JP2020193642A - Movable element and roller guide device - Google Patents

Abstract

To provide a movable element for a roller guide device which can be fitted without depending on an expert, and to provide a roller guide device using the movable element.SOLUTION: A movable element 1 includes: a carriage 10 having a longitudinal direction L and a width direction W orthogonal to each other; a pair of first rollers 40 supported to the carriage 10; a pair of second rollers 50 supported to the carriage 10 while having an interval in the longitudinal direction L relative to the first rollers 40; and an interval adjustment mechanism for imparting elastic force in a direction in which the first rollers 40 and the second rollers 50 relatively come close to each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mover that is an element of a roller guide device.

The roller guide device includes a guide rail in which a pair of guide surfaces are formed on opposite side surfaces, a roller that rolls on each of the guide surfaces of the guide rail, and a carriage that supports the rollers across the guide rails. (For example, Patent Document 1).
Since the roller guide device uses rollers, it has advantages such as low friction loss and low running noise.

However, as suggested in Patent Document 1, the advantage of the roller guide device is that the roller and the carriage supporting the roller can be obtained with a high level of dimensional accuracy and can be attached to the guide rail with high accuracy. It is a premise. Therefore, it is necessary to rely on an expert to manufacture a member of the roller guide device such as a roller and to attach a guide rail of the member.

Jikkenhei 5-96547 Gazette

Therefore, an object of the present invention is to provide a mover of a roller guide device that can be attached without relying on an expert and a roller guide device using the mover.

The mover of the roller guide device in the present invention includes a carriage having length and width directions orthogonal to each other, a pair of first rollers supported by the carriage, and a carriage spaced apart from the first roller in the length direction. It is provided with a pair of second rollers supported by. Further, the mover includes an interval adjusting mechanism for adjusting the interval between the first roller and the second roller by an elastic force.

The carriage in the present invention preferably applies an elastic force in a direction relatively close to the first carriage supporting the first roller, the second carriage supporting the second roller, and the first carriage and the second carriage. It includes an interval adjusting mechanism having an elastic body.

The spacing adjusting mechanism in the present invention preferably includes an elastic body supported by one of the first carriage and the second carriage, and an elastic force transmitter supported by the other of the first carriage and the second carriage. In the spacing adjusting mechanism of the present invention, the elastic body and the elastic force transmitter are engaged with one of the first carriage and the second carriage.

The elastic force transmitter in the present invention is preferably provided so as to penetrate the inside of the first carriage and the second carriage.
The elastic force transmitter in the present invention is preferably supported by one of the first carriage and the second carriage via a bush.

The elastic body in the present invention is preferably provided at one end in the longitudinal direction of the carriage.
The elastic body in the present invention preferably comprises a disc spring.

In the mover of the present invention, the boundary between the first carriage and the second carriage is preferably provided so as to be offset from the center in the length direction away from the elastic body.

In the mover of the present invention, it is preferable that the diameter of the first roller is D40, the diameter of the second roller is D50, the distance between the pair of first rollers is d40, and the distance between the pair of second rollers is d50. D50 and d40 <d50 hold.

The present invention provides a roller guide device including a guide rail whose side surfaces facing each other form a first guide surface and a second guide surface, and a mover that travels while being guided by the guide rail.
The mover in this roller guide device includes a pair of first rollers and a pair of second rollers that roll on each of the first guide surface and the second guide surface, and the first roller and the second roller straddling the guide rail. It is provided with a supporting carriage. The carriage has a first carriage that supports the first roller, a second carriage that supports the second roller, and an elastic body that applies an elastic force in a direction relatively close to the first carriage and the second carriage. It is equipped with a mechanism.

According to the mover of the present invention, since the distance adjusting mechanism for adjusting the distance between the first roller and the second roller by the elastic force is provided, the first roller and the second roller are pressed against the guide rail by the elastic force. Therefore, according to the present invention, since accuracy is not required to attach the mover to the guide rail, the mover can be attached to the guide rail in a short time even if the person is not an expert. Further, according to the mover of the present invention, the mover can be easily attached to the guide rail even if the dimensional accuracy of the members themselves such as the first carriage and the second carriage is not high. Further, according to the mover of the present invention, if the pressurization by the elastic body is appropriately set in advance, the members such as the first roller and the second roller may be damaged due to the excessive pressurization, or the pressurization may be caused by long-term operation. There is no need to reset the pressurization according to the wear of the member.

It is a front view which shows the mover of the roller guide which concerns on embodiment of this invention. It is a bottom view of the mover of FIG. (A) is a right side view of the mover of FIG. 1, and (b) is a left side view of the mover of FIG. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is an enlarged view of the part B of FIG. 4, (a) is a pair of disc springs in an extended state, and (b) is a pair of disc springs in a shortened state.

Hereinafter, the mover of the roller guide device according to the present invention will be described with reference to the drawings based on a preferred embodiment.
The mover 1 according to the present embodiment has a structure in which the first roller 40 and the second roller 50 obtain a force for sandwiching the guide rail 100 of the roller guide device 3 by an elastic force. As a result, even if the processing accuracy of the member constituting the mover 1 is low, it can be easily attached to the guide rail 100.
Hereinafter, after explaining the configuration and action of the mover 1, the effect of the mover 1 will be referred to. As shown in FIG. 1, the horizontal direction H and the vertical direction V are defined. Further, in the mover 1, as shown in FIGS. 1 to 3, the length direction L, the width direction W, and the height direction Hi that are orthogonal to each other are defined. Further, in the present embodiment, it is assumed that the guide rail 100 has a race track shape, and as shown in FIG. 1, the inner peripheral side In and the outer peripheral side Out are defined.

[Overall configuration of mover 1]
As shown in FIGS. 1 to 4, the mover 1 includes a carriage 10 and a first roller 40 and a second roller 50 rotatably supported by the carriage 10. The carriage 10 includes a first carriage 20 and a second carriage 30.
The mover 1 travels along the guide rail 100 while sandwiching the guide rail 100 between the pair of first rollers 40 supported by the first carriage 20 and the pair of second rollers 50 supported by the second carriage 30. .. The first carriage 20 and the second carriage 30 are attached via a disc spring 38 as an elastic body, and an elastic force is applied in a direction in which they are relatively close to each other.
The first carriage 20, the second carriage 30, the first roller 40, and the second roller 50 are made of a metal material, a ceramic material, a resin material, or the like having mechanical properties such as desired hardness and strength. When these members are made of a metal material and the roller guide device 3 is used in a corrosive environment, it is preferable to use stainless steel. The same applies to the disc spring 38.

[Carriage 10]
As shown in FIG. 1, the carriage 10 supports the first roller 40 and the second roller 50 across the guide rail 100. The carriage 10 is divided into a first carriage 20 and a second carriage 30, the first carriage 20 rotatably supports a pair of first rollers 40, and the second carriage 30 rotatably supports a pair of second rollers 50. I support it. The pair of first rollers 40 and the pair of second rollers 50 are provided on the first carriage 20 and the second carriage 30 at intervals in the length direction L, respectively.

[First carriage 20]
As shown in FIGS. 1 to 4, the first carriage 20 has a rectangular parallelepiped appearance as an example, and the upper surface 21, the bottom surface 22 facing the upper surface 21, and the upper surface 21 and the bottom surface 22 are on the inner peripheral side. It includes a first side surface 23 connected by In, and a second side surface 24 connecting the upper surface 21 and the bottom surface 22 with an outer peripheral side Out.
The first carriage 20 is formed with a shaft hole 25 through which the support shaft 41 of the first roller 40 passes through the upper surface 21 and the bottom surface 22. Since the first carriage 20 supports the pair of first rollers 40, two shaft holes 25 are provided at intervals in the width direction W as shown in FIG.
Further, the first carriage 20 is formed with a fastening hole 26 penetrating the first side surface 23 and the second side surface 24 for passing a fastener for connecting the first carriage 20 and the second carriage 30. ..

[Second carriage 30]
As shown in FIGS. 1 to 4, the second carriage 30 has a rectangular parallelepiped appearance as an example, and has an upper surface 31, a bottom surface 32 facing the upper surface 31, and an upper surface 31 and a bottom surface 32 on the inner peripheral side. It includes a first side surface 33 connected by In, and a second side surface 34 connecting the upper surface 31 and the bottom surface 32 with an outer peripheral side Out.
The second carriage 30 is formed with a shaft hole 35 for passing the support shaft 51 of the second roller 50 through the upper surface 31 and the bottom surface 32. Since the second carriage 30 supports the pair of second rollers 50, two shaft holes 35 are provided at intervals in the width direction W as shown in FIG.
Further, the second carriage 30 is formed with a fastening hole 36 penetrating the first side surface 33 and the second side surface 34 for passing a fastener for connecting the first carriage 20 and the second carriage 30. ..

[Assembly of the first carriage 20 and the second carriage 30]
The first carriage 20 and the second carriage 30 are assembled by fastening means as described below. That is, as shown in FIG. 4, the fastening bolt 27 is inserted into the fastening hole 26 from the side of the first side surface 23 of the first carriage 20, and the fastening bolt 27 is inserted into the fastening hole 36 from the side of the second side surface 34 of the second carriage 30. Insert the fastening bolt 37. Further, a high nut 28 is inserted from the fastening hole 26 through the fastening hole 36, and the fastening bolt 27 and the fastening bolt 37 are fastened by the high nut 28. The head of the fastening bolt 27 is supported by the first carriage 20, and the head of the fastening bolt 37 is supported by the second carriage 30. Further, the fastening bolt 27, the high nut 28, and the fastening bolt 37 penetrate the inside of the first carriage 20 and the second carriage 30 except for the heads of the fastening bolt 27 and the fastening bolt 37.

The combination of the fastening bolt 27, the high nut 28, the fastening bolt 37, and the disc spring 38 is an example of the spacing adjusting mechanism in the present invention. Further, among them, the fastening bolt 27, the high nut 28 and the fastening bolt 37 are examples of the elastic force transmitter in the present invention. The elastic force transmitter in the present embodiment includes a fastening bolt 27, a high nut 28, and a fastening bolt 37, but this is only an example, and the present invention includes an elastic force transmitting body composed of one fastening bolt and a nut. To do.
In this embodiment, as shown in FIG. 4, a pair of spacing adjusting mechanisms including a fastening bolt 27, a high nut 28, a fastening bolt 37, and a disc spring 38 are provided at intervals in the width direction W. This makes it possible to prevent the first carriage 20 and the second carriage 30 from rotating relative to each other in the longitudinal direction L.

The high nut 28 is supported by the first carriage 20 via the first bush 29 on the side of the first side surface 33, and the fastening bolt 37 is supported by the second bush 39 via the second bush 39 on the side of the second side surface 34. It is supported by the carriage 30. Therefore, the axes of the fastening bolt 27, the high nut 28, and the fastening bolt 37 are accurately positioned with respect to the first carriage 20 and the second carriage 30. As a result, the accuracy of the relative positional relationship between the first roller 40 supported by the first carriage 20 and the second roller 50 supported by the second carriage 30 in the width direction W is high.

The high nut 28 is slidably supported in the axial direction of the first bush 29, and the fastening bolt 37 is slidably supported in the axial direction of the second bush 39.
The first bush 29 and the second bush 39 are members also called slide bearings, and are made of a material having a small coefficient of friction. The first bush 29 and the second bush 39 are typically composed of a copper alloy, but a resin having a small coefficient of friction such as polytetrafluoroethylene (PTFE) on the surface of other metal materials, ceramic materials, etc. It is also possible to use the one coated with.

As shown in FIGS. 4 and 5, the fastening bolt 37 is supported by the second carriage 30 via an engagement relationship with two disc springs 38 supported by the second carriage 30 (second bush 39). .. As a result, a tensile axial force is generated on the fastening bolt 37 and the high nut 28 and the fastening bolt 27 connected to the fastening bolt 37, and accordingly, between the first carriage 20 and the second carriage 30, in other words, the first An elastic force is applied between the roller 40 and the second roller 50 in a direction relatively close to each other. Therefore, as shown in FIG. 1, the first roller 40 supported by the first carriage 20 and the second roller 50 supported by the second carriage 30 have the first guide surface 101 of the guide rail 100 and the first guide surface 101 of the guide rail 100 due to this elastic force. It is pressed against the second guide surface 103.

The fastening bolt 37 that presses the disc spring 38 and the disc spring 38 against the second carriage 30 is provided at the end of the outer peripheral side Out of the guide rail 100 of the carriage 10.
The reason why the two disc springs 38 are used is to increase the distance (stroke) that the first carriage 20 and the second carriage 30 can relatively move. When it is desired to further lengthen the stroke, three or more disc springs 38 can be stacked, and if the stroke may be short, only one disc spring 38 may be interposed.

Comparing the first carriage 20 and the second carriage 30, the dimension of the second carriage 30 in the length direction L is about twice that of the first carriage 20. That is, the mover 1 is preferably provided with the boundary between the first carriage 20 and the second carriage 30 deviated from the center in the length direction L. More specifically, the boundary between the first carriage 20 and the second carriage 30 is provided so as to be offset from the center of the length direction L in a direction away from the disc spring 38. This is particularly related to the position where the first bush 29 is provided. That is, as shown in FIG. 4, the first carriage 20 is located on the inner peripheral side In of the guide rail 100, and the second carriage 30 is located on the outer peripheral side Out of the guide rail 100. Therefore, when the mover 1 travels on the arc portion of the guide rail 100, the fastening bolt 27, the high nut 28, and the fastening bolt 37 have a rotational moment around the head of the fastening bolt 27 on the inner peripheral side In. Occurs. This rotational moment is received by the first bush 29 and the second bush 39. That is, the first bush 29 and the second bush 39 are support points for the force generated by the rotational moment. The longer the distance from the center of the rotational moment to the support point, the greater the force generated by the rotational moment. Therefore, by providing the first bush 29 relatively close to the center of the rotational moment, the force supported by the first bush 29 can be reduced. This means increasing the distance between the first bush 29 and the second bush 39, and the distance between the two support points in the second carriage 30, which moves relative to the first carriage 20.

[First roller 40]
The first roller 40 is fixed to the first carriage 20 by inserting the support shaft 41 into the shaft hole 25 of the first carriage 20 and fastening the nut 43 to the support shaft 41. A V-shaped groove is formed on the outer circumference of the first roller 40. As shown in FIG. 1, the V-shaped groove 40V rolls while meshing with the V-shaped first guide surface 101 of the guide rail 100 without a gap. The meshing of the V-shaped groove 40V and the V-shaped first guide surface 101 in this way realizes the support of the horizontal direction H and the vertical direction V to the first guide surface 101 by one first roller 40. Because.
For example, a radial bearing is interposed between the first roller 40 and the support shaft 41, and the first roller 40 is rotatably supported by the support shaft 41 with low friction.
In the present embodiment, a pair, that is, two first rollers 40 are used, but this indicates the minimum number, and three or more first rollers 40 may be provided. The same applies to the second roller 50.

[Second roller 50]
The second roller 50 is fixed to the second carriage 30 by inserting the support shaft 51 into the shaft hole 35 of the second carriage 30 and fastening the nut 53 to the support shaft 51. A V-shaped groove is formed on the outer circumference of the second roller 50. As shown in FIG. 1, the V-shaped groove 50V rolls while meshing with the V-shaped second guide surface 103 of the guide rail 100 without a gap.
For example, a radial bearing is interposed between the second roller 50 and the support shaft 51, and the second roller 50 is rotatably supported by the support shaft 51 with low friction.

The mover 1 of the present embodiment includes a pair of first rollers 40 and a pair of second rollers 50. As a result, the posture of the mover 1 with respect to the guide rail 100 can be properly maintained.

[Relationship between the first roller 40 and the second roller 50]
As shown in FIG. 2, assuming that the diameter of the first roller 40 is D40 and the diameter of the second roller 50 is D50, the relationship of D40 <D50 is established between D40 and D50. Further, as shown in FIG. 2, if the distance between the axes of the first rollers 40 and 40 arranged in the width direction W is d40 and the distance between the axes of the second rollers 50 and 50 is d50, there is a relationship of d40 <d50. doing. This is because the guide rail 100 includes an arc-shaped portion in a plan view, and it is assumed that the mover 1 travels on this arc-shaped portion. That is, in the arc-shaped guide rail 100, the arc of the second guide surface 103 on the outer peripheral side Out is longer than the arc of the first guide surface 101 on the inner peripheral side In even if the central angle is the same. Moreover, the first carriage 20 includes a pair of first rollers 40 spaced apart in the width direction W, and the second carriage 30 includes a pair of second rollers 50 spaced apart in the width direction W. In order to correspond to this, the relationship of D40 <D50 and d40 <d50 is provided between the first roller 40 and the second roller 50. The larger the diameter of the first roller 40 and the second roller 50, the larger the load capacity. Therefore, it is preferable to increase D40 within the range satisfying the relationship of D40 <D50 and d40 <d50.
The above suggests that in the case of the guide rail 100 consisting of only straight lines, it is sufficient to have the relationship of D40 = D50 and d40 = d50.

[Attachment / removal of mover 1 to guide rail 100]
To attach or remove the mover 1 to or remove the guide rail 100, the following may be performed.
First, before mounting, the first carriage 20 and the second carriage 30 are preliminarily assembled. Preliminary means that the screwing amount of the fastening bolt 37 with respect to the high nut 28 is small. Specifically, the distance between the tip of the first guide surface 101 of the guide rail 100 and the tip of the second guide surface 103 (see FIG. 1, width of the guide rail 100) is more than that of the first roller 40 and the second roller 50. The screwing amount of the fastening bolt 37 with respect to the high nut 28 is set so that the interval becomes wide. The distance between the first roller 40 and the second roller 50 is not the distance between the V-shaped groove 40V and the V-shaped groove 50V, but the distance between the outer peripheral portions excluding the V-shaped groove 40V and the V-shaped groove 50V.
In the state where the first carriage 20 and the second carriage 30 are preliminarily assembled, no load is generated on the disc spring 38.

The mover 1 to which the first carriage 20 and the second carriage 30 are preliminarily assembled is arranged so that the first roller 40 and the second roller 50 straddle the guide rail 100. Since the distance between the first roller 40 and the second roller 50 is wider than the width of the guide rail 100, the first roller 40 and the second roller 50 can easily straddle the guide rail 100. In this way, the V-shaped groove 40V is positioned with respect to the first guide surface 101, and the V-shaped groove 50V is positioned with respect to the second guide surface 103.

After positioning, the screwing amount of the fastening bolt 37 is increased to a predetermined value. FIG. 5A shows a state in which the fastening bolt 37 is screwed to a predetermined value, but a load acts on the two disc springs 38 in a direction in which the distance between the two disc springs 38 becomes narrower, and as a reaction thereof. A tensile tensile force is generated on the fastening bolt 37.
Here, the disc spring 38 is supported by the second carriage 30, the fastening bolt 27, the high nut 28 and the fastening bolt 37 are supported by the first carriage 20, and the disc spring 38 and the fastening bolt 37 are further engaged in the second carriage 30. Will be combined. An elastic force is applied to the first carriage 20 and the second carriage 30 in a direction relatively close to each other through the axial force of tension generated in the fastening bolt 37, and thus the first roller 40 and the second roller 50 are relative to each other. Elastic force is applied in the direction approaching.

The two disc springs 38 can be compressed to the flat state shown in FIG. 5 (b). This state means that the width of the guide rail 100 is relatively wide with respect to the distance between the first roller 40 and the second roller 50. The distance between the first roller 40 and the second roller 50 is the narrowest in FIG. 5A and the widest in FIG. 5B. However, in the state of FIG. 5B, since the distance between the first roller 40 and the second roller 50 cannot be further widened, the first carriage is prevented so that the disc spring 38 does not actually reach a flat state. It is preferable to assemble the 20 and the second carriage 30.

For example, during maintenance and inspection of the mover 1, the mover 1 is first removed from the guide rail 100 after reducing the screwing amount of the fastening bolt 37 until it is in a preliminary assembly state.

[Actions and effects of mover 1 and roller guide device 3]
The carriage 10 constituting the mover 1 of the present embodiment includes an interval adjusting mechanism having a disc spring 38 as an elastic body that applies an elastic force in a direction relatively close to the first carriage 20 and the second carriage 30. As a result, the first roller 40 supported by the first carriage 20 and the second roller 50 supported by the second carriage 30 are elastically pressed against the guide rail 100. Therefore, since accuracy is not required to attach the mover 1 to the guide rail 100, the mover 1 can be attached to the guide rail 100 in a short time even if the person is not an expert. Further, the mover 1 can be easily attached to the guide rail 100 even if the dimensional accuracy of the members themselves such as the first carriage 20 and the second carriage 30 is not high. Further, if the pressurization of the mover 1 is appropriately set in advance by the elastic body, the disc spring 38, the member may be damaged due to the excessive pressurization, or the first roller 40 and the second roller 50 may be operated for a long period of time. There is no need to reset the pressurization according to the wear of the.

The carriage 10 according to the present embodiment is composed of two members, a first carriage 20 and a second carriage 30. Therefore, the mover 1 can be moved to the guide rail by a simple operation of positioning the first carriage 20 and the second carriage 30 in the preliminary fastening state with respect to the guide rail 100 and then increasing the screwing amount of the fastening bolt 37. It can be attached to 100. This means that, for example, the burden of exchanging the bearings that support the first roller 40 and the second roller 50 can be reduced. In particular, when a large number of movers 1 such that more than 10 units are provided for the guide rail 100, the work load is significantly reduced.

The interval adjusting mechanism in the present embodiment includes a disc spring 38 supported by the second carriage 30 and an elastic force transmitter supported by the first carriage 20, and the disc spring 38 and the elastic force transmitter are engaged with each other. It consists of a simple configuration that is done. Here, the fastening bolt 27, the high nut 28, and the fastening bolt 37 constituting the elastic force transmitter are members that connect the first carriage 20 and the second carriage 30. Therefore, since it is sufficient for the mover 1 to add the disc spring 38, which is an elastic body, as an element for applying pressurization, the increase of members can be minimized. In particular, since the interval adjusting mechanism in the present embodiment uses the disc spring 38 for generating the elastic force, the size of the elastic body can be made smaller than that using the coil spring. However, in the present invention, this does not deny the use of a coil spring as an elastic body, and instead of the disc spring 38, an elastic body made of a coil spring, an elastic body made of tubular rubber, or the like is used. Tolerate.

In the present embodiment, the fastening bolt 27, the high nut 28, and the fastening bolt 37 as the elastic force transmitter are provided so as to penetrate the inside of the first carriage 20 and the second carriage 30. Therefore, the elastic force transmitter is protected by the first carriage 20 and the second carriage 30, and the elastic force transmitter can be prevented from interfering with the surroundings.

In the present embodiment, the high nut 28 as the elastic force transmitter is supported by the second carriage 30 via the first bush 29, and the fastening bolt 37 is supported by the second carriage 30 via the second bush 39. Carriage. Therefore, when the second carriage 30 is displaced relative to the first carriage 20, the position accuracy of the high nut 28 and the fastening bolt 37 with respect to the second carriage 30 while suppressing wear of the high nut 28 and the fastening bolt 37. Can be secured.

In the present embodiment, the disc spring 38 and the fastening bolt 37 that presses the disc spring 38 against the second carriage 30 are provided at the end of the outer peripheral side Out of the guide rail 100 of the carriage 10. As a result, when the mover 1 is attached to or detached from the guide rail 100, the operator of the roller guide device 3 does not move to the inner peripheral side In of the guide rail 100 and remains on the outer peripheral side Out of the guide rail 100. Then, the fastening bolt 37 can be operated.

In the present embodiment, the boundary between the first carriage 20 and the second carriage 30 is provided so as to be offset from the center of the length direction L in a direction away from the disc spring 38. This means increasing the distance between the first bush 29 and the second bush 39, and the distance between the two support points in the second carriage 30, which moves relative to the first carriage 20. As a result, the force due to the rotational moment applied to the first bush 29 can be reduced.

[Additional Notes]
Although the preferred embodiment of the present invention has been described above, the configurations listed in the above embodiments can be selected or replaced with other configurations as long as the gist of the present invention is not deviated.

For example, the spacing adjusting mechanism in the present embodiment enables the relative movement of the first carriage 20 and the second carriage 30 in the length direction L by interposing the disc spring 38, and enables the relative movement of the first roller 40 and the second carriage 40. The spacing between the rollers 50 is adjusted, but the spacing adjusting mechanism of the present invention is not limited to this. For example, if the fastening bolt 27, the high nut 28, and the fastening bolt 37 are made of elastic bodies that can be expanded and contracted, the relative length L of the first carriage 20 and the second carriage 30 is similar to that of the present embodiment. The distance between the first roller 40 and the second roller 50 can be adjusted. In addition, the present invention can also make the integrated carriage 10 support the distance between the first roller 40 and the second roller 50 in an adjustable manner. For example, by supporting the first roller 40 and the second roller 50 to the carriage 10 via an elastic body such as rubber, the distance between the first roller 40 and the second roller 50 can be adjusted by an elastic force.

In the interval adjusting mechanism in the present embodiment, the disc spring 38 is provided on the outer peripheral side Out of the guide rail 100, but the position of the elastic body in the present invention is not limited to this, and the inner peripheral side In of the guide rail 100 is not limited to this. An elastic body can be arranged on the first carriage 20 of the above. In this case, the first carriage 20 is provided with two bushes corresponding to the first bush 29 and the second bush 39 to support the force generated by the rotational moment. In order to increase the distance between the two bushes, the boundary between the first carriage 20 and the second carriage 30 is provided so as to be offset from the center of the length direction L toward the disc spring 38, in other words, the inner peripheral side In. There is a need.

Although omitted in the present embodiment, the roller guide device 3 may require a drive source for traveling the mover 1, but this drive source is arbitrary in the present invention. To give an example of a drive source, there are a linear motor provided between the carriage 10 and the mover 1, a chain drive device driven by an electric motor, and the like.

The first guide surface 101 and the second guide surface 103 of the guide rail 100 in the present embodiment have a V shape, and the first roller 40 and the second roller 50 have a V-shaped groove 40V and a V-shaped groove 50V, respectively. However, the guide surface and the groove shape of the roller in the present invention are arbitrary. For example, in the case of an arc shape, it is possible to simultaneously support the guide surface in the horizontal direction H and the vertical direction V with one roller as in the present embodiment. Further, for applications where it is sufficient to realize support in either the horizontal direction H or the vertical direction V, the first guide surface 101 and the second guide surface 103 are flat, and the first roller 40 and the second roller 50 are used. The outer peripheral surface of the above may also be flat.

1 Movable 3 Roller guide device 10 Carriage 20 1st carriage 21 Top surface 22 Bottom surface 23 1st side surface 24 2nd side surface 25 Shaft hole 26 Fastening hole 27 Fastening bolt 28 High nut 29 1st bush 30 2nd carriage 31 Top surface 32 Bottom surface 33 1st side surface 34 2nd side surface 35 Shaft hole 36 Fastening hole 37 Fastening bolt 39 2nd bush 40 1st roller 40V V-shaped groove 41 Support shaft 43 Nut 50 2nd roller 50V V-shaped groove 51 Support shaft 53 Nut 100 Guide Rail 101 1st guide surface 103 2nd guide surface

Claims (10)

Carriage having length direction and width direction orthogonal to each other,
A pair of first rollers supported by the carriage and
A pair of second rollers supported by the carriage at intervals in the length direction from the first roller,
An interval adjusting mechanism that adjusts the distance between the first roller and the second roller by an elastic force,
Movable with.
The carriage is
The first carriage that supports the first roller and
A second carriage that supports the second roller and
The mover according to claim 1, further comprising the interval adjusting mechanism having an elastic body that applies an elastic force in a direction relatively close to the first carriage and the second carriage.
The interval adjustment mechanism is
The elastic body supported by one of the first carriage and the second carriage,
An elastic force transmitter supported by the first carriage and the other of the second carriage.
The elastic body and the elastic force transmitter are engaged in one of the first carriage and the second carriage.
The movable element according to claim 2.
The elastic force transmitter is
It is provided so as to penetrate the inside of the first carriage and the second carriage.
The movable element according to claim 3.
The elastic force transmitter is
It is supported by one of the first carriage and the second carriage via a bush.
The movable element according to claim 4.
The elastic body is
Provided at one end of the carriage in the length direction.
The mover according to any one of claims 2 to 5.
The elastic body is made of a disc spring.
The mover according to any one of claims 2 to 6.
The boundary between the first carriage and the second carriage is provided so as to be offset from the center in the length direction in a direction away from the elastic body.
The mover according to claim 6 or 7.
The diameter of the first roller is D40, the diameter of the second roller is D50,
Assuming that the distance between the pair of the first rollers is d40 and the distance between the pair of the second rollers is d50, D40 <D50 and d40 <d50 hold.
The mover according to any one of claims 1 to 8.
Guide rails, each of which faces a first guide surface and a second guide surface,
It is equipped with a mover that travels while being guided by the guide rail.
The mover is
A pair of first rollers and a pair of second rollers that roll on each of the first guide surface and the second guide surface.
A carriage that straddles the guide rail and supports the first roller and the second roller,
An interval adjusting mechanism that applies an elastic force in a direction in which the first roller and the second roller are relatively close to each other,
Roller guide device equipped with.

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