JPH0627458B2 - Switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an opening / closing device which is generally used for an object requiring reciprocating motion, such as a sliding door of an analytical instrument or a measuring instrument. It is about.

(Prior Art) Normally, a motor that can rotate in the forward and reverse directions is used for the sliding door, and limit switches are installed at the opening operation completion position and the closing operation completion position, respectively. It is being done.

(Problems to be Solved by the Invention) Many small and low-priced motors can only rotate in one direction and cannot perform forward / reverse rotation, and thus cannot be used in conventional sliding doors.

Further, since parts such as control limit switches and relays for switching between forward and reverse rotations of the motor have a life, if those parts fail, the door may be damaged or the motor may be burned.

INDUSTRIAL APPLICABILITY The present invention makes it possible to use a small-sized, low-priced one-way rotation motor by rotating the motor in only one direction to open and close the door. The purpose is to prevent accidents such as burnout of.

(Means for Solving the Problems) The switchgear of the present invention will be described with reference to FIG. 1 showing an embodiment, and is driven by a motor rotating in one direction to form an outer portion of a winding member (2). A winding transmission mechanism (8) having a protrusion (10) and a part of an opening / closing member (12) instructed to reciprocate in a direction parallel to the moving direction of the linear portion of the winding member (2). And is capable of engaging with the protrusion (10) at a position sandwiching the outside of the wrapping member (2), and is supported so as to be displaceable in a direction orthogonal to the moving direction of the linear portion of the wrapping member (2). The pair of engaging members (16, 18) and the engaging member (16 or 1) engaged with the protrusion (10) immediately before completion of the opening operation or immediately before completion of the closing operation of the opening / closing member (12).
8) are respectively provided at the positions reached by the engaging members (1
6 or 18) and an engaging member (16 or 18) for displacing the engaging member (16 or 18) away from the wrapping member (2). 24) and an opening operation detection switch (26) and a closing operation detection switch (2) which are activated when the opening operation or closing operation of the opening / closing member (12) is completed to stop the rotation of the motor.
8) and are provided.

(Operation) During the opening operation, the protrusion (10) moves rightward in the figure along one side of the wrapping member (2), and the engagement member (1)
6) is pushed rightward in the drawing to open the opening / closing member (12), and immediately before the completion of the opening operation, the engaging member (16) is wound along the inclined portion of the lifter (22) for completing the opening operation. 2) is displaced so as to move away, and eventually the engaging member (1
6) and the protrusion (10) are disengaged. At the same time, the opening operation detection switch (26) is actuated to stop the motor and the opening operation is completed.

During the closing operation, the motor rotates in the same direction as during the opening operation. The protrusion (10) moves leftward in the figure along the other side of the winding member (2), and pushes the other engaging member (18) leftward in the figure to open and close the opening / closing member (12). The closing member is closed, and immediately before the completion of the closing operation, the engaging member (18) is displaced along the inclined portion of the closing member for completing the closing operation (2) away from the wrapping member (2), and eventually the engaging member ( 18) and the projection (10) are disengaged. At the same time, the closing operation detecting switch (28) is activated to stop the motor, and the closing operation is completed.

(Embodiment) FIG. 1 is a front view showing an embodiment, and FIG. 2 is a left side view of FIG.

Reference numeral 2 denotes a chain as a winding member, which is wound between a sprocket 4 attached to a motor shaft of a motor (not shown) that rotates only in one direction and a sprocket 6 that freely rotates and is shown in the upper part of the drawing. The straight part moves to the right,
The lower straight part moves to the left. The chain 2 and the sprockets 4 and 6 form a winding transmission mechanism 8. Chain 2
A protrusion 10 is attached to the outer side of the.

Reference numeral 12 denotes a door as an opening / closing member, which is supported by a door holder 14 so as to be capable of reciprocating in a direction parallel to the moving direction of the linear portion of the chain 2 (left-right direction in the drawing). . A pair of engaging members 16 and 18 as engaging members are attached to the door holder 14 at positions sandwiching the two linear portions of the chain 2 from the outside. Engaging member 16,
18 are rotatably supported in the outward direction, that is, the engaging member 16 is in the upward direction and the engaging member 18 is in the downward direction, as shown in FIG.
Are pulled inward by each of them, and are oriented in the horizontal direction when they do not come into contact with displacement members 22 and 24, which will be described later. The engaging members 16 and 18 in the horizontal state are positioned so that the engaging member 16 engages with the protrusion 10 when the door 12 opens and the engaging member 18 engages with the protrusion 10 when the door closes. Has been done.

A displacing member 22 for completion of the opening operation is provided at a position where the engaging member 16 reaches just before the completion of the opening operation of the door 12. The displacing member 22 has an inclined portion on the upper right side in the figure, and this inclined portion abuts on the distal end portion of the engaging member 16 as the engaging member 16 advances, displacing the distal end of the engaging member 16 upward. I will let you. Further, immediately before the completion of the closing operation of the door 12, the engaging member 18
A displacing member 24 for completing the opening operation is provided at a position reached by. The displacing member 24 has a slanting portion on the left side in the drawing, and this slanting portion abuts on the distal end of the engaging member 18 as the engaging member 18 advances, and displaces the distal end of the engaging member 18 downward. I will let you.

Reference numeral 26 denotes a microswitch for detecting the opening operation of the door 12, which is provided at a position where the door 12 contacts the door 12 when the opening operation of the door 12 is completed. When the micro switch 26 operates, the rotation of the motor that rotates the sprocket 4 stops. Reference numeral 28 denotes a microswitch for detecting the closing operation of the door, which is provided at a position where the door 12 contacts when the closing operation of the door 12 is completed. Even if the micro switch 28 is activated, the rotation of the motor for rotating the sprocket 4 is stopped.

The operation of this embodiment will be described.

1 and 2 show a state during the opening operation. The upper linear portion of the chain 2 is moved to the right by the rotation of the motor, and the projection 10 provided on the chain 2 pushes the engaging member 16 to the right to move the door 12 to the right and open it. Go. Immediately before the opening operation of the door 12 is completed, the engagement member 16 contacts the displacement member 22, and the displacement member 2
Rotate upward along the sloped part of 2. As a result, the engaging portion between the engaging member 16 and the protrusion 10 moves upward, and as a result, the protrusion 10 disengages from the engaging member 16 and is engaged as shown in FIGS. 3 and 4. While passing under the member 16, the force pushing the door 12 to the right is also released,
The door 12 stops at that position. Further, at that time, the limit switch 26 comes into contact with the door 12 and is turned on to stop the motor for rotating the sprocket 4. This completes the opening operation of the door 12.

Then, the signal for closing the door causes the motor to start rotating in the same direction again. The projection 10 passes under the engaging member 16 and goes around the sprocket 4 and advances to the left along the lower linear portion of the chain 2, and from now on, as shown in FIG. By pushing 18 to the left, the door 12 is moved to the left and closed.

Immediately before the closing operation of the door 12 is completed, the engagement member 18 contacts the displacement member 24 (FIG. 1) and rotates downward along the inclined portion of the displacement member 24. As a result, the engaging portion between the engaging member 18 and the protrusion 10 moves downward, and eventually the protrusion 10 separates from the engaging member 18 and passes over the engaging member 18, and the door 12 is pushed leftward. The power is also released,
The door 12 stops at that position. At that time, the limit switch 28 (FIG. 1) comes into contact with the door 12 and is turned on, and the motor for rotating the sprocket 4 is stopped.
This completes the closing operation of the door 12.

In the above embodiments, the combination of the sprockets 4 and 6 and the chain 2 is used as the winding transmission mechanism, but other winding transmission mechanisms such as a combination of a pulley and a belt or a combination of a pulley and a steel wire are used. May be used.

The engaging members 16 and 18 are configured to make sliding contact with the inclined portions of the displacing members 22 and 24. However, for example, a bearing may be provided at a portion where the engaging members come into contact with the displacing members so that they can make rolling contact. Good.

Further, although a pair of rotatably supported engaging members 16 and 18 are used as engaging members that engage with the protrusions 10,
For example, a pair of engaging portions that are slidably supported while maintaining a horizontal state and biased inwardly toward each other may be used.

(Effect of the Invention) According to the present invention, the motor that drives the winding transmission mechanism does not need to rotate in the forward and reverse directions, and may be a motor that rotates only in one direction. Therefore, a small and low-cost motor can be used. As a result, the switch can be made inexpensive and compact.

Further, even if the limit switch or the like breaks down, the door and the motor are not unduly loaded, so that it is possible to prevent the door from being damaged and the motor from being burned.

[Brief description of drawings]

FIG. 1 is a schematic front view showing one embodiment in a state of opening operation,
FIG. 2 is a left side view of FIG. 1, FIG. 3 is a schematic front view of a main part showing the same embodiment in a state where the opening operation is completed, and FIG. 4 is a left side view corresponding to FIG. FIG. 5 is a schematic front view of a main part of the same embodiment in a closing operation. 2 ... Chain, 4, 6 ... Sprocket, 8 ... Winding transmission mechanism, 10 ... Protrusion, 12 ... Door, 16, 18 ... Engaging member, 22, 24 ... Displacement member, 26, 28 ...... Rimi switch.

Claims (1)

[Claims] 1. A motor driven in one direction,
A winding transmission mechanism having a projection on an outer portion of the winding member, and a part of an opening / closing member supported so as to reciprocate in a direction parallel to a moving direction of a linear portion of the winding member, A pair of engagement members that are capable of engaging with the protrusions at a position sandwiching the outside of the member, and that are displaceably supported in a direction orthogonal to the moving direction of the linear portion of the wrapping member; The engaging member engaging with the protrusion is provided at a position which reaches immediately before the completion of the opening operation or the completion of the closing operation of the member, respectively, and abuts the engaging member to bring the engaging member into the wrapping member. A displacement member for completion of opening operation and a displacement member for completion of closing operation, each of which has an inclined portion for displacing the opening / closing member, and an opening for stopping rotation of the motor upon completion of opening operation or completion of closing operation of the opening / closing member. Operation completion switch Pitch and closing machine comprising a switch closing operation complete, the.