JP2022152776A - Temporary shaft of linear motion guide device - Google Patents

Abstract

To provide a temporary shaft of a linear motion guide device which can secure rigidity at coupling while preventing a fall of rolling bodies, and can be employed to an elongated slider.SOLUTION: A temporary shaft 30 of a linear motion guide device comprises: two or more temporary shaft members 40, 40 in which fitting recesses 42 recessed respectively from one or both end faces in a longitudinal direction, and first penetration slits 43 penetrating the fitting recesses 42, and extending in a vertical direction are formed; one or more connecting members 50 arranged respectively in the fitting recesses 42, 42 of the neighboring temporary members 40, 40, and having two continuous second penetration slits 51, 51 continuous to the first penetration slits 43, 43 of the temporary shaft members 40, 40 in a state of being arranged in the fitting recesses 42, 42, and; and two or more coupling members 60, 60 inserted into the first penetration slits 43 of the temporary shaft members 40 and the second penetration slits 51 of the connecting members 50.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a temporary shaft for a linear motion guide.

As shown in FIG. 4, a general linear motion guide device 100 includes a guide rail 110 having axially extending rolling element rolling grooves 111 on its outer surface, and guide rails 110 extending in the longitudinal direction of the guide rail 110 . and a slider 120 that is fitted so as to be relatively movable. A rolling element rolling groove (not shown) facing the rolling element rolling groove 111 is formed in the slider 120 along the axial direction. A plurality of rolling elements (not shown) loaded between the opposing rolling grooves are configured to advance while rolling. When this rolling element reaches one end of the main body of slider 120, it is scooped up by the end face of end cap 130, passes through a return guide (not shown) provided inside end cap 130, and moves to the main body of slider 120. It is led to a circulation hole formed inside. When the rolling elements pass through the circulation holes to reach the other end of the main body of the slider 120, they pass through the return guide provided in the end cap 130 on the opposite side, and the guide rail 110 and the main body of the slider 120 move toward each other. The rolling element is returned to the rolling groove toward which the rolling element can perform endless circulation.

In the linear guide device 100 configured in this way, when it is attached to a machine tool, a robot, or the like, dirt and dust accumulate on the rolling grooves of the rolling elements of the guide rail 110 and other exposed surfaces, causing the rolling elements to become damaged. Since the rolling of the end cap 130 is impeded, a side seal 140 for dust protection is usually attached to the end cap 130 .

Further, when the slider 120 is mounted on the guide rail 110, in order to prevent the rolling elements loaded on the slider 120 from falling out of the rolling grooves of the rolling elements, a resin molded like the guide rail 110 is provided. A slider 120 is held on the temporary shaft 150 . FIG. 5 is a diagram showing the configuration of a temporary shaft of the linear motion guide device described in Patent Document 1, and describes that a plurality of temporary shafts 150 are connected so that it can be applied to a long slider. It is

In particular, the provisional shaft 150 described in Patent Document 1 has connecting means 160 on both axial end surfaces that are orthogonal to the axial direction and are in sliding contact with each other in a direction extending from the upper surface to the lower surface of the provisional shaft 150 to connect in the axial direction. . Specifically, the connecting means 160 is a dovetail groove 161 extending from the upper surface to the lower surface of the temporary shaft perpendicular to the axial direction, or a suction bar 162 having a shape that fits in the dovetail groove 161. The axial dimension of the protruding portion of 162 is made smaller than the diameter of the rolling element. As a result, in a state in which the temporary shaft 150 is connected to the guide rail 110 (a state in which the protruding portion of the suction bar 162 is in contact with the end surface of the guide rail 110), the connected temporary shaft 150 and the guide rail 110 are separated from each other. The gap that can occur between them is smaller than the diameter of the rolling elements. Therefore, when the slider 120 is moved from the temporary shaft 150 to the guide rail 110, the rolling elements provided on the slider 120 are prevented from being caught in the gap.

Japanese Patent No. 5807390

However, in the temporary shaft 150 of the linear motion guide device described in Patent Document 1, if the diameter of the rolling element is small, the shape of the connecting means 160 cannot be machined. difficult to secure. Further, when connecting, the connecting means 160 is slid in the vertical direction, but if a strong force is applied, there is a possibility that the rolling grooves and the like will be displaced. If the rolling groove is displaced while the slider 120 is inserted, the slider 120 cannot be moved, and the rolling elements may fall off.

The present invention has been made in view of the circumstances described above, and its object is to prevent the rolling elements from falling off, and to ensure the strength at the time of connection, and is applicable to a long slider. To provide a temporary shaft for a linear guide device.

The above objects of the present invention can be achieved by the following configurations.
A temporary shaft for a linear motion guide device that temporarily holds the slider of the linear motion guide device comprising a guide rail and a slider that is relatively movable in the longitudinal direction of the guide rail via rolling elements with respect to the guide rail. hand,
at least two temporary shaft members each having a fitting recess recessed from at least one end surface in the longitudinal direction and a first through hole extending vertically through the fitting recess;
Two second through-holes are arranged in the fitting recesses of the adjacent temporary shaft members so as to be continuous with the first through holes of the temporary shaft members while being placed in the fitting recesses. at least one connecting member having a through hole;
at least two coupling members inserted into the first through hole of the temporary shaft member and the second through hole of the connecting member;
A temporary shaft of a linear motion guide.

According to the temporary shaft of the linear motion guide device of the present invention, at least two temporary shaft members, at least one connecting member, and at least two connecting members are used to prevent the rolling elements from falling off and to increase the strength at the time of connection. can be secured, and can be applied to a long slider.

FIG. 4 is a side view showing a state in which the temporary shaft of the linear motion guide device of the embodiment according to the present invention holds the slider; FIG. 4 is a cross-sectional view showing a state in which two temporary shaft members are connected; FIG. 4 is an exploded perspective view showing a temporary shaft member, a connecting member, and a coupling member; It is a perspective view explaining the structure of a linear guide. FIG. 10 is a front view showing a connection mode of two temporary shafts in a conventional linear guideway.

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a temporary shaft for a linear motion guide device according to the present invention will now be described in detail with reference to the drawings.
The temporary shaft 30 of the present embodiment is used when the slider 120 (see FIG. 1) assembled to the temporary shaft 30 is transferred from the temporary shaft 30 to the guide rail 110 when assembling the linear guide device 100 shown in FIG. is used for In this case, in the present embodiment, the plurality of temporary shaft members 40 are connected using a connecting member 50 and a connecting member 60, which are dedicated parts, so that the slider 120 having a long length can be accommodated. I'm trying to hold 120.
The same reference numerals as those of the linear motion guide device 100 shown in FIG. 4 are assigned to the configuration of the linear motion guide device to omit or simplify the description. .

That is, the temporary shaft 30 of this embodiment includes at least two (three in FIG. 1) temporary shaft members 40, 40, at least one (two in FIG. 1) connecting member 50, and at least two Two (four in FIG. 1) connecting members 60, 60 are provided.

The temporary shaft member 40 is made of resin or metal. have Both end surfaces of the temporary shaft member 40 are formed on planes orthogonal to the axial direction. Moreover, the plurality of temporary shaft members 40 are formed in the same shape. Therefore, the plurality of temporary shaft members 40 have the same axial length, and by combining the plurality of temporary shaft members 40 , the total length of the temporary shaft 30 may be slightly longer than the axial length of the slider 102 .
In the case of this embodiment, two rolling element raceway grooves 41, 41 extending in the axial direction are also formed on both side surfaces of the temporary shaft member 40 corresponding to the rolling element raceway grooves 111, 111 of the guide rail 110, respectively. formed.
In addition, the temporary shaft member 40 has fitting recesses 42 that are recessed in the longitudinal direction from both longitudinal end faces of the temporary shaft member 40 to partially accommodate the connecting members 50 , and vertical (vertical) ( A first through hole 43 extending in the lateral direction in FIG. 1) and into which the coupling member 60 is inserted is formed.

The fitting recess 42 formed in the temporary shaft member 40 is formed so as to match the shape of the connecting member 50 disposed inside. is formed in Further, the depth of the fitting recess 42 in the longitudinal direction of the connecting member 50 is adjusted so that a gap does not occur between the longitudinal end faces of the adjacent temporary shaft members 40, 40 when the longitudinal end faces of the temporary shaft members 40, 40 are butted against each other. It is designed to be 1/2 of its longitudinal length, or slightly larger. Furthermore, the vertical height of the fitting recess 42 is designed to be substantially the same as the vertical length of the connecting member 50 so that the adjacent temporary shaft members 40 , 40 are not relatively displaced in the vertical direction.
In the longitudinal direction of the temporary shaft member 40, a lightening portion 44 penetrating vertically is formed between the two first through holes 43 to reduce the weight of the temporary shaft member 40. As shown in FIG.

As described above, the connecting member 50 is arranged in each of the fitting recesses 42, 42 of the adjacent temporary shaft members 40, 40. As shown in FIG. Further, the connecting member 50 has two second through-holes that are continuous with the first through-holes 43 of the temporary shaft members 40, 40 while being arranged in the fitting recesses 42, 42. 51, 51. The through hole 51 vertically penetrates the connecting member 50 .

The first through-hole 43 of the temporary shaft members 40 and the second through-hole 51 of the connecting member 50 have a rectangular cross-section that matches the cross-sectional shape of the connecting member 60, and are formed to have substantially the same dimensions. there is Therefore, when the coupling member 60 is inserted into the first and second through-holes 43 and 51, it is fitted with the through-holes 43 and 51 and does not fall out of the first and second through-holes 43 and 51. is prevented.

The connecting member 60 is designed to have substantially the same height as the temporary shaft member 40 (the length substantially equal to the vertical length of the first through-hole 43), and is inserted into the first and second through-holes. At this time, the upper and lower end surfaces of the coupling member 60 are substantially flush with the upper and lower surfaces of the first through hole 43 . Thereby, the slider 120 does not interfere with the coupling member 60 when moving on the temporary shaft 30 .

Therefore, after the connecting member 50 is accommodated in the fitting recesses 42, 42 of the two temporary shaft members 40, 40, the first through hole 43 of each temporary shaft member 40, 40 and the second through hole of the connecting member 50 are inserted. By inserting and fitting the two coupling members 60, 60 into the holes 51, the two temporary shaft members 40, 40 are connected to each other without being separated in the longitudinal direction. By connecting the plurality of temporary shaft members 40, 40, 40 according to the length of the slider 120 in this manner, the rolling element raceway grooves 41, 41 of the respective temporary shaft members 40, 40 are not shifted. , the long slider 120 can be held while preventing the rolling elements in the slider 120 from coming off.

When separating the connected temporary shaft members 40, 40, the connecting member 60 is pushed through one of the upper or lower openings of the first through holes 43 of the temporary shaft members 40, 40, and the other opening is pushed. pull out from Thereby, the connecting member 50 can be separated from the fitting recess 42 of any one of the temporary shaft members 40 .

Further, as shown in FIG. 1 , the provisional shaft 30 has two restricting members 70 that have the same cross-sectional shape as the coupling member 60 but are longer than the coupling member 60 in the vertical direction. By inserting these two regulating members 70 into the first through holes 43 of the temporary shaft member 40 which are both ends of the temporary shaft 30 in the axial direction, they protrude from the upper surface of the temporary shaft member 40, thereby moving the slider 120. is regulated.

As described above, the temporary shaft 30 of the linear motion guide device of the present embodiment can connect a plurality of temporary shaft members 40 using the connecting member 50 and the coupling member 60, thereby preventing the rolling elements from falling off. In addition, the strength at the time of connection can be ensured, and the slider 120 having a long length can also be applied.
When the linear guide device 100 is assembled, no gap is generated between the guide rail 110 and the temporary shaft 30 when the temporary shaft 30 is connected to the guide rail 110 . Therefore, when the slider 120 assembled to the temporary shaft 30 is transferred from the temporary shaft 30 to the guide rail 110, the rolling elements can be prevented from falling off.

The present invention is not limited to the above embodiments and modifications, but can be modified and applied by those skilled in the art by combining each configuration of the embodiments with each other, based on the description of the specification and well-known technology. This is also contemplated by the present invention and included within the scope for which protection is sought.

For example, the provisional shaft member 40 of the present invention may have a configuration in which the fitting recess 42 and the first through hole 43 are formed only on at least one end face in the longitudinal direction. Even in this case, the two temporary shaft members 40 and 40 can be connected, and the temporary shaft 30 applicable to the long slider 120 can be configured.

As described above, this specification discloses the following matters.
(1) A temporary linear motion guide device that temporarily holds the slider of a linear motion guide device comprising a guide rail and a slider that is relatively movable in the longitudinal direction of the guide rail via rolling elements with respect to the guide rail an axis,
at least two temporary shaft members each having a fitting recess recessed from at least one end surface in the longitudinal direction and a first through hole extending vertically through the fitting recess;
Two second through-holes are arranged in the fitting recesses of the adjacent temporary shaft members so as to be continuous with the first through holes of the temporary shaft members while being placed in the fitting recesses. at least one connecting member having a through hole;
at least two coupling members inserted into the first through hole of the temporary shaft member and the second through hole of the connecting member;
A temporary shaft of a linear motion guide.
According to this configuration, by using at least two temporary shaft members, at least one connecting member, and at least two connecting members, it is possible to prevent the rolling elements from coming off and ensure the strength at the time of connection. can be applied to any slider.

(2) The provisional shaft for a linear motion guide device according to claim 1, wherein the fitting recess and the first through hole are formed on both longitudinal end surfaces of the provisional shaft member.
According to this configuration, any number of temporary shaft members can be connected, and it can be easily applied to a long slider.

(3) The apparatus according to any one of claims 1 and 2, further comprising two restricting members inserted into the first through holes of the temporary shaft member and projecting from the upper surface of the temporary shaft member to restrict movement of the slider. Temporary shaft for linear motion guide.
According to this configuration, the slider can be held while preventing the slider from falling off.

30 Temporary shaft 40 Temporary shaft member 42 Fitting recess 43 First through hole 50 Connecting member 60 Coupling member 70 Regulating member 100 Linear guide device 110 Guide rail 120 Slider

Claims (3)

A temporary shaft for a linear motion guide device that temporarily holds the slider of the linear motion guide device comprising a guide rail and a slider that is relatively movable in the longitudinal direction of the guide rail via rolling elements with respect to the guide rail. hand,
at least two temporary shaft members each having a fitting recess recessed from at least one end surface in the longitudinal direction and a first through hole extending vertically through the fitting recess;
Two second through-holes are arranged in the fitting recesses of the adjacent temporary shaft members so as to be continuous with the first through holes of the temporary shaft members while being placed in the fitting recesses. at least one connecting member having a through hole;
at least two coupling members inserted into the first through hole of the temporary shaft member and the second through hole of the connecting member;
A temporary shaft of a linear motion guide. 2. The provisional shaft of a linear motion guide device according to claim 1, wherein said fitting recess and said first through hole are formed on both longitudinal end surfaces of said provisional shaft member. 3. The linear motion device according to claim 1, further comprising two regulating members inserted into said first through-hole of said temporary shaft member and protruding from an upper surface of said temporary shaft member to regulate movement of said slider. Temporary shaft of the guide device.

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