JPH03103Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a locking device for a rotating double-sided blackboard that can lock a rotatable double-sided blackboard in an immovable state.

[Conventional technology]

Conventionally, the middle parts of both sides of a blackboard, which has a frame around the periphery and is black or white on both sides, are rotatably mounted on both supports, and storage racks are placed horizontally at intervals below the blackboard. In the rotating double-sided blackboard, the blackboard is locked using a locking means such as a screw operation.

[Problems to be solved by the invention] The invention enables easy locking and release in a so-called one-touch manner without the troublesome operations required in the past. It can be performed smoothly and well,
The present invention is provided so that it can be suitably implemented with a compact structure.

[Means for solving problems]

Therefore, in the present invention, a support body having an engaging body on the upper part that is movable and protrudes from the outer periphery by being pressed by a bullet is erected above the middle of the storage holder, and the support body is slidably fitted into the support body. A groove with a tapered surface on the upper side is formed in the lower inner peripheral surface of the mating cylinder, and a locking body that can be detachably engaged with the frame of the blackboard is fixed at the upper end of the cylinder. It is something.

[Effect]

Therefore, the engaging body can be moved up and down smoothly with just enough resistance to press the engaging body against the inner peripheral surface, and even if you try to lift the engaging body without restriction, the engaging body will not fit into the groove. The locking body will not come off due to being unable to be engaged and lifted, and in this state the locking body can be successfully engaged with the frame of the blackboard, and when the locking body is lightly pushed down,
The engaging body can be removed from the groove along the tapered surface of the groove, and the engaging body can be removed from the edge frame of the blackboard and smoothly pushed down.

〔Example〕

Next, the embodiment shown in the drawings will be described.

A is a blackboard whose both sides are black or white, and a frame 1 having a concave portion 1a on the outer periphery is fitted to both the upper and lower edges of the blackboard A, and a frame 1 is also fitted to each side edge of the blackboard A. and both pillars 2 standing on both sides.
The middle portions of blackboard A on both sides are rotatably supported on the upper portions of a and 2b via support shafts 9a and 9b, respectively.
Both supports 2a are placed at both ends at a distance below the blackboard A.
A wide storeroom holder B that can receive chalk powder or place chalk, etc., is fitted to the connecting pipe 10 that is connected to the support 2b and installed horizontally, and installed horizontally, and is installed vertically below both supports 2a and 2b. At the lower ends of both supporting legs 11a and 11b, both leg rods 12a are respectively curved outward in a concave shape.
Connect the middle part of 12b, and connect both leg rods 12a, 12b.
A caster 13 is attached to the lower side of both ends, and a connecting rod 14 is connected between the supporting legs 11a and 11b.

An outer cylinder 1 with a cylindrical support 5 inside is located above the storeroom pedestal B at the middle in the longitudinal direction and the middle in the width direction.
5 is erected, and the bolts 16 inserted through the connecting pipe 10, storage pedestal B, and outer cylinder 15 are attached to the support 5.
Screw it into the screw hole 17 on the lower side of the support body 5 and fix it.
A horizontal hole 18 passing through in the diametrical direction is formed in the upper part of the housing, and the ammunition 3 is inserted into the horizontal hole 18, and both pin-shaped engaging bodies 4, which are pressed outward by the ammunition 3, are inserted laterally. It is configured to be fitted into both ends of the hole 18 so as to be freely retractable. Furthermore, a groove 7 into which the engaging bodies 4, 4 can be fitted is formed in the circumferential direction on the lower inner circumferential surface of the cylinder 6 which can be slidably fitted between the support 5 and the cylinder 6. , a tapered surface 7a is formed on the upper side of the groove 7, and a hook part 8a on the outer periphery of the locking body 8 fixed to the upper end of the cylinder body 6 is formed so that a finger can be caught. 8 is formed with a protrusion 8b which can be removably fitted into the recess 1a of the edge frame 1.

Therefore, as shown in FIGS. 1 and 2, when the locking body 8 is lifted and the protrusion 8b is fitted and engaged with the recess 1a of the edge frame 1, both the locking bodies 4 , 4 are fitted into the grooves 7 of the cylindrical body 6, the cylindrical body 6 is supported, and the blackboard A can be locked against rotation.

Support shafts 9a and 9b are used to use the other side of blackboard A.
When rotating blackboard A around the center, hook part 8a
When the locking body 8 is pushed down as shown by arrow A, the cylinder body 6 is pushed down and both the engagement bodies 4, 4 are smoothly retracted into the support body 5 while being guided by the tapered surface 7a. Then, move away from the edge frame 1 and push down the locking body 8 all the way, and the sixth
As shown in the figure, the cylindrical body 6 is fitted into the outer cylinder 15, and the state shown in FIG.
When locking, the locking body 8 can be engaged with the edge frame 1 by simply lifting it as described above.

[Effect of idea]

In this way, the present invention allows the blackboard A to be properly locked and rotated because it can be engaged with and disengaged from the edge frame 1 simply by moving the locking body 8 up and down. When moving up and down, the engagement body 4 is guided by the tapered surface 7a of the groove 7 and moves toward and out of the groove 7, so the locking body 8 can be moved up and down smoothly and easily. This allows the locking body 8 to be prevented from coming off due to the engagement between the engaging body 4 and the groove 7, and has the advantage of being able to operate smoothly and having a compact structure that can be carried out suitably.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of an embodiment of the present invention.
Fig. 2 is a front view of the entire blackboard, Fig. 3 is a right side view thereof, Fig. 4 is a partially omitted plan view, Fig. 5 shows a part of Fig. 1, and Fig. 6 is a side view of the blackboard. FIG. 1 is an explanatory diagram of the operation, and FIG. 7 is a front view thereof. 1... Edge frame, A... Blackboard, 2a, 2b... Support, B... Storage cradle, 3... Bullet machine, 4... Engaging body, 5... Support body, 6... Cylindrical body, 7a ... Tapered surface, 7 ... Groove, 8 ... Locking body.

Claims (1)

[Scope of utility model registration request] The intermediate portions of both sides of a blackboard A, which has an edge frame 1 around it and is black or white on both sides, are rotatably supported on both supports 2a and 2b, and a storage stand B is placed below the blackboard A at a spaced interval. In the rotating double-sided blackboard configured by horizontally disposing a blackboard, a support 5 having an engaging body 4 on the upper part which is movable and protrudes by being pressed by a bullet 3 from the outer periphery is erected above the middle of the storage pedestal B. A groove 7 whose upper side is a tapered surface 7a is formed in the lower inner circumferential surface of the cylinder 6 which is slidably fitted into the support 5, and the upper end of the cylinder 6 is provided with an edge of the blackboard A. A locking device characterized in that a locking body 8 is fixedly attached to a frame 1 and can be detachably engaged with the frame 1.