JPH0327832Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a writing board locking mechanism of a writing board device in which a writing board is pivotally connected in a reversible manner.

``Prior Art'' ``Problems to be Solved by the Invention'' Hitherto, there have been various types of writing board locking mechanisms in reversible writing board devices, each of which has achieved a certain degree of effectiveness. However, in these writing plate locking mechanisms, it is necessary to release the support of the writing plate when reversing the writing plate, which means that the writing plate supporting member is temporarily maintained in a state separated from the writing plate. However, there is no way to realize a rational mechanism that is simple in structure and easy to use.
In most cases, maintaining the writing plate support member apart from the writing plate requires the assistance of the operator, even if only temporarily.

Therefore, the operator is forced to inconvenience that he or she must keep the writing board support member apart from the writing board with one hand while performing the reversing operation of the writing board.

The present invention has been developed in view of the state of the prior art, and has a simple overall structure, including a structure for maintaining the state in which the writing plate support member is spaced from the writing plate, and is also easy to use. It is intended to provide a rational writing plate locking mechanism.

"Means for Solving the Problem" The present invention solves the above problem by having a writing plate support, a protrusion that extends downward from the bottom and has a concave base side, and has a constant upward elasticity. a gripping part that is biased with the gripping part; and a clamping part that faces the protruding part of the gripping part in a downward right angle direction and accommodates a ball part that is always biased with elasticity in the opposite direction. A solution to this problem is to removably attach the support member to the horizontal beam between the columns.

"Examples" and "Operations" Hereinafter, examples of the present invention will be described in detail, and their operations will be explained.

The writing board B is pivotably mounted between the supports S and S' so as to be reversible about a support shaft P. A support member 1 having a grip part 2 and a clamp part 3 is removably attached to the horizontal beam F, but the grip part 2 set on the support member 1 is always in an upward elastic state. It consists of a writing board support part 4 that supports the writing board B, and a protrusion part 5 extending downward from the bottom surface 2a of the grip part 2.
The protruding portion 5 has a base side formed in a recessed portion 5a, and is engaged with and disengaged from a gripping portion 3, which will be described later, via the recessed portion 5a.

The gripping part 3 has a structure in which a ball part 3a is housed, facing the protruding part 5 of the gripping part in a right angle direction below the protruding part 5, and always being elastically biased in the opposite direction. The biasing means and the housing structure of the bow portion 3a may be determined as appropriate, and it goes without saying that the structure is not limited to the structure in which the ball portion 3a housed in the hollow box body 6 is springed by the coil spring 7 as mentioned here. It is. Further, the gripping portion 3 is positioned so that when the gripping portion 2 is pushed down against the upward elastic force, the protruding portion 5 of the gripping portion engages with the gripping portion 3.

In the figure, 8 is a spring member that always applies an upward elastic force to the grip part 2, and 9 is a support shaft that pivots the grip part 2 to the support member 1 so as to be swingable. Also, 10
is a receiving plate member for fixing the clamping part 3 at a predetermined position on the support member 1, and
The spring member 8 is fixed to the vertical portion 10a with a screw member 14. Furthermore, reference numeral 11 is a through hole bored in the vertical portion 10a of the receiving plate member 10, and through this through hole 11, the support member 1 is removably attached to the horizontal bar F between the pillars S and S'. . Reference numeral 12 denotes a male threaded member that is screwed into a female threaded portion 13 formed in the horizontal crosspiece F.

Now, in FIG. 3, when the grip part 2 which is elastically biased upward is pushed down against the elastic force, the grip part 2 is separated from the writing board B supported by the writing board support part 4. However, since a considerable free space is obtained between both 2 and B, it becomes possible to reverse the writing board B. When a considerable amount of free space is created, that is, when the gripping part 2 is pushed down by a considerable amount, the protrusion 5 of the gripping part is positioned so as to engage with the clamping part 3, so that the gripping part 2 The concave portion 5a formed on the base side of the writing board B is engaged with the ball portion 3a of the gripping portion, which is elastically biased in the opposite direction in a direction perpendicular to the protruding portion 5, thereby maintaining the state of separation from the writing board B. (See Figure 4).

In addition, after reversing the writing board B, the support S,
In order to lock it to S', it is sufficient to release the engagement between the gripping part 2 and the clamping part 3.

That is, when the grip part 2 is pushed upward, the recess 5
The protruding portion 5 of the gripping portion, which is engaged with the ball portion 3a of the gripping portion that is reciprocally springing toward the other side through the a, prevents the engagement with the ball portion 3a from resisting the elastic force. It will be canceled.

Since the grip part 2 that is disengaged from the clamp part 3 is always biased upwardly, if the writing board B is supported by the support part 4, the writing board B will be supported safely and reliably. It will be locked to S and S'.

"Effects of the Idea" Since the present invention has the above-mentioned configuration, when the writing board is reversed, it is possible to easily maintain the separation between the grip part that supports the writing board and the writing board, and it is possible to Even when it comes to plates, it has become easier to reverse and lock them.

[Brief explanation of the drawing]

Figure 1 is an overall explanatory diagram of the writing board device in which the present invention has been implemented, Figure 2 is a front view illustrating the relational structure between the gripping part and the clamping part, which is the gist of the present invention, and Figure 3 is the A of Figure 2. -A sectional view and FIG. 4 are schematic explanatory diagrams showing the engagement relationship between the gripping part and the clamping part. DESCRIPTION OF SYMBOLS 1... Supporting member, 2... Gripping part, 3... Clamping part, 3a
...Ball part, 4...Writing plate support part, 5...Protrusion part, 5
a... recess, 8... spring member, 10... receiving plate member, B...
Writing board, F...horizontal bar, S, S'...post.

Claims (1)

[Scope of utility model registration request] A writing board device in which a writing board is pivotally mounted between pillars so as to be reversible about a support shaft, which has a writing board support part 4 and extends downward from a bottom surface 2a to form a recess 5a on the base side thereof. a gripping part 2 having a protruding part 5 and always being biased upward;
A support member 1 is provided with a clamping part 3 that faces the protruding part 5 of the gripping part in a downward right angle direction and houses a ball part 3a which is always elastically biased in the opposite direction. , S', a writing board locking mechanism in a rotary writing board device, characterized in that it is removably attached to a horizontal bar F between S'.