JPH0288821A - Locking device - Google Patents

Abstract

PURPOSE:To obtain proper locking by a method in which a cam part for driving a latch incorporated with a latch shaft in such a way as to enable it to slide in the axial direction is lowered while rotationally moving it by a given amount in the cylinder along the cam groove of a sloped track and locked with a latch stopper. CONSTITUTION:A screw part 3 for operating latch is turned one way, and a cam part 2 for turning latch is lowered while turning it by a given amount to the sloped direction to the axis through the grooved cam 22 of sloped track and a slider 42, and the slider 42 is interrupted with its turning at one end of the cam 22. The latch shaft 1 fitted with the cam part 2 and the latch 11 are turned by a given amount through the grooved cam 21 and the slider 12 by lowering the cam part 2 rotationally, and the latch 11 is coupled with the latch stopper 7 of a common groove body. Proper locking can thus be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a 1M locking device suitably used for opening and closing a cover in a common wiring groove, particularly a locking device of the type that locks and unlocks by rotating a latch. Regarding locking devices.

PRIOR ART In general, in the above-mentioned common wiring trenches, etc., the main body of the common trench is closed with a cover body for the purpose of protecting the wiring, safety, etc., and is further locked with a riveting device to prevent it from being opened accidentally. There is. These locking devices are installed by embedding the locking device in a concrete cover body to expose the latch, and horizontally rotate the latch to a fixed position inside the common groove body (inner surface of the cover body) to attach it to the inner wall of the common groove body. The lid is locked and unlocked by engaging and disengaging the provided latch.

The problem to be solved by the invention is that if the latch protrudes from the inner surface of the lid, when the lid is removed and paddy is placed directly on the ground, the weight of the lid will damage the latch and make it impossible to lock. There is a fear.

If the horizontal rotation position of the latch on the main attachment body side is fixed, it cannot be used with the common groove main body where the latch stop position is different, and there is a lack of compatibility, and the lock cannot be used for the common groove of various plans. It is uneconomical that equipment must be prepared.

In addition, when the horizontal rotation position of the latch on the lid body side is fixed and there is no error absorption means, especially in concrete common ditches where forming precision cannot be expected, it is difficult to form the locking device when embedding it in the concrete lid body. Due to errors etc., compatibility with the joint side latch upper etc. may not be achieved.

The present invention provides a locking device that effectively solves the above-mentioned problems and is suitable for use as a cover for a common wiring groove.

Means for Solving the Problems The present invention provides the above-mentioned means by inserting a latch shaft into a cylinder so that the latch provided at the lower end of the latch shaft can be moved in and out through the opening at the lower end of the cylinder, and by inserting the latch shaft into the cylinder. The latch rotation cam member and the cylindrical body are slidably fitted together in the coaxial direction via the axial grooved cam and slider, and the latch rotation cam member and the cylinder body are connected to the grooved cam and the grooved cam having an oblique trajectory with respect to the axis. A latch operating screw member is screwed into the upper end opening of the cylindrical body so that it can move forward and backward in the axial direction, and
The latch rotation cam member is rotatably suspended from the latch operation screw member.

Effect With the above configuration, when the latch operating screw member is rotated in one direction, the latch rotating cam member descends while rotating a certain amount according to the grooved cam of the inclined track, and the slide reaches one end of the grooved cam and rotates the latch. Rotation and lowering of the moving cam member are prevented, and thus the latch operating screw member is prevented from rotating, thereby ensuring fixed rotation of the latch as described below.

When the latch rotation cam member rotates and descends, @
The latch shaft and the latch rotate by a certain amount using the slide held by the linear groove cam as a motion transmission point, and, for example, engage and lock with the latch stop of the common groove body. Or conversely, the lock is released by rotating the latch a certain amount in one direction.

At this time, the guiding action of the grooved cam in the axial direction absorbs the amount of descent of the latch rotating cam member, allowing the latch shaft and latch to rotate at a fixed position to achieve the locking (unlocking). .

Father, do you turn the latch operation screw member in the other direction, contrary to the above? J
I15 When the latch rotation cam member is operated, the latch rotation cam member is raised while rotating a certain amount in the opposite direction to the above according to the grooved cam of the inclined track, and the slide reaches the other end of the grooved cam and the latch rotation cam member is rotated. Therefore, rotation of the latch operating screw member is prevented, and fixed rotation of the latch in the opposite direction is ensured.

When the latch rotation cam member rotates and descends, the latch shaft and latch rotate a certain amount in the opposite direction using the grooved cam and slider in the axial direction as motion transmission points, and release the engagement with the latch stop. and then unlock it. Or conversely, the lock can be obtained by rotating the latch a certain amount.

At this time, as in the case of forward rotation, the amount of rise of the latch rotation cam member is absorbed by the guiding action of the grooved cam in the axial direction, and the lock is released (locked) while holding the latch shaft in a fixed position. can be set.

Further, the launch shaft can be moved up and down according to the grooved cam in the axial direction, regardless of whether the launch shaft is operated or not, so that the latch can be stored inside the outer cylinder, that is, inside the lid.

Embodiments of the present invention will now be described in detail with reference to FIGS. 1 to 6.

1 is a latch shaft, and the latch shaft 1 has a latch 11 at its lower end.
It has a slider 12 at its upper end that can protrude laterally, and a lowering stop 13 at the middle of the shaft.

Reference numeral 2 denotes a latch rotation cam member, and the latch rotation cam member 2 is made of a cylindrical member, and the cylindrical wall has a cam member as shown in the figure.
It has a grooved cam 21 extending in the axial direction, and a grooved cam 22 having an oblique orbit with respect to the axis, and has a hanging hole 23 in the center of the upper end. The grooved cams 21 and 22 are provided in pairs so as to be axially symmetrical with a phase shift of 90 degrees.

FIG. 3 shows an example in which the latch rotation cam member 2 is formed by sheet metal processing.
The half-split cylinders 24, which are punched out and given an arc shape, are placed opposite each other to form a cylinder, and the grooved cam 21 in the axial direction is inserted into the slot between the opposing plate thickness surfaces of the half-split cylinders 24. the half-shaped cylindrical body 24 is connected in advance at its upper end and punched;
At the same time as the connecting piece 25 maintains the cylindrical shape, the above-mentioned hanging hole 23 is formed by punching in the connecting piece 25 at the center of the cylindrical body. Further, depending on the implementation, the lower end of the grooved cam 21 terminates at a lowering stop 26 that projects from the lower end of the half-shaped cylinder 24.

The above embodiment provides a latch rotation cam member 21 that is low cost and has double groove cams 21, 22 that are easy to process.

When the latch rotation cam member 21 is a solid cylinder with a bottom, the grooved cams 21 and 22 are cut into the cylinder wall, and the mounting hole 23 is cut into the bottom wall.

Reference numeral 3 denotes a latch operation screw member, which has a circular shape and has a male thread 31 on its outer peripheral surface, a tool light engagement hole 32 on its upper end surface, and a hanging protrusion 33 at the center of its lower end surface.

Reference numeral 4 denotes an outer cylinder, and a female thread 41 is provided on the inner peripheral surface of the upper end opening of the outer cylinder 4, and the latch operation screw member 3 is screwed into the female thread 41 to form a hermetically sealed structure. The latch operation screw member 3 may be a female screw member that is screwed into the outer peripheral surface of the upper end opening of the outer cylinder 4.

The latch rotation cam member 2 is rotatably suspended from the latch operation screw member 3 and placed inside the outer cylinder 4,
A slider 42 protruding inward from the cylindrical wall of the outer cylinder 4 is slidably fitted to the grooved cam 22 of the oblique track of the latch rotation cam member 2. The latch rotating cam member 2 is guided by the groove cam 22 and rotates while moving downward or upward. That is, it rotates diagonally around the axis.

As an example of a means for suspending the latch rotation cam member 2, the suspension protrusion 33 provided on the latch operation screw member 3 is inserted into the suspension hole 23 of the latch rotation cam member 2, and the suspension protrusion 33 is inserted into the stop ring 34. and connect it irremovably.

Further, the latch shaft l is inserted into the outer cylinder 4, and the upper end of the latch shaft is inserted into the latch rotation cam member 2, and the protrusion 12 is provided in the axial direction groove cam 21 on the cam member 2.
The latch 11 can be slid in and out of the lower end opening of the outer cylinder 4 in the slidable state. The grooved cam 21 has its lower end open or is provided with a lowering stop 26 as in the embodiment to limit the lowering of the slider 12. Further, a downward stopper 13 provided in the middle of the latch @1 is engaged with a stopper 43 provided inwardly protruding from the lower end of the outer cylinder 4 to set the maximum amount of protrusion of the latch 11 from the outer cylinder 4.

The outer cylinder 4 has a latch accommodating case 44 provided at its lower end opening, and the opening edge of the latch accommodating case 44 communicating with the outer cylinder 4 extends inward and serves as a stopper 43 for the latch shaft 1.

As shown in FIG. 6, the locking device is embedded, for example, in three or four diagonal corners of the common groove cover 6 with an outer cylinder 4,
The latch housing case 44 is embedded in the inner surface of the lid 6 in an upsetting state, and the upper end opening is opened to the outer surface of the lid. In the buried state, the latch 11 protrudes from the latch housing case 44 toward the lower inner surface of the lid body 6, rotates in the protruded state, and engages and disengages, for example, with the latch stop 7 of the common groove body.

Further, in the disengaged state, the latch 11 can freely move up and down together with the latch shaft 1 according to the axial cam 21.

Reference numeral 5 denotes a tool for rotating the latch operation screw member 3, and a screw portion 51 screwed into the female thread 41 of the upper end opening of the outer cylinder 4 at the lower end and a tool tip guard of the latch operation screw member 3 are provided at the lower end. It has a tool light 52 that engages with the matching hole 32, and a hanging hand 5 at the upper end.
It has 3.

With the above configuration, the tool light 52 of the tool 5 is inserted into the engagement hole 32 of the latch operation screw member 3, and the male screw 51 of the tool 5 is screwed into the female screw 41 of the outer cylinder 4 while being rotated in one direction. When the latch operation screw member 3 is rotated in the same direction, the latch rotation cam member 2 descends while rotating by a certain amount according to the grooved cam 22 on the inclined track, and the slider 42 reaches one end of the grooved cam 22. The latch rotation cam member 2 is prevented from rotating and lowered, and therefore the latch operation screw member 3 is prevented from rotating, thereby ensuring fixed rotation of the latch in one direction as described below.

When the latch rotation cam member 2 rotates and descends,
The latch shaft 1 and the latch 11 are rotated by a fixed amount using the slider 12 held by the axially grooved cam 21 as a motion transmitting part, and are engaged with and locked with the latch stop 7 of the common groove body, for example. Or conversely, the lock is released by rotating the latch 11 in one direction by a fixed amount.

At this time, the amount of descent of the latch rotation cam member is absorbed by the guiding action of the grooved cam 21 in the axial direction, and the latch 11 is moved in the locking direction ( can be rotated in the lock release direction).

In addition, when the tool 5 is rotated in the other direction and the latch operation screw member 3 is rotated in the same direction, the latch rotation cam member 2 follows the grooved cam 22 of the inclined track and rotates in the opposite direction. The slider 42 is pulled up while rotating a certain amount, and the slider 42
2, the latch rotation cam member 2 is prevented from rotating and rising, and thus the latch operation screw member 3 is prevented from rotating in the other direction, and the latch 11 is prevented from rotating in the other direction. A fixed amount of rotation in the direction is guaranteed.

That is, when the latch rotation cam member 2 rotates and descends, the latch shaft and latch rotate a certain amount in the opposite direction, using the sliding engagement of the first cam 21 and slider 12 in the axial direction as a motion transmission point, and the latch is stopped. The engagement with 7 is released and the lock is released. Or conversely, by rotating the latch a certain amount in the other direction, it engages with the latch stop 7 and locks.

At this time, as in the case of the above-mentioned forward rotation, the amount of rise of the latch rotation cam member 2 is absorbed by the guide action of the grooved cam 210 in the axial direction, and the latch shaft 1 is supported in a fixed position by the lowering stop 13 while the above-mentioned It is possible to release the lock.

In addition, the latch shaft 1 can move up and down according to the grooved cam 21 in the axial direction regardless of whether it is operated or not, and the launch 11 is thereby stored in the outer cylinder 4, that is, in the storage case 44, and is housed inside the lid. No way.

For example, as shown in FIG. 6C, when the lid 6 is placed directly on the ground 9, the latch 11 is hidden inside the lid.

In the above embodiment, either the protruding position, that is, the horizontal rotation position of the latch 11 is set by a lowering stop 13 provided on the shaft portion of the latch shaft 1, or the lowering stop 13 is not provided, and the lowering stop 13 is set, as shown in FIG. 6B. The lower surface of the latch 11 is the support surface on the latch stop 7 side,
For example, it is possible to adopt a structure in which the latch is supported on a support surface 8 defined on the inner wall of the common groove main body, and the latch is rotated while sliding on the support surface to engage and disengage from the latch area. Even if there is an error or standard difference in the height of
The grooved cam 21 absorbs the difference and locks and unlocks the lock.

Furthermore, even if there is the lowering stopper 13, the latch @1'EL and the latch 11 can be moved up and down according to the groove cam 21 by using this as the bottom dead center, and using this up-and-down movement, the latch 11 can be moved to the support surface 8 which has a difference from the others. The above-mentioned locking and unlocking can be performed properly while supporting the device.

In the above embodiment, the latch rotation cam member 2 is a cylinder and the latch shaft l is inserted into the cylinder.However, in contrast to this, the latch rotation cam member 2 is inserted into the latch shaft. The latch rotation cam member 2 may have a nested structure, and the latch rotation cam member 2 may be a cylinder with a truncated cylinder such as a half cylinder or the like, and may be engaged with the latch shaft.

The tools 5 for rotating the latch are screwed into locking devices arranged at the corners of the lid 6 in a common groove or the like using threaded parts 51, and lifted up using the hanging hands 53. It also functions as a means.

Effects of the Invention According to the present invention, the latch can move up and down freely according to the grooved cam in the axial direction, so even when the lid body with the locking device attached is removed and placed directly on the ground, the latch can be moved according to the cam groove in the axial direction. The latch rises together with the latch shaft, allowing the latch to be stored inside the lid, effectively preventing the latch and the parts that move it from being damaged by the heavy double lid when placed directly.

Furthermore, the grooved cam and slider in the diagonal direction ensure fixed rotation of the latch in the forward and reverse directions, and the grooved cam and slider in the axial direction ensure fixed rotation of the latch operating screw member and the latch rotation cam member. The motion is accurately transmitted to the latch shaft, the latch and the latch stop can be properly locked and unlocked, and lock defects can be reliably prevented.

Furthermore, when the latch operating screw member and the latch rotating cam member rotate and descend, the vertical movement component is absorbed by the grooved cam in the axial direction, and the latch shaft receives only the rotational component to keep the latch constant. It can be rotated horizontally at certain positions to engage and disengage the latch. Furthermore, even if there is some dimensional error, if the latch stop or the introduction part of the latch is provided with an inclination, the latch can be adjusted upward according to the grooved cam in the axial direction and brought into engagement.

Moreover, by utilizing the structure in which the latch shaft can move up and down according to the grooved cam in the axial direction with respect to the latch rotation cam member, the vertical position of the latch can be adjusted to the latch stop position of the mating device, for example, the common groove for wiring. In addition, it can be rotated to engage and disengage at a position that suits this, making the locking device economical and compatible for use with different types of common grooves with different latching positions. It is true.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a locking device showing an embodiment of the present invention, Fig. 2 is a perspective view of a latch shaft, Fig. 3 is a perspective view of a cam member for rotating the latch, and Fig. 4 is a perspective view of a locking device according to an embodiment of the present invention. A perspective view of the latch operation screw member, FIG. 5 is a sectional view of the latch operation screw member and the latch rotation cam member suspended therefrom, and FIG. 6A.
, B, and C are cross-sectional views of the 1M lock device, in which A shows the locked (unlocked) state, B shows the unlocked (locked) state, and C shows the state placed directly on the ground. DESCRIPTION OF SYMBOLS 1... Latch shaft, 11... Latch, 12... Slider, 2... Cam member for latch rotation, 21... Groove cam in the axial direction, 22... O, 1 track structure Cam, 3... Screw member for latch operation, 31... Male thread, 32... Tool light engagement hole, 4... Outer cylinder, 41... Female thread, 42...
...Nameko. Figure 1

Claims (1)

[Claims] A latch shaft having a latch at one end and a latch rotation cam member are slidably connected to each other so as to be movable in the coaxial direction via a grooved cam and a slider in the axial direction, and the latch shaft and the latch rotation cam member are inserted into the cylinder. The cylindrical body and the latch rotation cam member are slidably connected to each other so as to be rotatable in the same inclination direction through the grooved cam and slider having an oblique orbit with respect to the axis, and the latch operation screw is inserted into the cylindrical body. A locking device characterized in that the members are screwed together so as to be movable back and forth in the axial direction, and the latch rotation cam member is rotatably suspended from the latch operation screw member.