Catch lock

Abstract

To provide a catch lock capable of maintaining an unlocked state.SOLUTION: A catch lock includes: a locking member 16 which is provided displaceably with respect to a keeper 3 between a locked state and an unlocked state; a locking cam member 18 which is provided with respect to the locking member 16 between an engaged state and a non-engaged state, and prevents displacement of the locking member 16 in an unlocking direction in the engaged state, thereby maintaining the locking member 16 in the locked state; and an unlocking retaining member 17 which is provided displaceably with respect to the locking cam member 18 between an engaged state and a non-engaged state, and prevents displacement of the locking cam member 18 in an engaging direction relative to the locking member 16 in the engaged state, thereby maintaining the locking member 16 in the unlocked state.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a catch lock used, for example, for a door lock or the like.

Background Art

[0002] Conventionally, various types of such catch locks have been proposed.

[0003] For example, Patent Document 1 discloses a snatch lock in which when the door is closed, locking of the door to the fixed frame is automatically established, unlocking of the door is performed by operating a trigger lever, and the door is automatically elastically driven in the opening direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in this snatch lock, when the door is heavy and does not elastically drive during unlocking, that is, when the receiver on the fixed frame side does not separate from the lock plate on the door side, it will be relocked immediately after the finger is released from the trigger lever. Therefore, it is necessary to open the door while operating the trigger lever with a finger.

[0006] Moreover, for a huge door, there is a desire to use two of these snatch locks with a space in between. However, it is not easy to open the door while operating the two trigger levers provided with a space between them by one person.

[0007] The present invention has been made based on the above circumstances, and an object thereof is to provide a catch lock capable of maintaining an unlocked state.

Means for Solving the Problem

[0008] In order to solve the above problems, the catch lock according to the present invention includes a main body attached to a first member and a receiver attached to a second member provided so as to be relatively separable from the first member. The main body is provided with a lock member displaceable between a locked state and an unlocked state with respect to the receiver, a first spring that biases the lock member in the unlocking direction with respect to the receiver, and a locking cam member provided so as to be displaceable between a locked state and an unlocked state with respect to the lock member, and that prevents displacement of the lock member in the unlocking direction against the biasing force of the first spring in the locked state and holds the lock member in the locked state, a second spring that biases the locking cam member in the locking direction with respect to the lock member, and an unlocking holding member provided so as to be displaceable between a locked state and an unlocked state with respect to the locking cam member, and that prevents displacement of the locking cam member in the locking direction with respect to the lock member in the locked state and holds the lock member in the unlocked state, and that is brought into an unlocked state with respect to the locking cam member when the receiving portion separates from the main body as the first member and the second member separate from each other, and an interlocking means that interlocks with the displacement of the locking cam member to the unlocked state with respect to the lock member and displaces the unlocking holding member to the locked state with respect to the locking cam member.

Advantages of the Invention

[0009] According to the catch lock of the present invention, the unlocked state can be maintained.

Brief Description of the Drawings

[0010] The drawings show specific embodiments of the present invention according to the present disclosure, including not only essential configurations of the invention but also optional and preferred embodiments.

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Best Mode for Carrying Out the Invention

[0011] <First Embodiment> Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0012] In FIG. 1, reference numeral 1 indicates a catch lock according to the first embodiment of the present invention.

[0013] This catch lock 1 includes a main body 2 and a keeper (receiver) 3.

[0014] The main body 2 is attached to a movable part (first member) 4 such as a door, and the keeper 3 is attached to a fixed part (second member) 5 such as a fixed frame, and the movable part 4 is configured to approach and separate from the fixed part 5.

[0015] Also, as shown in FIGS. 2 and 3, the main body 2 is attached to the movable part 4 by a movable-side attachment portion 6, and the keeper 3 is attached to the fixed part 5 by a fixed-side attachment portion 7.

[0016] The main body 2 includes a first case 8 and a second case 9 that are disposed opposite to each other with a predetermined distance therebetween, and the movable-side attachment portion 6 is formed on these first case 8 and second case 9.

[0017] That is, the movable-side attachment portion 6 has a first attachment portion 11 and a second attachment portion 12. The first attachment portion 11 is formed by bending a part of the first case 8, and the second attachment portion 12 is formed by bending a part of the second case 9.

[0018] A first shaft 13, a second shaft 14, and a third shaft 15 are installed on the first case 8 and the second case 9.

[0019] A lock member 16 and an unlocking holding member 17 are pivotally supported on the first shaft 13 so as to be rotatable, a locking cam member 18 is pivotally supported on the second shaft 14 so as to be rotatable, and an unlocking lever (unlocking means) 19 is pivotally supported on the third shaft 15 so as to be rotatable.

[0020] Further, a first torsion coil spring (first spring) 21 is attached to the first shaft 13 so as to bias the lock member 16.

[0021] Furthermore, a tension coil spring (second spring, third spring) 22 is stretched between the locking cam member 18 and the unlocking lever 19 so as to bias the locking cam member 18 and the unlocking lever 19.

[0022] That is, these lock member 16, unlocking holding member 17, locking cam member 18, unlocking lever 19, first torsion coil spring 21, and tension coil spring 22 are disposed between the first case 8 and the second case 9.

[0023] A first entry groove 23 and a second entry groove 24 for the keeper 3 to enter are respectively formed in the first case 8 and the second case 9.

[0024] Further, the lock member 16 is formed with a lock member entry groove 25 through which the keeper 3 can enter together with the first entry groove 23 and the second entry groove 24, and a pair of lock member engagement portions 26 that are provided on both sides of the lock member entry groove 25 and engage with the keeper 3 when the keeper 3 enters and exits.

[0025] And this lock member 16 is provided so as to be rotationally displaceable between a locked state and an unlocked state with respect to the keeper 3 that has entered the first entry groove 23, the second entry groove 24, and the lock member entry groove 25.

[0026] The lock member 16 is biased in the unlocking direction with respect to the keeper 3 by the first torsion coil spring 21.

[0027] A lock member locking recess 31 is formed in this lock member 16.

[0028] A cam member locking projection 32 provided on the locking cam member 18 can be locked in the lock member locking recess 31.

[0029] That is, the cam member locking convex portion 32 of the locking cam member 18 is provided so as to be rotatably displaceable between a locked state and an unlocked state with respect to the lock member locking concave portion 31 of the lock member 16, and in the locked state, it resists the biasing force of the first torsion coil spring 21 and prevents the lock member 16 from rotating and displacing in the unlocking direction, thereby holding the lock member 16 in the locked state.

[0030] This locking cam member 18 is biased in the locking direction with respect to the lock member 16 by a tension coil spring 22.

[0031] Also, the cam member locking convex portion 32 of the locking cam member 18 can be locked to the holding member locking concave portion 33 provided on the unlocking holding member 17.

[0032] That is, the holding member locking concave portion 33 of the unlocking holding member 17 is provided so as to be rotatably displaceable between a locked state and an unlocked state with respect to the cam member locking convex portion 32 of the locking cam member 18, and in the locked state, it prevents the locking cam member 18 from rotating and displacing in the locking direction with respect to the lock member 16, thereby holding the lock member 16 in the unlocked state.

[0033] Further, on the locking cam member 18, an interlocking action portion (interlocking means) 34 is formed which, when the cam member locking convex portion 32 of the locking cam member 18 rotates and displaces to an unlocked state with respect to the lock member 16, interlocks to displace the unlocking holding member 17 to a locked state with respect to the locking cam member 18.

[0034] That is, the interlocking action portion 34 is configured to displace the holding member locking concave portion 33 of the unlocking holding member 17 in the locking direction with respect to the cam member locking convex portion 32 of the locking cam member 18 in conjunction with the rotation and displacement of the cam member locking convex portion 32 of the locking cam member 18 to an unlocked state with respect to the lock member locking concave portion 33 of the lock member 16.

[0035] Further, the unlocking holding member 17 includes a holding member engaging portion 35 that engages when the keeper 3 exits from the first entry groove 23 and the second entry groove 24, and an unlocking cancel button 36 for rotationally displacing the locking cam member 18 to a non-locked state by manual operation.

[0036] Further, a cam member locking recess 37 is formed in the locking cam member 18.

[0037] A lever locking edge 38 provided on the unlocking lever 19 can be locked in this cam member locking recess 37.

[0038] That is, the unlocking lever 19 is configured such that the lever locking edge 38 acts on the locking cam member 18 to rotationally displace the locking cam member 18 in the unlocking direction with respect to the locking member 16.

[0039] Further, this unlocking lever 19 is biased by a tension coil spring 22 in a direction in which the unlocking lever 19 does not act on the locking cam member 18.

[0040] In the above configuration, as shown in FIGS. 4 and 5, when the movable part 4 approaches the fixed part 5, the keeper 3 enters the first entry groove 23, the second entry groove 24, and the locking member entry groove 25, and in the locked state where the locking member 16 locks the keeper 3 so that it cannot exit, the locking member engaging portion 26 closes the first entry groove 23 and the second entry groove 24, and the movable part 4 cannot separate from the fixed part 5.

[0041] At this time, the cam member locking projection 32 of the locking cam member 18 locks in the locking member locking recess 31, preventing the rotational displacement of the locking cam member 18 in the unlocking direction.

[0042] Also, at this time, the cam member locking projection 32 is in a non-locked state with respect to the holding member locking recess 33.

[0043] From this state, as shown in FIGS. 6 and 7, when the unlocking lever 19 is operated, the lever locking edge 38 of the unlocking lever 19 acts on the locking cam member 18, and the locking cam member 18 rotates and displaces.

[0044] As a result, the cam member locking projection 32 rotates and displaces in the unlocking direction with respect to the lock member locking recess 31, and the interlocking action portion 34 of the locking cam member 18 contacts the unlocking holding member 17.

[0045] As shown in FIGS. 8 and 9, when the unlocking lever 19 is further operated, the unlocking holding member 17 rotates and displaces.

[0046] As shown in FIGS. 10 and 11, when the finger is released from the unlocking lever 19, the unlocking lever 19 rotates and displaces to the original state by the biasing force of the tension coil spring 22.

[0047] As a result, the locking cam member 18 rotates and displaces by the biasing force of the tension coil spring 22, and the cam member locking projection 32 locks into the holding member locking recess 33.

[0048] At this time, the cam member locking projection 32 becomes unlocked with respect to the lock member locking recess 31, and this unlocked state is maintained.

[0049] Therefore, the lock member 16 becomes rotatable and displaceable, that is, the keeper 3 can be removed from the lock member entry groove 25, and this state is maintained.

[0050] As shown in FIGS. 12 and 13, when trying to pull out the keeper 3 from the first entry groove 23 of the first case 8 and the second entry groove 24 of the second case 9 by separating the movable portion 4 from the fixed portion 5, the keeper 3 contacts the holding member engaging portion 35 of the unlocking holding member 17.

[0051] As shown in FIGS. 14 and 15, along with the operation of pulling out the keeper 3, the unlocking holding member 17 returns to the original position, and the holding member locking recess 33 and the cam member locking projection 32 become unlocked.

[0052] As shown in FIGS. 16 and 17, when the keeper 3 is pulled out, the unlocking state is achieved.

[0053] As shown in FIGS. 18 and 19, when the keeper 3 is inserted again, the keeper 3 comes into contact with the locking member engaging portion 26 of the locking member 16.

[0054] When the keeper 3 is inserted further in, as shown in FIGS. 4 and 5, the locking member 16 rotates and displaces, and the cam member locking convex portion 32 locks into the locking member locking concave portion 31, achieving the locking state.

[0055] According to the above configuration, since the unlocking state can be maintained, the movable part 4 can be separated from the fixed part 5 even when the finger is released from the unlocking lever 19.

[0056] <Second Embodiment> Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

[0057] In the above-described first embodiment, the unlocking cam member 18 was provided with an interlocking action portion (interlocking means) 34. However, in this second embodiment, as shown in FIGS. 20 and 21, a second torsion coil spring (fourth spring) 41 that biases the unlocking holding member 17 in the engaging direction with respect to the locking cam member 18 is attached to the first shaft 13.

[0058] Even with this configuration, the same effects as those of the first embodiment can be achieved.

[0059] <Third Embodiment> Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

[0060] In the above-described first embodiment, the unlocking lever (unlocking means) 19 was provided. However, in this third embodiment, as shown in FIGS. 22 and 23, the locking cam member 18 is provided with an unlocking operation portion (unlocking means) 42, and the locking cam member 18 can be displaced in the non-locking direction with respect to the locking member 16.

[0061] By configuring in this way, not only can the same effects as those of the first embodiment be achieved, but also the number of components can be reduced.

[0062] In the above first to third embodiments, the first member is the movable part and the second member is the fixed part. However, in the present invention, the first member may be the fixed part and the second member may be the movable part, or both the first member and the second member may be movable parts. In short, it goes without saying that the first member and the second member only need to be configured to be relatively separable and attachable.

[0063] The disclosure regarding the present invention described above can be summarized at least in the following matters.

[0064] That is, the catch lock according to the present invention includes a main body attached to the first member and a receiver attached to the second member provided so as to be relatively separable and attachable with respect to the first member. The main body is provided with a lock member displaceable between a locked state and an unlocked state with respect to the receiver, a first spring that biases the lock member in the unlocking direction with respect to the receiver, and is provided so as to be displaceable between a locked state and a non-locked state with respect to the lock member, and in the locked state, resists the biasing force of the first spring to prevent the displacement of the lock member in the unlocking direction and holds the lock member in the locked state. It has a locking cam member, a second spring that biases the locking cam member in the locking direction with respect to the lock member, and is provided so as to be displaceable between a locked state and a non-locked state with respect to the locking cam member. In the locked state, it prevents the displacement of the locking cam member in the locking direction with respect to the lock member and holds the lock member in the unlocked state. At the same time, as the receiving part separates from the main body as the first member and the second member separate, the locking cam member is set in a non-locked state, and an unlocking holding member, and an interlocking means that interlocks to displace the unlocking holding member to a locked state with respect to the locking cam member when the locking cam member is displaced to a non-locked state with respect to the lock member. It is characterized by comprising.

[0065] The above invention can include at least the following embodiments. These embodiments can be adopted separately or in combination with each other.

[0066] (1) The interlocking means may be configured to include an interlocking action portion provided on the locking cam member, which displaces the unlocking holding member in the locking direction with respect to the locking cam member as the locking cam member is displaced to a non-locked state with respect to the locking member.

[0067] (2) The unlocking holding member may be configured to include an unlocking cancel button for displacing it to a non-locked state with respect to the locking cam member.

[0068] (3) The main body may be configured to include an unlocking means for operating the locking cam member to release the locked state with the locking member and unlock it.

[0069] (4) The unlocking means may be configured to include an unlocking lever for acting on the locking cam member to displace the locking cam member in the non-locking direction with respect to the locking member.

[0070] (5) The unlocking means may be configured to include a third spring for biasing the unlocking lever in a direction where it does not act on the locking cam member.

[0071] (6) The unlocking means may be configured to include an unlocking operation portion provided on the locking cam member, which acts on the locking cam member to displace the locking cam member in the non-locking direction with respect to the locking member.

[0072] (7) The interlocking means may be configured to include a fourth spring for biasing the unlocking holding member in the locking direction with respect to the locking cam member.

Explanation of Reference Numerals

[0073] 1 Catch lock 2 Main body 3 Receiver (keeper) 4 First member (movable part) 5 Second member (fixed part) 16 Locking member 17 Unlocking holding member 18 Locking cam member 19 Unlocking means (unlocking lever) 21 First spring (first torsion coil spring) 22 Second spring, third spring (tension coil spring) 34 Interlocking means (interlocking action part) 36 Unlock cancel button 41 Fourth spring (second torsion coil spring) 42 Unlocking means (unlocking operation part)

Claims

1. A main body attached to a first member, a receiver attached to a second member provided so as to be able to approach and separate relative to the first member, and comprising: The main body is provided with: a lock member displaceable between a locked state and an unlocked state with respect to the receiver, a first spring that biases the lock member in the unlocking direction with respect to the receiver, a locking cam member provided so as to be displaceable between a locked state and an unlocked state with respect to the lock member, and in the locked state, preventing displacement of the lock member in the unlocking direction against the biasing force of the first spring and holding the lock member in the locked state, a second spring that biases the locking cam member in the locking direction with respect to the lock member, an unlocking holding member provided so as to be displaceable between a locked state and an unlocked state with respect to the locking cam member, and in the locked state, preventing displacement of the locking cam member in the locking direction with respect to the lock member and holding the lock member in the unlocked state, and when the receiver separates from the main body as the first member and the second member separate, the unlocking holding member is brought into an unlocked state with respect to the locking cam member, and an interlocking means that, when the locking cam member is displaced to an unlocked state with respect to the lock member, interlocks to displace the unlocking holding member to a locked state with respect to the locking cam member. A catch lock characterized by comprising the above.

2. The interlocking means is provided on the locking cam member and includes an interlocking action portion that displaces the unlocking holding member in the locking direction with respect to the locking cam member as the locking cam member is displaced to an unlocked state with respect to the lock member. The catch lock according to Claim 1, characterized by this.

3. The unlocking holding member includes an unlocking cancel button for displacing the locking cam member to an unlocked state. The catch lock according to Claim 1, characterized by this.

4. The main body includes an unlocking means for operating the locking cam member to release the locked state with the lock member and unlock. The catch lock according to Claim 1, characterized by this.

5. The unlocking means includes an unlocking lever for acting on the locking cam member to displace the locking cam member in the unlocking direction with respect to the lock member. The catch lock according to Claim 4, characterized by this.

6. The unlocking means includes a third spring that biases the unlocking lever in a direction where it does not act on the locking cam member. The catch lock according to Claim 5, characterized by this.

7. The unlocking means is provided on the locking cam member, and is characterized by comprising an unlocking operation portion that acts on the locking cam member to displace the locking cam member in a non-locking direction with respect to the locking member. The catch lock according to claim 4.

8. The interlocking means is characterized by comprising a fourth spring that biases the unlocking holding member in a locking direction with respect to the locking cam member. The catch lock according to claim 1.

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