JPH0227425Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a guide device for guiding and moving a table or a workpiece in a desired direction.

[Prior art]

Conventionally, various guide devices of this type have been implemented. For example, in a compact disc player, the turntable is attached to the player body so as to be removable and removable, and is moved in and out by a drive device. Furthermore, it is essential to set the turntable in a centered state within the player body. An example of a device for this purpose is a guide device that guides and moves the turntable in a desired direction. In this guide device, guide rollers are fixedly disposed in the direction of movement, and abut and engage with both side walls of the turntable to guide the turntable and enable centering.

However, in such conventional guide devices, the guide rollers on both sides are fixedly attached, so the movement accuracy of the turntable depends on the gap between the turntable and the side wall. A lot has changed. For example, if the gap is set large, play may occur in the turntable, which not only deteriorates the appearance but also reduces centering accuracy, making it difficult to set the disc accurately and making it impossible to perform correct reading operations. On the other hand, if the gap was small, the turntable would not move easily and lacked smoothness.
Furthermore, if the side wall of the turntable is curved due to a mold defect, it may even be impossible to insert or remove the turntable.

[Disclosure of the invention] This invention was made to improve the above-mentioned drawbacks of the conventional technology, and has a simple structure that allows the table or workpiece to be guided and moved in a desired direction and set or transferred in a centered state. The purpose of the present invention is to provide a guide device that has the following features.

In order to achieve this purpose, this idea
A fixed roller disposed on the base of the device main body so as to abut and engage with one of both side walls of the table or workpiece along the moving direction, and a plurality of fixed rollers each having one end rotatably attached to the base. a link, a movable roller attached to each other end of these links and abutting/engaging with the other side wall of the table or workpiece, and one end each attached between each other end side of the link, a tension spring that applies a biasing force to the link that exceeds a tensile force on the link generated by at least movement of the table or workpiece, and presses the movable roller against the table or workpiece without separating the link; Each link is arranged so that a line segment connecting the attachment position to the base and the abutment/engagement position of the movable roller with the table or workpiece is inclined with respect to the moving direction of the table or workpiece. A guide device with the following gist is adopted.

According to this device configured in this way, when moving the table or workpiece, it eliminates play regardless of the accuracy of the side wall of the turntable, improves centering accuracy during setting or transfer, and reduces costs due to its simple configuration. The cost can be reduced.

[Best form for implementing the idea]

Hereinafter, one embodiment of this invention will be described in detail based on the drawings.

In this embodiment, this invention is applied to, for example, a guide device for a turntable in a compact disc player. The structure of this embodiment is shown in FIGS. 1 to 3. In the drawings, reference numeral 1 denotes a player main body, and a slot 4 for inserting and removing a turntable 3 is formed on the front side of the main body along with an operating section 2. The turntable 3 slides out to the front from this slot 4, and after the disk 6 is set, the turntable 3 is housed in the player body 1. Although such a turntable 3 is movable by a drive device 5, it is necessary to guide and move the turntable 3 in a desired direction. Since the center ring of the disk 6 influences the detection performance of the laser beam reflected by the surface of the disk 6, the guide of the turntable 3 is preferably made as accurate as possible. A guide device 7 is provided to realize this highly accurate guide. As shown in FIGS. 2 and 3, the guide device 7 has a guide roller with both flanges, and a convex guide rail 9 formed on the side wall 8 of the turntable 3 is interposed between these flanges and engaged. , it also eliminates the vertical play to some extent. A plurality of guide rollers that move while guiding the turntable 3 in this manner are attached along the moving direction. The guide roller that abuts and engages one of the side walls 8 of the turntable 3 is a fixed roller 10 that is attached by fixing the shaft 11 to the base 12. Note that the fixed roller 10 side is positioned and fixed with respect to the base 12 side with accuracy kept within a predetermined tolerance. On the other hand, a guide roller that abuts and engages with the other of the side walls 8 of the turntable 3 is a movable roller 13 . That is, the shaft 11 of this movable roller 13 is attached to the tips of two links 14 rotatably attached to the base 12. These two links 14 are opposite to each other with respect to the moving direction of the turntable 3 and are inclined at the same angle. In this embodiment, two links 14 whose one ends are connected to each other by pins have an isosceles triangular shape, with movable rollers 13 attached to the other ends of each link. A tension spring 15 is interposed between the shafts 11 of these two movable rollers 13 and tensioned, and the tension of the tension spring 15 causes the movable rollers 13 to move the link 14 in a direction in which they approach each other. It is designed to be rotated. Here, the tension spring 15 is one that exerts a biasing force that is at least larger than the moving force of the turntable 3 by the drive device 5. As a result, the movable roller 13 is free from the risk that the urging force of the link 14 to the turntable 3 will disappear due to the moving operation of the turntable 3, and therefore the turntable 3 is always fixed to the fixed roller. 10 side and guided movement in the axial direction in a centered state suppressed within a predetermined tolerance.

Next, the effect will be explained.

To set up the turntable 3 equipped with such a guide device in the player body 1, first press the operation button that activates the drive device 5, and the rack and pinion of the drive device 5 will cause the turntable to turn. Table 3 moves. However,
The turntable 3 moves to a predetermined position inside the player body 1, but the two links 14 are in an inclined state.
A tension spring 15 acts on the movable rollers 13 in the direction of approaching each other, and therefore the movable rollers 13 attached to each end of each link 14 press the turntable 3 against the fixed roller 10 with equal force. Press. As a result, the turntable 3 is pressed to the left by these movable rollers 13, in other words, the turntable 3 is pressed against the fixed roller 10, and is housed in the player body 2 while being correctly positioned by the fixed roller 10. To go. In this way, play between the movable roller 13 and the other side wall 8 of the turntable 3 is eliminated, and the turntable 3 is pressed against the fixed roller 10, so that the play between the fixed roller 10 and one of the side walls 8 of the turntable 3 is eliminated. The backlash will also be eliminated. The turntable 3 is guided in the direction in which the fixed roller 10 is arranged, that is, along the axial direction, and can be set in a centered state.

Further, since the guide device of this embodiment is composed of two links 14, one of these two links 14, that is, the side in the traveling direction with respect to the turntable 3, is The one on the opposite side performs a "biting" action, and the one on the opposite side performs a "biting" action. In other words, the load acting on the turntable 3 is constant both when entering and exiting. Therefore, the turntable 3 has the same speed regardless of the direction in which it moves in and out, that is, it has substantially the same speed when it enters and when it leaves.

Therefore, since the guide device of this embodiment presses the turntable with two equal forces using two links, for example, one movable roller is attached to the tip of one link. There are no large speed differences that you would expect to occur when moving a turntable in and out.
As a result, the turntable 3 runs in a stable state, and rattling can be effectively prevented from occurring.

This not only enables smooth guiding movement with a simple configuration, but also reduces costs. Further, even if the side wall 8 of the turntable 3 is slightly warped or otherwise deformed, this can be tolerated, and no centering failure will occur during guided movement.

Note that this invention is not limited to the above-mentioned embodiments, and various modifications can of course be made. For example, in this embodiment, a guide device for a turntable has been described, but the invention is not limited to this, and the present invention can be applied to a guide device that guides and moves a workpiece in a desired direction.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing a guide device according to an embodiment of the invention, FIG. 2 is a front view of the guide device, and FIG. 3 is a cross-sectional view of the guide device. 3... Turntable, 8... Turntable side wall, 10... Fixed roller, 12... Base, 1
3...Movable roller, 14...Link, 15...Tension spring.

Claims (1)

[Claims for Utility Model Registration] A fixed roller disposed on the base of the device main body so as to abut and engage with one of both side walls of the table or workpiece along the moving direction; a plurality of links rotatably attached; movable rollers attached to the other ends of these links and abutting and engaging with the other side walls of the table or workpiece; and each other end of the links. One end of each is attached between the rollers, and a biasing force that exceeds at least a tensile force on the links generated by the movement of the table or workpiece is applied to the links to press the movable rollers against the table or workpiece without separating them. and a tension spring, which adjusts the attachment position of the link to the base and the contact and contact of the movable roller with the table or workpiece.
A guide device characterized in that each link is arranged so that a line segment connecting the engagement position is inclined with respect to the moving direction of the table or the workpiece.