a lock case is rotated by an operating member to project a sickle member forward so that the sickle member is hooked on a receiving bracket of a door frame body, and is retracted to lock it. There are various types of locks that can be disengaged. And, as the same tubular type sickle lock as the present invention,
For example, there is one described in Japanese Patent Laid-Open No. 10-25937. The gist of the configuration is, as described in claim 1 of the claims, "a rotary cam linked to a thumb turn or a door handle, a link linked to the cam, and a link rotatably linked to the link. Also, in a sliding door lock including a sickle that is retractably mounted in the lock case, the link and the sickle are housed in the lock case so that they can move substantially parallel to each other, and an engaging portion that can engage with the sickle is provided in the front part of the lock case. It is a sliding door lock provided with the sickle rotatable through the engagement of the engaging portion and the sickle. "

An example thereof is shown in FIGS. 1 to 8 of the publication, in which the first is a pin at the front end of the link, which pushes the link connected to the link by the rotation of the rotary cam. The sickle pivotally attached to the sickle is also pushed forward, and the oblique guide surface at the lower center of the sickle is pushed up by engaging with the opening edge of the insertion hole in the center of the front plate, The sickle pivots upward with the pin as a fulcrum, and the locking claw at the tip engages with the inner edge of the opening. And the second one is
The link connected to this is pushed forward by the turning of the turning cam, the sickle pivotally attached to the pin at the front end of the link is also pushed forward, and the convex portion at the position above the rear end of the sickle is pushed. The sickle is engaged with a stopper pin near the front part of the lock case to encourage the sickle to rotate upward, and the convex portion at the rear end of the lower end engages with the stopper at the front end part of the lock case to rotate the sickle. The locking claw at the tip engages with the inner edge of the opening.

[0004]

By the way, although the sliding door lock described in the above publication has a simplified structure,
The link that connects the rotating cam (referred to as a hub in the present invention) and the sickle (referred to as a sickle member in the present invention) is an essential component, and the structure of the rotating cam requires a complicated shape. It affects the increase of material cost and manufacturing cost. When the sickle is in operation, the sickle moves forward through the link by the rotation of the rotation cam, and the slanted guide surface at the lower center of the sickle at the front of the lock case is the opening edge of the insertion hole at the center of the front plate. Or the convex portion at the upper position of the sickle rear end is engaged with the stopper pin, and the convex portion at the rear end of the lower end is engaged with the stopper to be pushed up.

Therefore, the forward movement of the sickle is not always smooth, and the rotation of the sickle always rotates smoothly if the slanted guide surface is engaged with the opening edge of the insertion hole. It doesn't always work. Moreover, even if the convex portion above the rear end of the sickle engages with the stopper pin and the convex portion at the rear end of the lower end engages with the stopper, it is hard to say that the sickle can rotate smoothly by itself. There is no guarantee that trouble will not occur depending on the condition. Further, since the rear end of the sickle is rotatably supported by the link, the total length of the sickle is shortened by the amount of the link in the lock case. Therefore, the distance from the locking claw at the tip of the sickle to the shaft fulcrum is short, and the vertical movement width of the locking claw at the tip when the sickle rotates around the fulcrum is small. If there is an error in the mounting position between the two, the locking claw may not be able to engage with the inner edge of the receiving fitting.

Further, in the above-mentioned device, when the sliding door is forcibly opened in a locked state in which the sickle is hooked on the receiving metal fitting, the external force of the sickle is from the sickle to the pin / link / rotating cam. However, there is a problem in that the strength of each part becomes a problem, and reliability may be somewhat difficult. SUMMARY OF THE INVENTION The present invention is directed to solving the above-mentioned problems of conventional tubular type sickle locks for sliding doors. That is, the object of the present invention is to reduce the cost by further reducing the number of parts with a simple structure, to save space for installation and to have excellent strength, and to ensure that the operation is always accurate and smooth. Further, it is an object of the present invention to provide a sliding door lock in which even if there is an error in the mounting position of the receiving metal fitting, it can be locked sufficiently and locked securely.

[0007]

The first one of the sliding door locks according to the present invention is a guide long groove portion 7 on the inner side surfaces of both side plate portions 3 of the lock case 1 which face each other from the rear side toward the front. And a curved portion 17 is formed upward or downward near the front of each of the long groove portions 7, and a hook-shaped portion 9 is formed at the tip.
A sickle member 8 having a sickle member 8 is formed with a horizontally elongated portion 10 rearward, a guide pin 11 is provided near the center of the horizontally elongated portion 10 and a connecting pin 12 is provided near the rear end. , 12
Section that engages the guide long groove portion 7 with the connecting pin 12 connected to the hub 5 and presses the locking outer peripheral portion 26 so that the rotation of the hub 5 can be locked at a specific position. The spring 13 is provided.

In the second type of sliding door lock according to the present invention, the guide long groove portions 7 are formed on the opposite inner side surfaces of the both side plate portions 3 of the lock case 1 from the rear side toward the front. At the same time, a curved portion 17 is formed upward or downward near the front part of each long groove portion 7, and a laterally elongated portion 10 is formed rearward on the sickle member 8 having a hook-shaped portion 9 at the tip thereof. Profile 10
A guide pin 11 is laterally provided near the center, and a connecting pin 12 is provided at a rear portion thereof to rotatably support an auxiliary plate 14 for backset extension, and a second pin is provided near a rear portion of the auxiliary plate 14.
The connecting pin 15 of FIG. 2 is installed side by side and connected to the hub 5, the pins 11, 12 and 15 are engaged with the guide long groove portions 7, respectively, and the rotation of the hub 5 can be locked at a specific position. Further, a section spring 13 for pressing the locking outer peripheral portion 26 is provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the above construction, the difference in construction between the first invention and the second invention in the above-mentioned sliding door lock is due to the size of the backset. If the back set is a normal one, the sliding door lock of the first invention is used. If the back set is large, that is, the position of the hub 5 in the lock case 1 is determined by the type of operation member such as the sliding door 16, the knob, and the lever handle. When it is necessary to move it to the rear of the normal position, the sliding door lock of the second invention may be used.

In the case of a large backset, the sliding door lock may be manufactured by manufacturing all the parts including the sickle member separately from the ordinary sliding door lock, but this is costly. Therefore, in the sliding door lock of the second aspect of the invention, the lock case 1 is longer than that of the first sliding door lock (see, for example, FIG.
1), the sickle member 8 itself is the same as that of the first invention, but the connecting pin 12 is provided on the rear portion of the laterally elongated portion 10.
The auxiliary plate 14 for enlarging the back set is connected with, and the second connecting pin 15 at the rear portion of the auxiliary plate 14 is engaged and connected with the hub 5.

In the sliding door lock of the first and second inventions, the guide long groove portion 7 formed in the both side plate portions 3 of the lock case 1 has the curved portion 17 near the front portion, and the laterally long portion 10 of the sickle member 8 is provided. The guide pin 11 laterally installed on the rail engages and moves upward or downward along the guide pin 11, whereby the hook-shaped portion 9 at the tip pivots upward or downward and can be hooked in the receiving metal fitting 20. It is formed into a shape. Like the conventional hub 5, the hub 5 can be rotated by inserting a square shaft 18 such as a knob or a lever handle as an operating member provided on the inner and outer surfaces of the sliding door 16 into the square hole 25. The hub 5 is engaged and connected with the connecting pin 12 in the sliding door lock of the first invention and with the second connecting pin 15 in the sliding door lock of the second invention. For example, forming a bifurcated portion on the hub 5,
The pins 12 and 15 may be engaged.

As the section spring 13, for example, a coil spring or a leaf spring may be used, and at least one side end thereof is locked in the lock case 2 and the locking outer peripheral portion 26 of the hub 5 is pressed to inadvertently. It prevents the rotation. In the manufacture of the above-mentioned sliding door lock, it is desirable that the lock case 1 is die-cast, and in particular, the front plate 2 and one side plate part 3 are integrally formed, and the other side plate part 3 is superposed thereon. Of course, it is desirable that the sickle member 8 is used by joining two steel plates, but the invention is not limited to this. The sickle member 8 is composed of a hook-shaped portion 9 at the tip and a laterally elongated portion 10 continuing to the rear, but the hook-shaped portion 9 is preferably formed longer than the conventional one.

In the sliding door lock of the second invention, the lock case 1 is different from that of the sliding door lock of the first invention (see FIG. 11). As the operating pin 11, the connecting pin 12, the section spring 13 and the like, those of the sliding door lock of the first invention may be used as they are. The second connecting pin 15 may be the same as the guide pin 11 or the connecting pin 12. The sliding door lock according to the present invention is mounted in the same manner as the conventional sliding door lock of this type by inserting the lock case 1 into the recess formed from the front end surface of the sliding door 16 and by attaching the front plate 2 and the front plate 3 to each other.
1 is screwed to the front end surface of the sliding door 16, and a hole is provided in the side surface of the sliding door 16 corresponding to the position of the square hole of the hub 5, and the shaft portion 6 of the operating member such as a knob or a lever handle is formed from the hole. 5 may be inserted into the square hole 25 and the seat plate of the operation member may be screwed.

At the time of mounting, if the sliding door lock of the first invention cannot be mounted due to the large backset due to the type of the sliding door 16 and the operating member, the sliding door lock of the second invention may be mounted. . The operating state of the above-described sliding door lock of the present invention is as follows. First, when the sliding door 1 is closed and locked, after closing the sliding door 16 with the sickle member 8 retracted into the lock case 1 (see, for example, FIG. 1), the operating members such as the knob and the lever handle are locked. Rotate in the direction. The hub 5 in the lock case 1 rotates via the angular axis 18 of the operation member (clockwise in the illustrated example).
However, in the sliding door lock of the first invention, the connecting pin 12 near the rear of the sickle member 8 is used, and in the sliding door lock of the second invention, the second connecting pin 12 and the auxiliary plate 14 are used. Thus, the sickle member 8 is pushed forward (to the left in the illustrated example).

In any of the above cases, the guide pin 11 provided laterally near the center of the horizontally long portion 10 of the sickle member 8 engages with the long guide groove 7 formed on the inner surface of the side plate portion 3 of the lock case 1. Therefore, the sickle member 8 first moves straight forward along the long groove portion 7. By this forward movement, the sickle member 8
The hook-shaped portion 9 at the tip projects forward from the front plate 2 and the front plate 31 and is provided with the metal fitting 20 provided on the door frame body 19.
Engage in (see, eg, FIG. 2). Then, the sickle member 8
Is moved a little further forward, so that the guide pin 1
1 moves upward or downward (upward in the illustrated example) along the curved portion 17 near the front of the long groove portion for guide 7, and the connecting pin 12 also moves to a position near the center of the long groove portion for guide 7. come. Therefore, in each sickle member 8 of the sliding door lock of the first and second inventions, the laterally elongated portion 10 pivots upward or downward (upward in the illustrated example) about the connecting pin 12 as a fulcrum, and the hook shape of the tip end. Since the long portion 9 also rotates upward or downward (upward in the illustrated example), the hook-shaped portion 9 is locked by the locking member 21 in the receiving metal fitting 20 and is in a locked state (for example, FIGS. 3 and 10). reference).

In the above case, neither of the sickle members 8 of the sliding door locks of the first and second inventions uses a link between the hub 5 and the sickle member 8 unlike the conventional sliding door locks, and the horizontally long The sickle member 8 itself is elongated rearward due to the shape portion 10,
In addition, the connecting pin 12 near the rear part can be rotated about a fulcrum. Therefore, even if the vertical movement width of the hook-shaped portion 9 at the tip of the sickle member 8 is rotated as described above, even if the rotation angle of the conventional one is the same, the length of the sickle member 8 is greatly expanded. is doing. As a result, even if there is an error in the mounting positions of the sliding door lock and the receiving metal fitting 20, the hook-shaped portion 9 at the tip of the sickle member 8 is locked to the locking member 21 of the receiving metal fitting 20 with a margin (see FIG. 3 above). , See FIG. 10).

Regarding the rotation of the sickle member 8 described above, in the sliding door lock of the second invention, the auxiliary plate 14 is connected to the rear portion of the laterally long portion 10 of the sickle member 8, but a conventional link is used. Unlike this, this is the case where the back set is large and the lock case 1 is long, so the sickle member 8 itself is the same as the sliding door lock of the first invention and is long. Therefore, when the sickle member 8 is rotated about the rear connecting pin 12 as a fulcrum, the vertical movement width of the hook-shaped portion 9 at the tip end is large, as in the sliding door lock of the first aspect of the invention. A reliable locked state can be obtained.

When the hook-shaped portion 9 at the tip of the sickle member 8 is formed longer than the conventional one in the above-mentioned hooked state, this also helps ensure that the hook 20 is hooked to the receiving metal fitting 20. The section spring 13 presses the locking outer peripheral portion of the hub 5 in this locked state to prevent inadvertent rotation of the hub 5 and maintain the locked state. If the hook-shaped portion 9 at the tip of the sickle member 8 is projected forward when the sliding door 16 is closed, the hook-shaped portion 9 collides with the front surface of the receiving fitting 20 of the door frame body 19. However, in the sliding door lock of the first or second invention, if the collision force applied to the hook-shaped upper portion 9 is larger than the spring force of the section spring 13 that presses the hub 5,
The guide pin 11 moves rearward along the curved portion 17 of the long guide groove 7, and the sickle member 8 immediately moves rearward along the straight portion. Therefore, since the hook-shaped portion 9 of the sickle member 8 immediately immerses into the lock case 1, the hook-shaped portion 9 and the receiving fitting 20 are not damaged.

The curved portion 1 near the front of the long groove portion 7 for the guide.
The rear inner surface 1 against which the guide pin 11 hits when the guide pin 11 tries to move in the unlocking direction from the locked state.
7a, if it is formed so as to bulge backward (see, for example, FIG. 4 and FIG. 11), the guide pin 11 at the tip position of the curved portion 17 moves more smoothly along the curved portion 17. It becomes easier to move backwards. In this sliding door lock, the guide pin 11 of the sickle member 8 is locked when the hook-shaped portion 9 of the sickle member 8 is locked by the locking member 21 in the receiving metal fitting 20.
Is at the tip of the long guide groove 7 of the lock case 1 (see FIG. 3).
-See Figure 10.). Therefore, when the sliding door is forcibly opened, the external force is received by the guide pin 11 of the sickle member 8 being hooked at the tip of the long guide groove 7 of the lock case 1, Unlike the above, it does not reach other parts. Moreover, unlike the conventional one, since the number of parts is small, there is room in space and cost, and the guide pin 11 having a large thickness and sufficient strength can be used. As a result, this sliding door lock has become stronger and stronger than conventional ones, so even if the sliding door is forcibly opened in the locked state, sufficient reliability as a lock is obtained. Have.

Next, when the sliding door 16 is opened by unlocking it, both the sliding door lock of the first invention and the sliding door lock of the second invention, the operating members such as knobs are locked as described above. It is sufficient to rotate the hub 5 in the lock case 1 in the reverse direction (counterclockwise in the illustrated example) via the angular shaft 18 by rotating the hub 5 in the opposite direction to the case. The hub 5 is now in engagement with the connecting pin 1
The sickle member 8 is pulled rearward (to the right in the illustrated example) via the second or second connecting pin 15. With this, the guide pin 11 near the center of the laterally long portion 10 of each sickle member 8 moves downward or upward (downward in the illustrated example) along the curved portion 17 near the front of the long guide groove portion 7, The sickle member 8 is downward or upward (downward in the illustrated example) with each connecting pin 12 as a fulcrum.
Turn to. Therefore, the hook-shaped portion 9 at the tip also rotates downward or upward (downward in the illustrated example), and the engagement with the engagement member 21 in the receiving member 20 is released, and the unlocked state is established. After that, the sickle member 8 subsequently retracts along the long guide groove 7, so that the hook-shaped portion 9 comes out of the receiving member 20 and is retracted into the lock case 1 (see, for example, FIGS. 1 and 9).

Even in this unlocked state, the section spring 1
3 presses the locking outer peripheral portion of the hub 5 in that state to prevent the hub 5 from rotating inadvertently and maintains the unlocked state. Good. As described above, the shape of the front end portion of the curved portion 17 on the front side of the long guide groove portion 7 contacts the rear inner surface 17a against which the guide pin 11 moves in the unlocking direction from the locked state.
If the guide pin 11 is formed in a bulge shape in the rearward direction, the guide pin 11 at the tip position of the curved portion 17 in the locked state can more easily move rearward along the curved portion 17. The lock is released more smoothly.

[0022]

1 to 8 relate to an embodiment of a sliding door lock according to the first aspect of the present invention, in which an operating member (not shown) such as a knob is rotated to rotate the lock via a square shaft 18. The hub 5 in the case 1 rotates, the sickle member 8 moves forward, and the hook-shaped portion 9 at the tip rotates here upward, so that the hook member 21 is hooked to the hooking member 21 in the receiving bracket 20 of the door frame body 19. Further, when the sickle member 8 retreats, the hook-shaped portion 9 pivots downward to release the hook, and the sickle member 8 can be retracted into the lock case 1 as it is.

The lock case 1 is formed of the front plate 2 and the laterally long side plate parts 3, but here it is formed by die casting, and one side plate part 3 is integrally formed at the rear part of the front plate 2. It becomes a horizontally long lock case body portion (see FIG. 4), and the other side plate portion 3 serves as a lid portion (see FIG. 5).
reference). The front plate 2 has a vertically elongated hole 33 in the central portion for allowing the front portion of the sickle member 8 to move in and out, and also has mounting holes in the upper and lower portions. A laterally long side plate portion 3 integrated with the front plate 2
Has a horizontally long shape with a length of about 25 mm and a width of about 60 mm, and the hub 5 described later is provided at an upper position near the rear part.
A hub round hole 4 for rotatably supporting the shaft portion 6 is formed.

Then, on the inner side surface of the side plate portion 2, here near the lower portion thereof, from the rear portion to the front, the guide pin 1 described later is provided.
1. A long groove portion 7 for guide having a front-rear length of about 50 mm is formed so that the connecting pin 12 and the like can be engaged and moved in the front-rear direction. The depth of the long groove portion 7 is about 2.5 mm here, and the groove width (height) is 0.5 m from the outer diameter of the pins 11 and 12.
It is increased by about m. A curved portion 17 is formed by curving the portion near the front portion of the long groove portion 7 for guide, here, about 35 mm from the rear end portion, upwardly curved.

Also on the other side plate portion 3 on the lid side, a hub round hole 4 is formed at an upper position near the rear portion so as to correspond to the above side plate portion 3, and from the rear portion near the lower portion of the inner side surface. The guide long groove portion 7 is formed toward the front, and the curved portion 17 is formed so as to be curved upward toward the front portion. In the curved portion 17 near the front of each of the long groove portions 7 for guide, the portion near the tip is not as wide as the outer diameter of the guide pin 11 here, and the guide pin 11 is unlocked from the locked position. The rear inner surface 17a, which is a portion close to the tip when hitting in the direction, is formed so as to bulge rearward (see, for example, FIGS. 1 and 2). As a result, the guide pin 11 that was at the tip position of the curved portion 17 when locked is easily moved rearward along the curved portion 17 smoothly.

The sickle member 8 is made by joining two stainless steel plates together by spot welding, and is composed of a hook-shaped portion 9 at the tip and a laterally elongated portion 10 (see FIG. 6). The sickle member 8 is bent upward at an angle of approximately 90 degrees with respect to the oblong portion 10, and the hook-shaped portion 9 is formed.
The laterally elongated portion 10 having a length of about 50 mm continues from the lower part of the tongue, and the guide pin 11 is inserted into the round hole 22 formed in the central portion of the horizontally elongated portion 10. The guide pin 11
Here, is a short cylinder made of stainless steel having an outer diameter of about 5 mm, and both side portions thereof are engaged with the long guide groove portions 7 and can be moved back and forth.

The horizontally long portion 10 of the sickle member 8 is made of a single stainless steel plate near the rear portion, and the hub 5 and the connecting pin 12 for connecting can be inserted into the circular hole 23 formed therein. Yes (see FIG. 6 above). The same connecting pin 12 as that used for the guide pin 11 is used here. The connecting pin 12 is engaged with and connected to the forked portion 24 of the hub 5, and both side portions of the pin 12 are also provided with the guide long groove portions. Engage 7
It is possible to move back and forth along it. The hub 5 is also die-cast here, and has a square hole 25 in the center thereof to which a square shaft 18 such as a knob of an operating member can be engaged, and both sides of the square hole 25 as a shaft portion 6.
Is rotatably supported by the hub round hole 4. Here, a forked portion 24 is formed downward on the hub 5 so as to be engageable with and connectable to the connecting pin 12, and an upper portion for locking which is pressed by a section spring 13 described later. The outer peripheral portion 26 is formed (see FIG. 7) so that the section can be provided when the sickle member 8 is in the most advanced state and the most retracted state (see FIGS. 1, 3, 9 and 10).

The section spring 13 used here is a horizontally long leaf spring, and both ends of the section spring 13 are locked by the locking pieces 27 on the upper side of the side plate 3 of the lock case 1 to form the hub as described above. The locking outer peripheral portion 26 of 5 can be pressed. Next, FIGS. 9 to 12 show an embodiment of the sliding door lock according to the second aspect of the present invention. The backset of the sliding door lock is enlarged depending on the type of operation member such as the sliding door 16 and the knob. It is used when necessary. And, here, the sliding door lock of the first invention and parts are made common as much as possible.

The lock case 1 is different from the sliding door lock of the first invention described above (see FIG. 11), but the side wall portions 3 are formed to have a length of about 20 mm in this case, and The only difference is that the circular hole 4 for the use is located rearward by that amount, and the long guide groove 7 on each inner surface is also formed rearward by that amount. In that case, since the sickle member 8 also needs to be long, a sickle member having a horizontally long portion may be used although not shown. However, in this case, the sickle member 8 itself is used as it is, and has a hook-shaped portion 9 at the tip thereof and a laterally elongated portion 10 behind it.
The guide pin 11 is inserted into the round hole 22 at the center of 0, and the round hole 23 for connection is formed at the rear part, and the single auxiliary plate 14 made of stainless steel is connected for expanding the back set. (See FIGS. 9 and 10).

The auxiliary plate 14 has a horizontally long shape of about 30 mm here, and has round holes 28 for pin insertion in the front and rear portions thereof (see FIG. 12). The connecting pin 1 is connected to the round hole 23 at the rear of the horizontally long portion 19 of the sickle member 8.
2 and insert the auxiliary plate 14 at the rear of the sickle member 8 as described above.
Are connected (see FIGS. 9 and 10 above). Here, the connecting pin 12 is also movable in the long groove portion 7 back and forth when the guide pin 11 is moving in the long groove portion 7 for guide, similarly to the sliding door lock of the first invention. Pin 11
Is a fulcrum when the sickle member 8 rotates when moving along the curved portion 17. The second connecting pin 1 is connected to the rear portion of the auxiliary plate 14 by engaging with the forked portion 24 of the hub 5.
5, the second connecting pin 15 is also movable in the longitudinal guide groove 7 in the front-rear direction. Both the connecting pin 12 and the second connecting pin 15 have the same parts as the guide pin 11.

Since the operating states of both the above-mentioned examples are as described in the above-mentioned embodiment of the invention, they are omitted here to avoid duplication. Further, in both of the above-described embodiments, the sickle member 8 is generally rotated upward, but the sliding door lock and the lock are required to rotate the sickle member 8 downward to be locked. The members may be provided upside down. In the figure, 2
9 is a screw hole for joining the both side plate portions 3 of the lock case 1, 30
Is a hole for inserting a connecting screw (not shown) for connecting the operation member inside and outside the sliding door 16, 31 is a plastic sound deadening sleeve, 32 is a front plate, and 33 is a vertically long hole for inserting and removing the sickle member. Indicates.

[0032]

As is clear from the above, the sliding door lock according to the present invention has a simple structure and a small number of parts, further reduces the cost, is compact, does not occupy a space for mounting, and is excellent in strength. In addition, the operation is always smooth and no trouble occurs, and even if there is an error in the mounting position of the sliding door lock and the receiving metal fitting, it can be locked properly and locked securely. Can be in a state.
That is, in the conventional tubular type sickle lock for sliding doors, it is essential to provide a connecting link between the hub and the sickle member, although the structure is simplified as described above, and the hub also requires a complicated shape. And that was pushing up material costs and manufacturing costs.

The operating state of the sickle member is such that when the sickle member moves forward, the oblique guide surface of the sickle member engages with the opening edge of the insertion hole and is pushed up, or the sickle member moves. The convex part on the rear end position engages with the stopper pin of the lock case,
Moreover, the convex portion at the rear portion of the lower end is engaged with the stopper of the lock case and pushed up. Therefore, there is a possibility that rattling may occur in the forward and backward movement of the sickle member, the movement is not always smooth, and the rotation when moving to the front position is not always smooth. .

Furthermore, since it is essential to provide a link at the rear end of the sickle member, the sickle member is shortened by the length of the link. Therefore, the sickle member has a short distance from the hook-shaped part at the tip to the fulcrum at the time of rotation, and the vertical movement width of the hook-shaped part at the time of rotation is short even if the rotation angle is the same. If there is a mounting error with the mounting position, the hook-shaped portion may not be properly hooked on the hooking member. Moreover, when the sliding door is forcibly opened in the locked state, the external force is transmitted from the sickle member to each part of the pin, the link and the sickle member, so there is a concern about strength and there is a slight problem in reliability. there were.

On the other hand, in the sliding door lock according to the present invention, a) In the sickle member of the sliding door lock of the first invention, the rear portion of the laterally elongated portion of the sickle member itself has a connecting pin. The hub may be connected to the hub via a hub, and the hub may have a relatively simple structure. Therefore, unlike the conventional one, the link is not required and the structure can be further simplified, and the hub can also have a simple shape, so that the material cost and the manufacturing cost can be reduced. b) Further, the sliding door lock of the second aspect of the invention is used when the back set at the time of mounting is large, and only an auxiliary plate for expanding the back set is provided at the rear part of the sickle member. Therefore, the operating member, the receiving metal fitting, the hub, the guide pin, the connecting pin, the section spring, and the like can be used in common with the sliding door lock of the first invention, and the number of parts can be reduced, The cost can be reduced to the same extent as the first one.

C) Further, in the sliding door lock of the first invention, a guide pin near the center of the laterally elongated portion of the sickle member and a connecting pin near the rear portion are added to the sliding door lock of the second invention. The second connecting pins on the rear portion of the auxiliary plate are engaged with the guide long groove portions on both inner surfaces of the lock case, respectively, and move back and forth along the guide long groove portions. Therefore, the sickle member can always move forward and backward reliably and smoothly. d) Moreover, when the hub is rotated, the guide pin of the sickle member advances along the guide long groove portion, and moves to the curved portion continuing to the front portion of the long groove portion as it is, thereby forming a hook shape at the tip. The part rotates upward or downward and is hooked in the receiving metal fitting. Therefore, the hook-shaped portion at the tip of the sickle member can be rotated upward or downward smoothly and accurately without any obstacle, and no operational trouble occurs.

E) The vertical movement width in which the hook-shaped portion at the tip moves by the rotation of the sickle member is the same as that of the sickle member itself of the sliding door lock of the first and second inventions without using the link. The laterally elongated portion is long, and the connecting pin at the rear portion serves as a fulcrum for rotation. Therefore, even if the rotation angle of the sickle member is the same as the conventional one, the vertical movement width of the hook-shaped portion at the tip can be increased by the length of the horizontally long portion of the sickle member. As a result, even if there is an error in the mounting position between the sliding door lock and the receiving metal fitting, the hook-shaped portion can reach the position of the latching member within the receiving metal fitting with a margin to obtain a reliable locked state. be able to.

F) Regarding the rotation of the sickle member described above, in the sliding door lock of the second invention, the auxiliary plate is connected to the rear portion of the horizontally long portion of the sickle member, but unlike the conventional link. This is the case where the back set is large and the lock case is long, so the sickle member itself is as long as the first one. Therefore, when the sickle member is rotated about the rear connecting pin as a fulcrum, the vertical movement width of the hook-shaped portion at the tip is increased as in the sliding door lock according to the first aspect of the present invention. A locked state can be obtained.

G) In the sliding door lock of the first and second inventions, when the sliding door is forcibly opened in the locked state, the external force is that the guide pin of the sickle member guides the lock case. It is received by being hooked at the tip of the long groove portion 7, and unlike the conventional one, it is not transmitted to other parts. Moreover, since the number of parts is small unlike the conventional one, the guide pin can be thick and have sufficient strength. As a result, this lock for sliding doors has sufficient strength and is made tougher than conventional ones, so even if the sliding door is forcibly opened in the locked state, sufficient reliability as a lock is obtained. You can have it.

H) Even when the sliding door is closed with the hook-shaped portion at the tip of the sickle member protruding, even if the sliding door collides with the receiving metal fitting on the door frame side, the pressing force of the sickle member causes the guide pin to move toward the front. A reliable and smooth transition from the curved portion to the guide long groove portion can be achieved. Therefore, the sickle member overcomes the section spring that presses the hub and retracts, and the hook-shaped portion and the receiving metal fitting at the tip do not receive an excessive impact force, and damage can be prevented. i) In addition, the shape of the front end portion of the curved portion near the front of the long guide groove is formed in a rearward bulge shape on the inner rear surface against which the guide pin abuts when moving from the locked state to the unlocking direction. However, since the guide pin located at the tip of the curved portion in the locked state is more likely to move rearward along the curved portion more smoothly, the unlocking operation can be performed more smoothly. it can.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an unlocked state in a first embodiment of a sliding door lock according to the present invention.

FIG. 2 is a vertical cross-sectional side view showing the sliding lock shown in FIG. 1 in the middle of locking.

FIG. 3 is a vertical cross-sectional side view showing a locked state of the pull lock shown in FIG.

FIG. 4 is a perspective view showing one side plate portion of the lock case of the pull-hold lock shown in FIG. 1.

5 is a perspective view showing the other side plate portion of the lock case of the pull lock shown in FIG. 1. FIG.

FIG. 6 is a perspective view showing a sickle member used in examples of the first and second sliding door locks according to the present invention.

FIG. 7 is a perspective view showing a hub used in an embodiment of first and second sliding door locks according to the present invention.

FIG. 8 is a perspective view showing a guide pin used in an embodiment of the first and second sliding door locks according to the present invention.

FIG. 9 is a vertical sectional side view showing an unlocked state of the second embodiment of the sliding door lock according to the present invention.

FIG. 10 is a vertical sectional side view showing a locked state of the sliding door lock shown in FIG. 9.

11 is a side view showing one side plate portion of the lock case of the sliding door lock shown in FIG. 9. FIG.

12 is a perspective view showing an auxiliary plate used in the sliding door lock shown in FIG.

[Explanation of symbols]

1 lock case 2 front plate 3 Side plate Round hole for 4 hubs 5 hubs 6 shafts 7 Long groove for guide 8 scythe members 9 Hook shape part 10 Horizontally elongated part 11 Guide pin 12 connecting pins 13 section springs 14 Auxiliary plate 15 Second connecting pin 16 sliding doors 17 Curved part 17a rear inner surface 18 square axes 19 door frame 20 bracket 21 Hook member 22 round hole 23 round hole 24 Bifurcated part 25 square hole 26 Locking Outer Part 27 Locking piece 28 round holes 29 screw holes 30 holes 31 sound deadening sleeve 32 front plate 33 Vertical hole

Claims (3)

[Claims] 1. Long groove portions for guides 7 are formed on the inner side surfaces of both side plate portions 3 of the lock case 1 facing each other from the rear portion toward the front, and the guide long groove portions 7 are formed on the front side of each of the long groove portions 7 or above. A curved portion 17 is formed downward, and a sickle member 8 having a hook-shaped portion 9 at its tip is provided with a horizontally elongated portion 1 rearward.
0 is formed, a guide pin 11 is provided near the center of the laterally elongated portion 10 and a connecting pin 12 is provided near the rear end.
The pins 11 and 12 are engaged with the guide long groove portion 7, the connecting pin 12 is connected to the hub 5, and the rotation of the hub 5 can be locked at a specific position. A lock for a sliding door provided with a section spring 13 for pressing 26. 2. Guide long grooves 7 are formed on the inner side surfaces of both side plate portions 3 of the lock case 1 facing each other from the rear side toward the front, and the guide long groove portions 7 are formed on the upper side or the front side of each of the long groove portions 7. A curved portion 17 is formed downward, and a sickle member 8 having a hook-shaped portion 9 at its tip is provided with a horizontally elongated portion 1 rearward.
0 is formed, a guide pin 11 is horizontally provided near the center of the laterally elongated portion 10, and a connecting pin 12 is provided at the rear portion to pivotally support an auxiliary plate 14 for backset extension,
A second connecting pin 15 is laterally provided near the rear part of the auxiliary plate 14 to connect with the hub 5, and the pins 11, 12 and 15 are respectively engaged with the guide long groove portions 7, and the hub 5 A lock for a sliding door provided with a section spring 13 that presses the locking outer peripheral portion 26 so that the rotation of the lock can be locked at a specific position. 3. A curved portion 17 in front of the long guide groove portion 7.
3. The sliding door lock according to claim 1 or 2, wherein a portion near the tip end is formed so as to bulge rearward on the rear inner surface 22 against which the guide pin abuts when moving from the locked state to the unlocking direction.