JPH0536604Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" The present invention relates to a device for preventing pitching and rolling of a carrier that is moved along the axial direction of a linear guide bar by wheels provided on the carrier. .

[Conventional technology]

The conventional transport platform and its vertical and horizontal sway prevention device,
This will be explained based on FIGS. 2 and 3. FIG. 2 is a schematic top view of the conveyance table and its pitching/rolling prevention device, and FIG. 3 is a sectional view taken along the axis A--A in FIG. 2. In FIG. 2, members with the same reference numerals as in FIG. 3 are the same members.

In FIG. 3, a U-shaped groove 11a is formed in the conveyance base portion 11, and a feed screw 1 extending in the direction perpendicular to the plane of the paper is provided in the U-shaped groove 11a.
A feed screw bearing portion 13 that is screwed into the feed screw bearing portion 2 is disposed with a clearance therebetween. The feed screw bearing part 13 is connected to a conveyance plate 14 attached to the upper part of the conveyance base part 11.
It is provided integrally with the conveyance base section 11 via. The transport base portion 11 and the transport plate 14 constitute a transport platform. In order to prevent the feed screw 12 from moving in the axial direction even when the feed screw 12 rotates, both ends of the feed screw 12 are supported by a shaft support means (not shown). In FIG. 2, wheels 16a to 16c mounted on linear guide bars 15a and 15b extending along the axial direction of the feed screw 12 are pivotally supported on the conveyance base portion 11. Also,
The wheels 16d and 16e are rotatably installed in notches 11b and 11c provided in the conveyance base 11, and are mounted on the linear guide bar 1 along the horizontal direction.
5b. The conveyance base portion 11 is connected to the linear guide bar 15a by the wheels 16a to 16e.
When moving along the axial direction of the transport base 15b, in order to prevent the transport base 11 from shaking in the X direction (horizontal direction) as shown in FIG.
An auxiliary wheel 17a is pivotally supported on the conveyor base portion 1d, and two auxiliary wheels 17b and 17c are pivotally supported on the lower part of the conveyance base portion 11 in order to prevent shaking in the Y direction (vertical direction). In addition, the linear guide bar 15a,
15b has an intersection on its outer diameter, and in order to absorb the intersection, eccentric pins 18a to 18c are used to fit on the respective auxiliary wheels 17a to 17c, and the ends of the eccentric pins 18a to 18c are respectively stopped. screw 19a
It is fixed to the conveyance base part 11 by ~19c.

With such a structure, by rotating the feed screw 12, the conveyance base portion 11 is moved to the wheels 16a to 1 through the feed screw bearing portion 13 and the conveyance plate 14.
6e, the linear guide bars 15a and 15b are moved in the axial direction.
However, the auxiliary wheels 17a to 17c prevent the vehicle from shaking.

[Problems to be solved by the invention] In order to eliminate gaps between the linear guide bars 15a, 15b and the auxiliary wheels 17a to 17c while the conveyance base portion 11 is moving, it is actually necessary to use the auxiliary wheels 17a.
17c are pressed against each linear guide bar 15a, 15b. For this reason, an exchange of forces occurs between the linear guide bars 15a, 15b and the auxiliary wheels 17a to 17c, and the auxiliary wheels 17
Since the wheels a to 17c are rotatably fixed to the conveyance base portion 11, the more force they receive, the lower the durability of the auxiliary wheels 17a to 17c. Furthermore, the eccentric pins 18a to 18c must be further fixed to prevent displacement when abnormal external force is applied, and highly durable parts are required to withstand the fixing force. Furthermore, it takes time and effort to attach the three auxiliary wheels 17a to 17c to the conveyance base portion 11.

Therefore, the present invention was developed in view of the above-mentioned problems, and aims to provide a device for preventing pitching and rolling of a transport platform, which aims to improve the durability of the training wheels without requiring much time and effort to attach the training wheels. shall be.

[Means for solving the problem]

In order to achieve the above object, the present invention will be explained based on FIGS. 1 and 4 corresponding to the embodiment. a plurality of wheels 16a to 16c provided on; the wheels 16b, 16 provided on one side 1a of the left and right sides of the conveyance platforms 1, 14;
From c, a notch 11 formed in a portion of the same side surface 1a located toward the bottom of the conveyance tables 1 and 14.
Wheels 16d, 16e provided on b, 11c
Auxiliary wheels 6 provided on the conveyance tables 1 and 14; A pair of linear guide bars 15a and 15b formed in a cylindrical shape and located parallel to each other; The pair of linear guide bars 15a and 15b are provided. In between, the bottoms of the conveyance tables 1 and 14 are inserted, and the plurality of wheels 16a to 16c are brought into contact with the upper parts of the pair of linear guide bars 15a and 15b, respectively. Said one side 1a
One of the linear guide bars 1 located near
5b, the cutout portion 1 of the transport platform 1, 14
The wheels 16d and 16e located at 1b and 11c
, the pair of linear guide bars 15a, 15b
furthermore, the auxiliary wheels 6 are brought into contact with the lower part of one of the linear guide bars 15b, and the transfer tables 1, 14 are brought into contact along the axial direction of the linear guide bars 15a, 15b. In the vertical and horizontal vibration prevention device for the conveyance table, which prevents the conveyance tables 1 and 14 from shaking when the conveyance tables 1 and 14 are moved by the auxiliary wheels 6, a Of both sides of the vertical plane Y including the installation position of the linear guide bar 15b, the auxiliary wheel 6 , and forms an angle of 45 degrees around the circumference of the outer peripheral surface of the one linear guide bar 15b with respect to one surface Y1 of the vertical surface Y located below the horizontal surface X, and On the other hand, the auxiliary wheel 6 of the above-mentioned shaft support
An elastic member 2 is provided to apply a biasing force P toward the one linear guide bar 15b to the auxiliary wheel 6 of the shaft support in a plane inclined in the direction of the linear guide bar 15b.

[Effect]

According to the present invention, since the biasing force is applied to the auxiliary wheels 6 by the elastic member 2, the respective wheels 16b, 16c,
Even if component forces Py and Px in the vertical and horizontal directions are generated by the biasing force P on 16d and 16e, and even if the conveyance tables 1 and 14 move in the axial direction of the guide bars, one side in FIG. Due to the balance between the force P1 exerted by the wheels 16b and 16c and the vertical component force Py, the force P2 exerted by the other wheels 16d and 16e is further increased.
Due to the balance between Px and the horizontal component force Px, the above-mentioned conveyance platform does not sway in the vertical and horizontal directions, and the auxiliary wheels 6 can suppress lateral and pitching oscillations. In addition, installation is easy by simply attaching the elastic member 2 provided with the auxiliary wheels 6 to the conveyance tables 1 and 14, and furthermore, the elastic member 2 absorbs external force from one linear guide bar 15b via the auxiliary wheels 6. Because of this, there is no exchange of force between the linear guide bar 15b and the auxiliary wheels 6 as in the conventional case, and it is possible to obtain a device for preventing shaking of the conveyor table that increases the durability of the auxiliary wheels 6.

〔Example〕

An embodiment of the present invention will be described based on FIG.

FIG. 1 is a schematic cross-sectional view showing a state in which the leaf spring 2 is attached to the bottom surface of the conveyance base portion 1. In FIG. 1, members having the same reference numerals as in FIG. 3 are the same members.

In FIG. 1, one end 2a of a strip-shaped leaf spring 2
is bent at right angles toward the conveyance base portion 1, and a first auxiliary wheel 3 whose rotating shaft is positioned in the horizontal direction is pivotally supported at the portion 2a. The other end 2b of the leaf spring 2 has a first ridgeline 5a that is connected to the first surface 4a and the second surface 4b, and a second ridgeline 5b that is connected to the second surface 4b and the third surface 4c. , are sequentially provided from the transport base part 1 to the outside of the base part 1. The second surface 4b is bent at 45 degrees toward the conveyance base 1 with respect to the first surface 4a, and the third surface 4c is bent at 90 degrees clockwise in the figure with respect to the second surface 4b. On the third surface 4c, a rotation axis is attached to the third surface 4c.
A second auxiliary wheel 6 located in a direction perpendicular to the surface 4c is pivotally supported. The intermediate portion 2c of the leaf spring 2 is fixed to the bottom surface of the conveyance base portion 1 by fixing pins 7a and 7b, and by this fixing, the first auxiliary wheel 3 is brought into contact with one linear guide bar 15a, and the second auxiliary wheel 3 is brought into contact with one linear guide bar 15a. The ring 6 is brought into contact with the other linear guide bar 15b. In addition, each auxiliary wheel 3, 6 is provided with a linear guide bar 15.
In the axial direction of a and 15b, there is an auxiliary wheel 17 in FIG.
It is located in the same way as a and 17b.

FIG. 4 is an enlarged view showing the area around the right linear guide bar 15b in FIG. In this figure, with respect to one surface Y1 located below the horizontal plane X including the installation position of the linear guide bar 15b among the vertical plane Y including the installation position of the linear guide bar 15b,
The guide bar 15 is located in a plane that forms a 45 degree angle around the circumference of the outer peripheral surface of the guide bar 15b and is tilted toward the auxiliary wheel 6 in the figure with respect to the above-mentioned surface Y1.
The urging force P directed toward b is applied to the auxiliary wheel 6 by the leaf spring 2.
When given, the following actions and effects can be obtained.

That is, the above-mentioned biasing force P is applied to the wheels 16b and 16c that contact the upper part of the guide bar 15b and the wheels 16d and 16e that contact the guide bar 15c in the horizontal direction, respectively, in the vertical and horizontal directions. Component forces Py and Px are generated in the directions, and the rotation of the feed screw 12 in Fig. 1 causes the feed screw bearing part 1 to
Even if the conveyance plate 14 and the conveyance base part 1 move in the axial direction of the guide bar through the wheels 16b and 16c, as shown in FIG. , further wheels 16
Due to the balance between the force P2 caused by d and 16e and the horizontal component force Px, the conveyance plate 14 and the conveyance base part 1 do not sway in the vertical or horizontal direction.
Vertical and horizontal vibrations can be suppressed.

As mentioned above, the first auxiliary wheel 3 is pivotally supported on one end 2a of the leaf spring 2, but the first auxiliary wheel 3 is not provided, and the second auxiliary wheel 3 is not provided at the other end 2b to collectively prevent each of the above-mentioned swings. By providing only the ring 6, the structure can be further simplified.

Further, the first auxiliary wheel 3 described above, the feed screw 12 and the feed screw bearing part 13 in FIG. 1 are removed, and the conveying plate 1 is
4 and the transfer base 1 in the axial direction of the guide bar, even if the transfer base 1 is moved to the left in FIG. 1 by an external force greater than the restoring force of the leaf spring 2, the following will occur. The shaking will not become large, and the shaking can be suppressed.

By moving the conveyance base part 1 to the left, the guide bar 15 of the plate spring 2 is moved from the conveyance base part 1 to the left.
The portion protruding toward b is elastically deformed, but the leaf spring 2 has a biasing force P that biases the linear guide bar 15a unless a certain limit is exceeded, so the leaf spring 2 does not exert any force on the linear guide bar 15b. Force P is the fifth
As shown in the figure, the wheel 16b is moved from the original position to the destination position, and even at that position, the urging force P causes the wheels 16b,
A component force Py' in the vertical direction is generated against the wheel 16c, and the component force Py' is applied to the wheel 16 via the guide bar 15b.
In order to balance the force P1 caused by b and 16c, the above-mentioned conveyance base portion 1 does not sway in the vertical direction.

Also, when the conveyance base part 1 moves to the left, the fifth
Wheels 16d and 16e in the figure are linear guide bars 1
5b, but since the lower part of the other side of the base part 1 contacts the linear guide bar 15a in FIG. 1, the horizontal vibration can be suppressed slightly.
Furthermore, the moving conveyance base section 1 is moved by the elastic member 2.
Even if the wheels 16d and 16e in FIG. 5 come into contact with the guide bar 15b when moving to the right due to the restoring force or external force, the action is as follows.

The protruding portion of the leaf spring 2 is deformed by its own restoring force, and the biasing force P on the guide bar 15b returns to its original position.
At the same time that 16e abuts against the guide bar 15b,
The wheels 16d, 16e are biased by the biasing force P as shown in FIG.
A horizontal component force Px is generated with respect to the wheel 16d, 6e, and the component force P is transmitted to the wheel 16d, 6e through the guide bar 15b.
Since the force P2 exerted by 16e is balanced, the abutting wheels 16d, 16e do not bounce off the guide bar 15b significantly, and lateral shaking can be slightly suppressed.

Wheel 1 is further moved back to its original position by the urging force P.
A component force Py in the vertical direction is generated with respect to 6b and 16c,
Therefore, pitching can also be suppressed by balancing the force P1 exerted by the wheels 16b and 16c.

Therefore, even if the elastic member 2 is elastically deformed, component forces are generated in the vertical and horizontal directions due to the aforementioned biasing force P that exists within the elastic member 2, and in balance with the force exerted by one of the wheels 16b and 16c Furthermore, due to the balance with the force exerted by the other wheels 16d and 16e, the horizontal and vertical vibrations of the conveyance plate 14 and the conveyance base portion 1 do not become large.
Each vibration can be suppressed.

In short, to suppress horizontal and vertical vibrations,
Each wheel 16b, 16c, 16d, 16e generates force in the vertical direction and horizontal direction,
As an ideal configuration for realizing this, as shown in FIG.
It is better to set the angle between the direction and the surface Y1 to 45 degrees.

According to the above embodiment, the leaf spring 2 is used as the elastic member, but the elastic member is not limited to this. A filigree spring is used, and one end of the filigree spring is wound up while being fixed to the support pin of the auxiliary wheel. Needless to say, the above purpose can be achieved by fixing the other end of the spring to the conveyance base part 1 and bending the portion of the spring up to the one end so as to apply the biasing force to the auxiliary wheel. .

Furthermore, unlike the conventional method (see Figure 2), there is no need to provide a space for supporting the auxiliary wheels at the bottom of the transport base 1, and by reducing the height of the transport base, the size can be reduced. .

[Effect of idea]

According to the present invention, in order to apply the above-mentioned biasing force toward one linear guide bar to the auxiliary wheels by means of an elastic member, two types of wheels that come into contact with each other in both the horizontal and vertical directions as described above are used. Component forces in the horizontal direction and the vertical direction are generated for each of the two types of wheels, and the above-mentioned auxiliary wheels can prevent the vibrations in the horizontal direction and the vertical direction by balancing with the two types of wheels.

In addition, installation is easy by simply attaching the elastic member provided with the auxiliary wheels to the conveyor base, and since the elastic member absorbs the external force from the linear guide bar via the auxiliary wheels, the linear guide There is no exchange of force between the bar and the training wheels, and the durability of the training wheels can also be increased.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a device for preventing pitching and rolling of a transport platform according to an embodiment of the present invention. FIG. 2 is a schematic top view of a conventional device for preventing pitching and rolling of a transport platform. 3 is a sectional view taken along the axis A-A in FIG. 2. FIG. FIG. 4 is an enlarged view showing the vicinity of the linear guide bar 15b located on the right side in FIG. FIG. 5 is a diagram for explaining the effect when the conveyance plate 14 and the conveyance base part 1 in FIG. 1 move to the left in the figure. Explanation of symbols of main parts, 1... Conveyance base part,
2...Plate spring, 6...Training wheel, 14...Transportation plate,
16a, 16b...wheels.

Claims (1)

[Claims for Utility Model Registration] (1) A conveyor; a plurality of wheels provided at the top of each of the left and right sides of the conveyor; and a plurality of wheels provided on one of the left and right sides of the conveyor; a wheel provided in a notch formed in a portion of the same side surface located toward the bottom of the conveyance table from the wheels; an auxiliary wheel provided on the conveyance table; formed in a cylindrical shape; , a pair of linear guide bars located parallel to each other; the bottom of the conveyance table is inserted between the pair of linear guide bars, and the plurality of wheels are respectively connected to each of the pair of linear guide bars. The wheels located in the notch portion of the conveyance table are attached to one of the linear guide bars that is brought into contact with the upper part and located near the one side surface of the conveyance table;
The pair of linear guide bars are brought into contact with each other along a horizontal direction passing through them, and the auxiliary wheels are brought into contact with a lower part of the one of the linear guide bars, so that the conveyance platform moves along the axial direction of the linear guide bars. In the conveyor table vertical and horizontal sway prevention device, which prevents the conveyor table from shaking by the auxiliary wheels, the conveyor table is fixed to the conveyor table and further includes a vertical axis including the installation position of the one linear guide bar. The auxiliary wheels are pivotally supported on the opposite side of the surface from the conveyor table and below the horizontal plane including the installation position of the one linear guide bar, and the auxiliary wheels are located below the horizontal plane of the vertical plane. Said one linear guide bar in a plane forming an angle of 45 degrees around the circumference of the outer peripheral surface of said one linear guide bar with respect to said one plane and tilted toward said auxiliary wheel of said shaft support with respect to said one plane. A device for preventing pitching and rolling of a conveyance platform, characterized in that an elastic member is provided to apply a biasing force toward the guide bar to the auxiliary wheels of the shaft support. (2) The elastic member is a plate spring, one end of which is fixed to the conveyance table, and the other end protrudes from the conveyance table toward the one linear guide bar, and this protruding portion is fixed to the one linear guide bar. A request for registration of a utility model characterized in that the auxiliary wheel is pivotally supported on the protruding portion while avoiding contact with the guide bar, and the biasing force is applied to the one linear guide bar via the auxiliary wheel. Scope 1: The conveyance first pitching and rolling prevention device according to item 1.