JP3976838B2 - lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lock in which a latch protrudes and retracts from the inside of a lock body by rotating a square core with handles attached to both ends, and more specifically, a structure for locking so that the square core does not rotate. It relates to a lock that has been made sturdy.
[0002]
[Prior art]
In the lock, a lock body is disposed between flat plate-like fixing members joined to the front and back surfaces of the door so that the latch protrudes and retracts from the lock body. The latch protrudes and retracts when the square core passing through the lock body rotates. Handles such as a grip ball and a lever handle are attached to both ends of the square core. When the handle is turned and the latch is retracted into the lock body, the door can be opened. Even if the handle is turned, if the latch is not retracted into the lock body and the protruding state is maintained, the door cannot be opened and is locked. In order to maintain the state in which the latch protrudes from the lock body, there is a lock that prevents the square core from rotating in the locked state.
[0003]
As shown in FIGS. 5 and 6, the lock has two plate-like fixing members 101 and 102 that are integrated by a connecting shaft 107 with the front and back surfaces of the door 100 sandwiched therebetween. A lock body (not shown) containing a latch and a latch turning mechanism (both not shown) is disposed between the fixing members 101 and 102, and a square core 103 passes through the lock body. Has a typical structure. Handles 104 are attached to both ends of the square core 103. By turning the handle 104, the latch retracts into the lock body and can be opened. For locking, a pair of guide walls 101a protrudes on the surface where the indoor side fixing member 101 is joined to the door 100 so that the latch can be kept protruding from the lock body. The fixed plate 110, the contact member 120, and the like are accommodated on the upper side and the lower side.
[0004]
As shown in FIG. 5, the fixed platen 110 has a hat shape in which a square hole 111 through which the square core 103 passes is formed. The fixed platen 110 can be rotated about the rotation axis, and as shown in FIG. A rectangular notch 112 is formed in a part of the collar so as not to rotate. The abutting member 120 is lifted and lowered between the pair of guide walls 101a, and has a protruding portion 121 projecting into the notch 112 of the stationary platen 110 at the upper end. The abutting member 120 moves up and down by rotating a rotating plate 130 that is coaxially connected to and interlocked with a knob 105 disposed below the fixed member 101 on the indoor side. The contact member 120 and the turntable 130 are engaged by a helical spring 131, and the helical spring 131 can maintain the position where the contact member 120 is lowered and the raised position.
[0005]
At the position where the contact member 120 is lowered, the convex portion 121 of the contact member 120 is disengaged from the cutout portion 112 of the stationary platen 110 and is unlocked. Therefore, when the handle 104 is rotated, the square core 103 can be rotated together with the fixed platen 110, and the latch is retracted from the lock body, so that the door can be opened. When the knob 105 is turned and the protrusion 121 of the contact member 120 is engaged with the notch 112 of the stationary platen 110 as shown in FIG. That is, even if the handle 104 is to be rotated, the stationary platen 110 through which the square core 103 passes cannot be rotated because the convex portion 121 of the contact member 120 is engaged with the notch portion 112. Also, the square core 103 cannot be rotated. Therefore, the latch cannot be retracted into the lock body, and is locked.
[0006]
[Problems to be solved by the invention]
In the locked state, the outer handle 104 may be turned vigorously. Then, the square core 103 to which the handle 104 is attached applies a rotational force to the fixed platen 110. The rotational force of the fixed platen 110 applies a pressing force to the convex portion 121 of the contact member 120, and the pressing force applies a reaction force to the notch 112 of the fixed platen 110 as a reaction.
[0007]
However, since the fixed platen 110 is formed into a hat shape, its rigidity is weak so that it can be easily processed, and the handle 104 is rotated in a locked state so that a pressing force and a reaction force are applied to the notch 112. When force is applied, the notch 112 is deformed. When the notch 112 is deformed, a gap is formed between the notch 112 and the convex part 121 of the contact member 120, which causes rattling and poor operability. In the worst case, there is a problem that the notch 112 is completely crushed and cannot be locked.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lock with a sturdy structure for locking so that the square core does not rotate.
[0009]
[Means for Solving the Problems]
The lock for solving the above-mentioned problem is a lock body including a lock body incorporating a latch and a rotation mechanism of the latch, a square core connecting the handle and the lock body, and a rotation prevention member of the square core. The rotation prevention member has two or more guide walls extending in a parallel direction, and a contact member that slides along the guide walls and engages with or disengages from two or more surfaces of the square core. is there.
[0010]
According to the lock described above, when the contact member of the rotation prevention member is pulled out of the square core, the square core can be rotated and unlocked, and the rotation prevention member of the rotation member. When the contact member is engaged with the square core, the square core cannot be rotated and is locked.
[0011]
Another lock for solving the above problems includes a lock body including a latch and a rotation mechanism of the latch, a square core connecting the handle and the lock body, and a lock provided with a rotation prevention member of the square core. Yes in, rotation preventing member, and two or more guide walls extending in a direction parallel, with slides along the guide wall, the abutment member for preventing the angular core disengageably to rotation of the angular core The abutting member is formed by combining two or more abutting pieces, and has an engaging portion with which the square core can be engaged, and rotational force is applied from the square core engaged with the engaging portion. Then, the contact piece is separated in the direction perpendicular to the guide wall, the engaging portion expands, and each of the contact pieces is pressed against the guide wall.
[0012]
According to the lock described above, the contact member includes two or more contact pieces having different contact surfaces of the square core. When the square core is rotated in the locked state, the contact piece presses the guide wall by the rotational force received when engaged with the square core. That is, the rotational force of the square core is loaded by the guide wall through the contact piece. Here, since the guide wall can be easily designed with high rigidity, it can withstand the rotational force of the square core. Note that the abutting member has a thick portion, and an engaging portion may be provided in the thick portion.
[0013]
The lock, developed from the above two locks to solve the above problems, has a fixing member that is fixed to the front and back surfaces of the door and that is integrated with a connecting shaft. The blocking member is incorporated in at least one of the fixed members, and the position of the connecting shaft is a position adjacent to the contact portion between the contact member and the guide wall when the contact member is engaged with the square core. It is characterized by.
[0014]
According to the lock described above, the connecting shaft is located adjacent to the contact portion between the contact member and the guide wall when the contact member sliding along the guide wall is engaged with the square core. For this reason, even if the contact member engaged with the square core receives a rotational force from the square core, the rotational force acts on the connecting shaft. Since the connecting shaft integrates the fixing members on the front and back surfaces, the connecting shaft is relatively strong, can receive the rotational force from the square core, and can prevent the guide wall from being damaged.
[0015]
In the lock that has developed the above three locks for solving the above-described problems, the contact member slides along the guide wall and is moved by the slide member engaged with the contact member. It is a feature.
[0016]
According to the lock described above, the abutting member engages with the sliding member that slides along the guide wall, so that the abutting member and the sliding member are in a divided state, and the square core changes from the square core to the abutting member. The applied rotational force is not transmitted to the sliding member.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of an unlocked state according to the present invention. FIG. 2 is a front view of the locked state of the lock according to the present invention. FIG. 3 is a perspective view of an essential part of the lock according to the present invention. FIG. 4 is a front view of a cover constituting the lock according to the present invention. Here, the vertical positional relationship in the drawing will be described as the actual vertical positional relationship.
[0018]
In the lock according to the present invention, the rotation preventing member A of the square core 1 is disposed on the surface where the fixing member 10 to be joined to the door (not shown) is joined to the door, and the rotation preventing member A has two guides. The walls 11 and 12 are formed in parallel, and the contact member 20 is slidably disposed between the guide walls 11 and 12. However, when the contact member 20 is in close contact with the guide walls 11 and 12, the contact member 20 becomes difficult to slide between the guide walls 11 and 12, and the operability is lowered. Therefore, a slight gap is formed between the contact member 20 and the guide walls 11 and 12 so that the contact member 20 can smoothly slide between the guide walls 11 and 12.
[0019]
The abutting member 20 combines two convex-shaped abutting pieces 21 and 22 into an H-shape, and the upward U-shaped portion is an engaging portion 23 for detaching the square core 1. As shown in FIG. 3, the engaging portion 23 is a thick-walled portion 24 so that the square core 1 can be engaged with two or more surfaces over a wide area. Further, a ridge 21a is formed on the bulging portion of one abutting piece 21, and a ridge 22a is formed on the bulging portion of the other abutting piece 22, and the ridge 21a and the ridge 22a are engaged. Match. The contact pieces 21, 22 move integrally in the direction along the guide walls 11, 12 and can be separated in the direction perpendicular to the guide walls 11, 12. Therefore, the contact pieces 21 and 22 slide integrally between the guide walls 11 and 12. On the other hand, the contact pieces 21 and 22 can extend in the vertical direction with respect to the guide walls 11 and 12. Specifically, the contact pieces 21 and 22 swing around the engaging portion as a rotation axis.
By doing so, when a rotational force is applied to the engaging portion 23 from the square core 1 engaged with the engaging portion 23, the engaging portion 23 is urged in the diameter increasing direction.
[0020]
The contact member 20 is connected to the sliding member 30 and moves up and down. Convex portions 21b and 31 and concave portions 21c and 32 are formed at the lower end portion of one abutting piece 21 of the abutting member 20 and the upper end portion of the sliding member 30, respectively. The recesses 21c and 32 are engaged and connected so as to allow some play. Thus, by making the sliding member 30 and the contact member 20 separate, a rotational force is applied from the square core 1 to the engaging portion 23 of the contact member 20, and the contact piece 21 of the contact member 20. , 22 can be prevented from momentarily disappearing at the connecting portion, and the connecting portion between one abutting piece 21 and the sliding member 30 being broken. Further, since the moment disappears at the connecting portion and no moment is applied to the sliding member 30, the pressure contact between the sliding member 30 and the guide wall 11 is prevented, and the operation of the sliding member 30 becomes smooth.
[0021]
The sliding member 30 also slides on one guide wall 11 and moves up and down. The guide wall 11 is formed up to the side of the rotation shaft 40 disposed at the center of the fixing member 10. The rotating shaft 40 is rotated by a knob (not shown). A sector gear 42 is formed on the shaft portion 41, and a rack 33 that meshes with the sector gear 42 is formed on the sliding member 30. Therefore, when the rotating shaft 40 rotates, the sliding member 30 moves up and down along the guide walls 11 and 12.
[0022]
Further, in order to prevent the rotating shaft 40 from rotating too much, a disk 44 having a notch 43 formed on the rotating shaft 40 is formed closer to the fixed member 10 than the sector gear 42. The notch 43 comes in contact with the stopper 13 protruding from the fixing member 10 so that the rotating shaft 40 can be rotated only between the notches 43. A triangular prism-shaped locking portion 45 is formed on a portion of the rotating shaft 40 where the sector gear 42 is not formed. The locking portion 45 is locked to the linear spring 61 locked to the protrusions 14, 14 projecting at two locations inside the fixing member 10, and the position where the sliding member 30 is pushed up and Stop at the depressed position.
[0023]
As described above, the abutting member 20, the sliding member 30, and the rotating shaft 40 are arranged between the guide walls 11 and 12, and these parts are the thick portion 24 of the abutting member 20 and the axis of the rotating shaft 40. Except for the protruding portion of the portion 41, it is flush with the surfaces of the guide walls 11 and 12, and is sealed by a cover 50 as shown in FIG. The cover 50 is formed with a window portion 51 for allowing the thick portion 24 of the contact member 20 and the shaft portion 41 of the rotating shaft 40 to protrude. In addition, a small hole 52 is formed in the cover 50.
The fixing member 10 is arranged on one side of the door as in the prior art, a fixing member (not shown) is arranged on the opposite surface of the door, and both are integrated by the connecting shaft 62. In the present embodiment, the connecting shaft 62 is disposed at a position adjacent to the outside of the guide walls 11 and 12 where the square core 1 penetrates, and the engaging portion of the contact member 20 that engages the square core 1. The rotational force applied to the shaft 23 is received by the connecting shaft 62.
[0024]
The lock according to the present invention is configured as described above, and the method of use will be described next. In the unlocked state, as shown in FIG. 1, the sliding member 30 is located on the lower side, and the contact member 20 connected to the sliding member 30 is also located on the lower side. Therefore, the engaging part 23 of the contact member 20 is removed from the square core 1 and the square core 1 can be rotated by turning a handle (not shown). When the square core 1 rotates, the latch retracts into the lock body and can be opened. The sliding member 30 and the engaging portion 23 located on the lower side maintain their positions and do not rise because the engaging portion 45 formed on the rotating shaft 40 is engaged with the spring 61.
[0025]
When locking, the knob 30 is twisted and the rotating shaft 40 is rotated to raise the sliding member 30 engaged with the sector gear 42 of the rotating shaft 40 as shown in FIG. Then, the engaging part 23 of the contact member 20 connected to the sliding member 30 is also raised, and the engaging part 23 engages with the square core 1. The raised sliding member 30 and the abutting member 20 are engaged with the engaging portion 23 without being lowered because the engaging portion 45 formed on the rotating shaft 40 is engaged with the spring 61. Maintain the state. Since the square core 1 engaged with the engaging portion 23 cannot be rotated, the latch cannot be retracted into the lock body and can be locked. Even if a person who does not know that the door is locked turns the handle outdoors, the square core 1 to which the handle is attached engages with the engaging portion 23 formed in the thick portion 24 of the abutting member 20. However, since the contact member 20 is sandwiched between the guide walls 11 and 12, it never rotates.
[0026]
Moreover, since the engaging portion 23 of the contact member 20 that engages the square core 1 is formed in the thick portion 24, the engaging portion 23 is not deformed. In particular, in the present embodiment, the contact member 20 is constituted by two contact pieces 21 and 22, which are detachably engaged with each other, so that the contact pieces 21 and 22 are driven by the rotational force of the square core 1. The guide walls 11 and 12 are pressed by being urged in the diameter expansion direction. Therefore, the rotational force of the square core 1 is directly loaded by the guide walls 11 and 12. Further, the rotational force of the square core 1 is distributed from the guide walls 11 and 12 to the entire fixing member 10. In addition, even if the contact pieces 21 and 22 of the contact member 20 are swung by the rotational force of the square core 1, they are adjacent to the contact portions between the contact pieces 21 and 22 and the guide walls 11 and 12. A connecting shaft 62 is disposed at the position. Therefore, the swinging contact pieces 21 and 22 are stopped by the connecting shaft 62 via the guide walls 11 and 12, and the guide walls 11 and 12 are not damaged. Therefore, in the lock of the invention, each part is less damaged.
[0027]
In addition, this invention is not limited to said embodiment. For example, if a material that does not break is used, it is possible to replace the two or more guide pieces with an integral contact member, or to integrate the contact member and the sliding member. It is.
[0028]
【The invention's effect】
According to the first aspect of the present invention, in the locked state, the square core is engaged with the engaging portion of the contact member, and the contact member is sandwiched between the two or more guide walls, so that it completely rotates. There is nothing. Moreover, since the engaging portion and the guide wall are not deformed, the locking function can be maintained for a long time.
[0029]
According to the second aspect of the present invention, since the contact member includes two or more contact pieces, the contact member can be prevented from being damaged. According to the third aspect of the present invention, the connecting shaft is disposed adjacent to the guide wall when the contact member is engaged with the square core, thereby preventing the guide wall from being damaged. be able to. According to the fourth aspect of the present invention, since the contact member is moved by the sliding member, the force applied to the contact member is not applied to the sliding member. It is possible to prevent the connecting portion from being damaged. Thus, the lock according to claims 2 to 4 can realize long-term use.
[Brief description of the drawings]
FIG. 1 is a front view of an unlocked state of a lock according to the present invention.
FIG. 2 is a front view of a locked state of a lock according to the present invention.
FIG. 3 is a perspective view of an essential part of a lock according to the present invention.
FIG. 4 is a front view of a cover constituting the lock according to the present invention.
FIG. 5 is a side view of a conventional lock.
FIG. 6 is a front view of a conventional lock.
[Explanation of symbols]
A rotation prevention member 1 square core 10 fixing member 11, 12 guide wall 20 abutting member 21, 22 abutting piece 23 engaging portion 30 sliding member 62 connecting shaft

Claims (4)

In the lock provided with the latch and the lock body incorporating the latch rotation mechanism, the square core connecting the handle and the lock body, and the rotation prevention member of the square core, the rotation prevention member extends in the parallel direction. and more guide walls, with sliding along the guide wall has a contact member for preventing the angular core disengageably to the rotation of the angular core, the contact member is two or more contact piece And has an engaging portion with which the square core can be engaged. When a rotational force is applied from the square core engaged with the engaging portion, the contact piece is perpendicular to the guide wall. The lock is separated into two, and the engaging portion expands, and each of the contact pieces is pressed against the guide wall.   The lock according to claim 1, wherein the abutting member has a thick portion, and an engaging portion is provided in the thick portion.   The fixing member is fixed to the front and back surfaces of the door, and the front and back surfaces are integrated by a connecting shaft. The rotation prevention member is built in at least one of the fixing members. The lock according to claim 1 or 2, wherein the lock is located at a position adjacent to a contact portion between the contact member and the guide wall when the member is engaged with the square core.   The lock according to any one of claims 1 to 3, wherein the contact member slides along the guide wall and is moved by a slide member engaged with the contact member.

Images