JP3162602U - Latching device - Google Patents

Abstract

There is provided a latching device that does not sprinkle iron powder to the outside even when a latching tightening degree is adjusted or when a second member is rotated with respect to the first member in the latched state. A washer, a base member 2, an operating lever 3 pivotally attached to the base member 2, a connecting member 5 pivotally attached to the operating lever 3, a hook member 6 coupled to the connecting member 5, and a connection A displacement mechanism for displacing the hanging member 6 with respect to the member 5 is provided. Further, the displacement mechanism is configured by screwing the female screw N2 and the male screw N1, and the operating member 3 is rotated in a state where the hanging member 6 is hung on the washer, whereby the washer is pulled by the hanging member 6. In the stopping device, the hook member 6 has a cylindrical portion 6a, the connecting member 5 has a shaft portion, the cylindrical portion 6a has a bottom at one end, the other end is open, and the inner peripheral surface of the cylindrical portion 6a. A female screw N2 is provided, a male screw N1 is provided on the shaft portion, and an elastic member 15 that closes the opening of the cylindrical portion is provided. [Selection] Figure 2

Description

The present invention relates to a latching device that fastens and latches a second member such as a box and a first member such as a lid.

A latching device disclosed in the following Patent Document 1 is connected to a plate 1 fixed to a body to be tightened A, a seat plate 6 fixed to a body to be tightened B, and a seat plate 6 so as to be rotatable. The main configuration includes a lever 8, a shaft support member 13 rotatably connected to the lever 8, and a screw rod 14 screwed into the shaft support member 13. When the lever 8 is rotated in a state where the engaging portion 14 a of the screw 14 is hooked on the metal plate 1, the pivot point (the small diameter projecting shafts 11 a and 11 b) of the shaft support member 13 is centered on the pivot point of the lever 8. Rotate. When the pivot point of the pivot member 13 rotates to a position beyond the line connecting the contact point of the metal plate 1 and the screw 14 and the pivot point of the lever 8, the lever 8 is returned by tension and the latch is released. There is no fear of such.

As described above, the screw 14 and the shaft support member 13 are screwed together. Specifically, the screw hole 12 of the shaft support member 13 and the screw 14 are screwed together. Thereby, the screw 14 can be displaced with respect to the shaft support member 13, and the latching tightening degree of the metal plate 1 and the screw 14 can be adjusted.

Japanese Utility Model Publication No. 56-46442

When the screw is rotated with respect to the shaft support member to adjust the fastening tightening degree, the screw hole and the screw are rubbed to generate powder (or metal powder when the screw and the shaft support member are made of metal). appear. In particular, when a body to be tightened is installed in a clean room, powder may be scattered in the clean room and adversely affect electronic components being manufactured. Further, in a state where the pair of tightened bodies are tightened, a strong force acts on the screw hole and the screw. When the other tightened body rotates with respect to one tightened body in the tightened state, a strong force is acting on the screw hole and the screw thread even if this rotation is a minute angle. Powder (metal powder when the screw and the shaft support member are made of metal) is generated. Also at this time, the powder may be scattered in the clean room and adversely affect the electronic parts being manufactured. In view of the above problems, the present invention is suitable for adjusting the tightening degree of tightening, or even when the second member is rotated with respect to the first member and the two members are tightened in the latched state. An object of the present invention is to provide a latching device that does not scatter the outside.

In order to solve the above problem, according to claim 1 of the present invention, a washer fixed to the first member, a base member fixed to the second member, and an operation pivotally attached to the base member A lever, a connecting member pivotally attached to the operation lever, a hanging member coupled to the connecting member, and a displacement mechanism for displacing the hanging member with respect to the connecting member, wherein the displacement mechanism includes a female screw and a male screw. In the latching device in which the washer is pulled by the latching member by rotating the operation lever in a state where the latching member is hung on the washer, one of the connecting member and the latching member has a cylindrical portion. The other of the connecting member and the hanging member has a shaft portion, the tube portion has a bottom at one end thereof, the other end portion is open, an internal thread is provided on the inner peripheral surface of the tube portion, and the shaft portion is An elastic member is provided to provide a male screw and close the opening of the cylindrical portion. According to claim 2 of the present invention, a ring-shaped elastic member is wound around the outer peripheral surface of the shaft portion, and the elastic member is elastically contacted with the inner peripheral surface on the opening side of the cylindrical portion.

Even when the tightening tightening degree is adjusted or when the first member rotates with respect to the second member in the latched state, the powder generated by rubbing is not scattered outside, for example, The powder does not scatter in the clean room and does not adversely affect the electronic parts being manufactured.

The best mode for carrying out the invention will be described below with reference to the drawings. The latching device 1 prevents the lid A from being opened or removed from the box B. The latching device 1 is composed of a metal washer 20 fixed to the lid A and a main body 10 fixed to the box B. As shown in FIGS. 6 and 8, the washer 20 is fixed to the lid A with a screw through the hole 21. On the other hand, the main body 10 is attached to the box B by fixing a base member 2 described later to the box B with a screw. And the lid A is prevented from being opened or removed from the box B by pulling the washer 20 with the main body 10.

As shown in FIG. 9, the main body 10 includes a metal base member 2 fixed to the box B, a metal operation lever 3 rotatably connected to the base member 2, and the operation lever 3. A metal connecting member 5 that is rotatably connected and a metal hanging member 6 that is coupled to the connecting member 5 are provided. The base member 2 is formed in a plate shape. The base member 2 is fixed to the box B through a hole 2a provided in the base member 2 through a screw. The base member 2 includes a pair of bearing portions 2b for enabling the operation lever 3 described later to rotate.

As shown in FIG. 9, supported portions 3a are provided on the left and right sides of one end of the operation lever 3, and through holes 3b are provided in the pair of supported portions 3a. As shown in FIG. 3, synthetic resin ring members 7 are fitted into the pair of through holes 3b. The ring member 7 has a hole 7a through which a metal shaft pin 8 is passed. By inserting the shaft pin 8 supported by the bearing portion 2 b of the base member 2 into the hole 7 a of the ring member 7, the operation member 3 can be rotated with respect to the base member 2. In addition, as shown in FIG. 3, the front-end | tip part 8a of the shaft pin 8 is crimped so that the shaft pin 8 may not detach from the hole 7a of the ring member 7. A metal seat 11 is interposed between the head 8 b of the shaft pin 8 and the ring member 7. A rubber cap 9 is fitted to the head 8b of the shaft pin 8 in order to improve the appearance.

As shown in FIGS. 2 and 9, the operation lever 3 has an operation portion 3A that curves upward. Moreover, as shown in FIG. 4, a pair of board parts 3c and 3c protrude on the back side. The pair of plate portions 3c and 3c are provided with holes 3d and 3d for receiving the shaft pin 12, respectively. Since the shaft pin 12 also enters the hole 5 a of the connecting member 5, the shaft pin 12 enables the connecting member 5 to rotate with respect to the operation lever 3. In addition, synthetic resin bushes 13 and 13 are interposed between the connecting member 5 and the operation lever 3 so as not to contact each other.

As shown in FIG. 9, a shaft portion (shaft portion) 5b is formed on the upper side of the connecting member 5, and a male screw N1 is provided on the outer peripheral surface above the shaft portion 5b. A groove 5d for supporting an O-ring 15 described later is provided below the shaft-like portion 5c in the drawing.

As shown in FIG. 9, the hanging member 6 includes a bottomed tube portion 6 a that supports the shaft-like portion 5 b of the connecting member 5, and a pair of arms 6 b and 6 b that extend from the vicinity of the bottom of the tube portion to two forks. And a latch pin 6c that connects the tip ends of the pair of arms 6b, 6b, and a buffer body 6d that covers the latch pin 6c. The end portion in the direction opposite to the end portion on which the bottom surface of the cylindrical portion 6a is located is open. A female thread N2 is provided on the inner peripheral surface near the bottom surface of the cylindrical portion 6a. On the contrary, the inner peripheral surface 6e close to the opening of the cylindrical portion 6a is not provided with a female screw and has a curved surface. The connecting member 5 and the hanging member 6 are connected by the shaft-like part 5b entering the inside of the cylindrical part from the opening of the cylindrical part 6a and the female screw N2 and the male screw N1 being screwed together.

With the above configuration, when the hooking member 6 is rotated clockwise and counterclockwise with respect to the connecting member 5, the hooking member 6 is displaced in the longitudinal direction with respect to the connecting member 5 due to the characteristics of the screw. Can do. FIG. 2 shows a state in which the hook member 6 is displaced downward in the drawing with respect to the connecting member 5. FIG. 5 shows a state in which the hook member 6 is displaced upward in the drawing with respect to the connecting member 5. Therefore, the male screw N1 and the female screw N2 constitute a displacement mechanism N that adjusts the degree of displacement of the hook member 6 with respect to the connecting member 5. The displacement mechanism N can displace the hanging member 6 with respect to the connecting member 5 from the state shown in FIG. 2 to the state shown in FIG.

As described above, the elastic O-ring 15 is fitted in the groove 5d of the shaft-like portion 5b. When the O-ring 15 is fitted in the groove 5d, the outer surface of the O-ring protrudes slightly outward from the outer peripheral surface of the shaft-shaped portion. Thus, an O-ring (elastic member) is provided between the cylindrical portion 6a and the shaft-shaped portion 5b. Accordingly, when the hook member 6 is displaced with respect to the connecting member 5 in the range from the state of FIG. 2 to the state of FIG. 5, the inner peripheral surface 6 e slides while rotating with respect to the O-ring 15. At this time, since the O-ring 15 and the inner peripheral surface 6e are always in elastic contact with each other, the gap between the opening of the cylindrical portion and the shaft portion is completely closed, and the displacement mechanism N (the male screw N1 and the female screw N2) It is sealed inside the cylindrical portion 6a.

Usually, the displacement mechanism N (the male screw N1 and the female screw N2) is made of metal so that the displacement mechanism N is not damaged even if the hooking member is pulled with a strong force with respect to the connecting member 5. For this reason, when the female screw N2 is rotated with respect to the male screw N1 in order to adjust the degree of displacement of the hanging member 6 with respect to the connecting member 5, iron powder is generated due to rubbing. However, as described above, since the displacement mechanism N is sealed in the cylindrical portion 6a, iron powder does not come out of the cylindrical portion 6a.

The usage method of the said latching apparatus 1 is demonstrated based on FIG.7 and FIG.8. First, the operating lever 3 is rotated in the direction of R1 around the pivot point C with respect to the base member 2 (see FIG. 7). At this time, as shown in FIG. 7, the pivot point D of the connecting member 5 and the control lever 3 rotates around the pivot point C in response to the rotation of the control lever. Therefore, when the control lever is rotated in the R1 direction, the hanging member 6 Can be brought close to the hook 22. Then, when the operating pin 3 is rotated in the R2 direction (the direction opposite to R1) while the hooking pin 6c of the hooking member 6 is hooked on the hook 22 of the washer 20, and is hooked, the hooking member 6 is moved against the hook 22. Move in the direction of leaving. The operation lever 3 rotates in the R2 direction, and the pivot point D of the connecting member and the manipulation member rotates to the position shown in FIG. 8 beyond the line connecting the contact point of the hook and the latch pin and the pivot point C. Then, the operating lever 8 is not returned by the tension force in the R1 direction and is not released.

  As described above, since the displacement mechanism N is provided between the connecting member 5 and the hanging member 6, the tightening force between the washer 20 and the main body 10 can be changed. By changing the tightening force, the lid A can be tightly tightened to the box B to be completely sealed, or conversely, it can be loosely tightened for easy operation. When displacing, as described above, the iron powder generated by rubbing between the male screw N1 and the female screw N2 is not outside the cylindrical portion 6a. It is possible to prevent the electronic parts from being adversely affected by being scattered inside.

In addition, even when the lid A is rotated in the horizontal direction with respect to the box B in a state where the lid A is hooked to the box B (the hook 22 is pulled by the hook member 6), The iron powder caused by rubbing is not scattered in the clean room and does not adversely affect the electronic parts being manufactured.

In the present embodiment, the hook member 6 is provided with the cylindrical portion 6 a and the connecting member 5 is provided with the shaft-like portion 5 b. However, the hooking member 6 may be provided with the shaft-like portion and the connecting member 5 may be provided with the cylindrical portion. Good.

It is a figure which shows the main-body part of this invention, (a) is a front view, (b) is a side view. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is sectional drawing which shows the displacement mechanism of this invention. It is a figure which shows the washer of this invention, (a) is a front view, (b) is a side view. It is a figure which shows the state before hooking the main-body part of this invention on a washer. It is sectional drawing which shows the state which hooked the main-body part of this invention on the washer. It is a disassembled perspective view of the latching device of the present invention.

A lid (first member)
B box (second member)
DESCRIPTION OF SYMBOLS 1 Latching device 2 Base member 3 Operation lever 5 Connecting member 5b Shaft-shaped part (shaft part)
6 Hanging member 6a Tube portion 10 Body portion 15 O-ring (elastic member)
20 Washer N1 male screw (displacement mechanism)
N2 female thread (displacement mechanism)

Claims (2)

A washer fixed to the first member, a base member fixed to the second member, an operating lever pivotally attached to the base member, a connecting member pivotally attached to the operating lever, and the connecting member And a displacement mechanism for displacing the hanging member with respect to the connecting member, the displacement mechanism is configured by screwing a female screw and a male screw, and the washer is attached to the washer. In the latching device that pulls the washer by the latching member by rotating the operation lever with the latching member hung, one of the coupling member and the latching member has a cylindrical portion, The other of the hook members has a shaft portion, the tube portion has a bottom at one end thereof, the other end portion is open, the female screw is provided on the inner peripheral surface of the tube portion, and the shaft portion has the An elastic member is provided to provide a male screw and close the opening of the cylindrical portion. Latching device according to claim Rukoto. The latching device according to claim 1, wherein the ring-shaped elastic member is wound around the outer peripheral surface of the shaft portion, and the elastic member is elastically contacted with the inner peripheral surface on the opening side of the cylindrical portion. .

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