JPH09196010A - Stop member fitting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism for fitting a stop member at a low height, which can receive a large horizontal moment to be applied to the stop member. SOLUTION: When a slide body 18 to be reciprocated by a rod-less cylinder unit 30 along a guide rail 10 abuts on a shock absorber 80, which is provided in a base side, at a stroke end, a horizontal moment is generated in a stop member fitting holder 70, but since a recessed groove (engaging groove) of the stop member fitting holder 70 is fitted in a cross directional side surface of the guide rail 10, this horizontal moment is practically received by the whole of the base 1, to which the guide rail 10 is fixed, and the guide rail can withstand a large horizontal moment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop member mounting mechanism used in a rodless cylinder with a guide.

[0002]

2. Description of the Related Art A guide rail and a rodless cylinder are arranged side by side in a base having a U-shaped cross section, and a moving body guided by the guide rail and an external moving body of the rodless cylinder are connected to each other, A stop member that restricts the stroke is fixed to the base by using a T groove (Shokai 62-6508),
A guide rail with an inverted trapezoidal cross section, which is arranged parallel to the rodless cylinder, is fitted with a pedestal with an inverted trapezoidal mounting groove to which a shock absorber is attached, in the width direction of the guide rail. What is fastened with screws (No. Sho 63-106907), which has the same structure as the above, but has a pair of left and right guide rails, and clamps that straddle each guide rail are fastened to the guide rails with set screws. Things (Shokai 61-14130)
Etc. are known.

[0003]

In the above, since the stop member is fixed to the base using only the T groove,
Although the position adjustment in the longitudinal direction is easy, there is a problem that the stop member is likely to loosen due to the repeated shocks applied to the stop member. In addition, on the guide surface of the guide rail that slides and guides the slide table,
Since the pedestal and clamp are firmly fastened to fix the shock absorber, if the pedestal and clamp are moved in the longitudinal direction and fastened to the desired position to adjust the stroke in the longitudinal direction, the guide surface is damaged. There was a risk that the guide of the slide table would be adversely affected. Also, in, the shock absorber is located directly above the guide rail to prevent it from receiving a horizontal moment.
In this way, the structure in which the shock absorber is arranged on the guide rail requires a large space above the guide rail, and there is a problem that the height direction cannot be lowered. In this respect, since the stop member is arranged on the side of the guide rail, the height can be reduced. However, in the structure of, the stop member is separated from the T groove in the width direction (developed) to the slide body. When a collision occurs, a horizontal moment is generated, and the horizontal moment can be received only by one side surface of the guide rail. Therefore, there is a problem that a large horizontal moment cannot be received. An object of the present invention is a mounting structure using a guide rail, in which the height can be reduced without damaging the guide surface of the guide rail, and a large load is applied to a position deviated from the mounting portion. Another object of the present invention is to obtain a stop member mounting mechanism capable of reliably receiving the horizontal moment.

[0004]

In order to solve the above-mentioned problems,
In the present application, the horizontal moment due to the force received by the stop member provided at the position deviated from the guide rail so that the height can be lowered on the left and right widthwise surfaces of the guide rail integral with the base, which are not related to the guide surface, It was received so that it would essentially receive its horizontal moment by the base. In addition, the vertical moment that the stop member receives is
I made it possible to receive by increasing the length of the groove nut.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a guide rail is mounted on a base, a rodless cylinder is arranged along the guide rail, and an external moving body of the rodless cylinder and a slide body guided by the guide rail are provided. It is made by connecting,
A rod holder with a guide, in which a stop member mounting holder is provided so that its position can be adjusted in the direction along the guide rail, and the stop member mounting holder is provided with a stop member such as a shock absorber (shock absorber) that abuts the slide body. In the cylinder, the stop member mounting holder is formed with a fitting groove that fits on the left and right widthwise surfaces of the guide rail except for the guide surface. The stop member attachment holder is fixed to the base, and the stop member attachment holder is provided with the stop member attached at a position horizontally displaced from the guide rail. Accordingly, the horizontal moment generated by the stop member is substantially received by the base via the left and right surfaces in the width direction of the guide rail while keeping the holder in a low shape. The stop member may be a mere stroke adjusting stopper member having no cushioning function.

A T groove is formed on the side of the guide rail in the base along the guide rail, and the stop member mounting holder is fixed to the base by a T groove nut and a tightening bolt fitted in the T groove. If the groove nut has a shape having an extending portion on the inner side in the longitudinal direction with respect to the connecting portion with the tightening bolt, it becomes extremely strong against the vertical moment applied to the stop member.

The stop member mounting holder is specifically,
From a base portion having a fitting groove that fits with one guide rail, a shape that extends laterally is provided, and a stop member is provided at the tip portion thereof, and between the stop member and the base portion,
It is fixed to the base.

[0008] Specifically, the guide rail has a rectangular cross section, and is provided with recessed guide surfaces for guiding balls on the widthwise surfaces thereof. If the surface is a surface that fits into the fitting groove of the stop member mounting holder, the horizontal moment can be received by the surface orthogonal to this, so that a larger horizontal moment can be endured.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1, 2 and 3, a base 1 is a bottom wall 1a.
And a side wall 1b which is erected upward from the side end thereof, and has an L-shaped cross section. A shallow groove 2 for mounting the guide rail is provided on the upper surface of the bottom wall 1a over the entire length. On the top surface of the bottom of the groove 2, T
A groove 3 is provided. A T-shaped groove 4 for mounting the stop member mounting holder 75 is provided on the entire length of the base 1 on the side of the groove 2 opposite to the side wall 1b in the width direction. Side wall 1b of base 1
Near the side surface 1c on the side where there is no protrusion is a protruding portion 5 protruding upward, and this protruding portion 5 is provided with a through hole 6 which serves as a fluid passage over the entire length of the base 1. On the lower surface of the bottom wall 1a, T grooves 7 for attaching two linear actuators to the left and right,
7 is also provided over the entire length of the base 1. The base 1 is made of, for example, an extruded profile of aluminum alloy.

A guide rail 10 having a length slightly shorter than the entire length of the base 1 is arranged in the groove 2 of the base 1, and a mounting bolt 12 is passed through a plurality of screw holes 11 provided in the guide rail 10 in the longitudinal direction. The guide rail 10 is integrally fixed to the base 1 by being screwed into the T-groove nut 13 fitted in the T-shaped groove 3. The guide rail 10 has a guide groove 14 (here, a semicircle: V
(There are also character shapes, etc.), and a large number of balls 17 are rotatably interposed between the guide groove 14 and the ball groove 16 of the guide element 15, and the guide element 15 rolls linearly in the longitudinal direction. You are being guided. Two such guides 15 are provided on the guide rail 10.
Is being guided. These two guides 15 are connected to the lower surface of a slide table (slide body main body) 18. The number of guides 15 is not limited to the above.

Rectangular connecting plates 20 and 21 are fixed to the front and rear end faces of the base 1 in the axial direction by bolts 22, respectively. The connection plates 20 and 21 are the side walls 1 of the base 1.
It has a shape that extends further laterally than the side surface 1c on the side without b, and its height is the height of the barrel when the cylinder barrel 31 of the rodless cylinder unit 30 is laid sideways (in the width direction of the slit). The thickness is substantially the same as the barrel thickness H), and an accommodation space C for accommodating the rodless cylinder unit 30 is formed on the side of the side surface 1c of the base 1. A rodless cylinder unit (driving mechanism) 30 is arranged along the guide rail 10 between the connection plates 20 and 21.

In the rodless cylinder unit 30, the cylinder barrel 31 has a substantially rectangular cross section and has a slit 32 over the entire length in the longitudinal direction. Both ends of the cylinder barrel 31 are closed by end fitting members 33. 6 shows the right one, the pair of end fitting members 33 includes a fitting shaft portion 33a that fits into the cylinder hole 34 of the barrel 31,
A thin collar portion 33b for axial positioning, and a fitting portion 33c of the connecting plates 20 and 21 facing outward in the axial direction,
Left and right cylinder chambers S1, S2 partitioned by the piston 40
It is provided with a communication passage 33d that opens to the. End fitting member 3
3, the fitting shaft portion 33a is only fitted into the cylinder hole 34 so as to close the cylinder hole 34 by the seal member (O ring) 25 attached to the tip, and is not fixed to the barrel 31. As shown in FIG. 4, the flange portion 33b and the fitting shaft portion 33a are cut out at a portion corresponding to the slit to form an insertion plane (insertion portion) 33e of the inner seal band. To
The inner seal band can be easily moved in the longitudinal direction. The fitting shaft portion 33a of the end fitting member 33 is provided with two screw holes 35 for fixing the outer seal band in the axial direction at the center of the insertion plane 33e in the width direction. A groove 38 into which the head portion of the rivet 37 for fixing the washer 36 is fitted to the outside of both ends of the inner seal band 50 is provided inside the screw hole 35 in the insertion plane 33.
It is formed at the center of e in the width direction. This washer 36
As shown in FIG. 5, the inner seal band 50 is tightly fitted in the slit 32 to function so that the inner seal band 50 does not shift in the width direction with respect to the slit 32. These washers 36
Is not necessary for other types of seal bands, for example elastic seal bands having a lip that elastically fits in the slit 32.

A piston 40 as an internal moving body is fitted in the cylinder hole 34 so as to be movable in the axial direction. Piston packings 41 are attached to both axial ends of the piston 40, and the piston 40 divides the cylinder hole 34 into left and right cylinder chambers S1 and S2. Piston 4
A yoke 42 in which part of 0 protrudes from the slit 32 to the outside
The yoke 42 has a hole 42a and a pin 42b.
The mount 43 is connected via the and to form an external moving body (driving body) 44. End plates 45 are fixed to the front and rear of the mount 43, and scrapers 46 are attached to the end plates 45. The scrapers 46 are O-rings 4 for attaching scrapers that surround the entire circumference of the external moving body 44.
7 is held. An inner seal band 50 that closes the slit 32 from the inner side and an outer seal band 51 that closes the slit 32 from the outer side are guided by the upper and lower guide surfaces of the yoke 42 and penetrate the external moving body 44. The inner seal band 50 and the outer seal band 51 are thin flexible seal bands made of a magnetic metal material such as stainless chrome steel, and are attracted by a magnet strip 52 provided at the outer edge of the slit 32. . The inner and outer seal bands 50 and 51 are
Other types of flexible sealing bands, such as urethane rubber, nylon, chrome steel and rubber and other materials, the inner and outer sealing bands are elastically disengaged from each other,
Alternatively, the slits 32 may be elastically engaged and disengaged with each other to close the slits 32.

As shown in FIGS. 5 and 6, both ends of the inner seal band 50 and the outer seal band 51 are connected to the pair of end fitting members 33. At the end of the outer seal band 51, a mounting plate 53 is attached to the outer surface of the outer seal band 51 at the end of the slit 32, and a fixing screw 54 is passed from the outside of the mounting plate 53 through the slit 32 to the end fitting member. 33 fitting shaft portion 3
It is screwed into the screw hole 35 of 2a and is sandwiched and fixed to the barrel 31. At the end of the inner seal band 50, the rivet 37 of the inner seal band 50 is attached to the end fitting member 3.
3 in the groove 38, that is, the washer 3
With the 6 positioned at the end of the slit 32, the barrel 3
1. A set screw 55 is screwed into the mounting plate 53 fixed to 1, and the set screw 55 is passed through the slit 32,
Insertion plane 33e between the tip of the set screw 55 and the fitting shaft 33a
Holds between. The set screw 55 has a shape having a pointed portion 55a on the inner side of the front end, and when the force is fixed by pressing, the pointed portion 55a bites into the inner seal band 50, so that it can be fixed very strongly.

As shown in FIG. 6, the dimension between the outer end faces 33f of the flange portions 33b of the pair of end fitting members 33 of the rodless cylinder unit 30 (the rodless cylinder unit 3
The mounting dimension L1) of 0 is set to be slightly smaller than the internal dimension (mounting dimension L2) between the connection plates 20 and 21 for easy assembly. Then, the rodless cylinder unit 30 is laterally oriented so that the slit 32 faces the guide rail 10, and the fitting portions 33c of the fitting members 33 at both ends are fitted into the fitting holes 60 provided in the connection plates 20 and 21.
Are fitted to each other via a seal member (O ring) 61. On one of the connection plates (right side) 21, at a position facing the brim portion 33b of the end fitting member 33 facing each other,
A push screw 62 is provided, and the push screw 62 pushes the flange portion 33b of the one end fitting member 33 in the axial direction,
The flange 33b of the left end fitting member 33 is pressed against the left connection plate 20 together with the barrel 31, and in this state, the axial outer end surface 33f of the flange 33b pressed by the push screw 62 and the right side end 33f. A slight gap t is formed between the inner surface of the connection plate 21 and the inside. In this state, the left and right connection plates 21 and 22 and the longitudinal end surface of the cylinder barrel 31 are fixed by the fixing screw 63. In the left connection plate 20, pressure fluid supply / discharge ports 23a and 23b are provided at a position facing the left end of the through hole 6 and a position facing the communication passage 33d of the left end fitting member 33, respectively. Is provided. The right connection plate 21 is provided with a supply / discharge passage 24 that communicates with the right end of the through hole 6 and also communicates with the communication passage 33d of the right end fitting member 33. One (left) connection Centralized piping can be made only from the plate 20. Of course, each of the left and right connecting plates 20 and 21 may be provided with a supply / discharge port corresponding to the left and right cylinder chambers S1 and S2.

The slide table 18 includes the side wall 1 in the width direction.
It is connected to the guide 15 at a position closer to b. The slide table 18 overhangs in the width direction from the connecting portion with the guide 15 to above the external moving body 44 of the rodless cylinder unit 30, and does not vertically overlap with the cylinder barrel 31. In the portion overlapping the external moving body 44, the leg 70 is provided at a position sandwiching the axial front and rear of the external moving body 44.
Is projecting toward the base. The external moving body 44 is sandwiched between a pair of front and rear legs 70, and a rubber damper (cushioning member) 71 is interposed between the end plate 45 of the external moving body 44 and the legs 70. The movement of 44 is transmitted to the slide table 18. A stopper 72 having a longitudinal length shorter than that of the slide table 18 is fixed to the lower surface of the slide table 18 between the guide 15 and the leg 70. Stopper 72
The axial end surfaces of the slide table 18 are contact surfaces 73, 73 with a shock absorber, which will be described later. As is clear from the drawing, the end surfaces 18a of the slide table 18 are more contact surface 73, 73.
Has entered inside in the longitudinal direction.

Next, at the inner position of the connection plates 20 and 21, as shown in FIG. 4, a groove (fitting groove) 76 is provided at the end of the guide rail 10 at the base of the stop member mounting holder 75. Is fitted, and its tip end 77 is projected in the width direction toward the rodless cylinder unit 30,
Using the T-slot 4, a T-slot nut 78 and a tightening bolt 79 screwed into the T-slot nut 78 are fixed so as to be movable in the axial direction. The left and right surfaces of the groove 76 are substantially in close contact with the left and right peripheral surfaces (vertical surfaces) 10a, 10a of the guide rail 10 (the width direction surface portions of the guide rail that are not related to the guide groove 14). As shown in FIG. 2, the T-groove nut 78 has a shape having an extending portion 78b on the inner side in the longitudinal direction with respect to the connecting portion 78a with the tightening bolt 79. The tip of the holder for attaching the stop member 75 is divided into two parts, and the screw portion 81 formed on the outer periphery of the shock absorber 80 is screwed into the shock absorber 80, so that the shock absorber is displaced laterally from the guide rail 10. The position of the shock absorber 80 itself is axially adjustable with respect to the holder 75, and the shock absorber 80 is fixed to the holder 75 with a fixing screw 82 at a predetermined axial position. The shock absorber 80 axially faces the stopper 72 of the slide table 18 and is located axially inward of the axially outer end surfaces of the connection plates 20 and 21. This shock absorber 80
May not be used depending on the usage of the linear actuator. Reference numeral 85 is a mounting hole that vertically penetrates the connection plates 20 and 21, and reference numeral 86 is a mounting groove for an accessory member such as a switch provided in the side wall 1b.

As described above, the guide rail 10 has the base 1
Connection plates 20 and 21 extending laterally to the base are fixed to the end portion (here, the end surface) of the base 1, and the base bottom wall 1a and the rod are connected to the side of the base 1 between the connection plates 20 and 21. Since the slits 32 are arranged laterally toward the guide rails 10 by stacking them in the height direction with the pressureless cylinder unit 30, since the guide rails 10 are integrated with the base 1, the rigidity is maintained high, so that the connecting plate 20, Even when it is attached to a mechanical device by using the attachment holes 85 of 21, the guide of the slide table 18 is smoothly maintained and its usage is diversified as compared with the case where there is no base at all. 32 is sideways,
Since the external moving body 44 arranged outside the slit 32 is laterally oriented, it becomes a linear actuator having a small thickness, and it can be applied to a place where the vertical gap is narrow.

When the pressurized fluid (compressed air) is supplied and discharged from the supply / discharge ports 23a and 23b, the piston 40 moves from one stroke end to the other stroke end, whereby the external moving body 44 moves. Is moved so that the slide table 18 moves straight in a state of being guided by the guide rail 10. Slide table 18
Comes to the stroke end, the abutting surface 73 of the stopper 72 abuts the shock absorber 80, and the slide table 1
8. The stop shock is softened and stopped. Figure 1
In the shock absorber 80 on the right side of FIG. 1, an axial force acts on the base portion of the holder 75 at the time of collision, and a clockwise moment is applied to the base portion of the holder 75 in the horizontal direction by the axial force. Since the groove 76 is fitted in the left and right surfaces 10a, 10a of the long guide rail 10 which is firmly fixed to the base 1, its moment is substantially passed through the left and right surfaces 10a, 10b of the guide rail 10. The stop member mounting holder 75, which can be received by the entire base 1 and is easily loosened only by tightening only the tightening screw 79, can be held at a predetermined position without loosening for a long period of time, and the left and right vertical sides of the guide rail 10 that receive a moment can be held. The surfaces 10a, 10a are
Since the surface is unrelated to the guide groove 14, the guide of the guide 15 is not adversely affected even with such a configuration.
Similarly, due to the axial force, a moment in the direction in which the holder 75 is lifted from the base 1 is also generated in the stop member mounting holder 75, but since the T-groove nut 78 has the extending portion 78b, the moment is extended. It is securely received by the installation portion 78b, and the tightening bolt 79 is prevented from loosening due to the moment in that direction.

At the stroke end, the protruding portion of the shock absorber 80 goes under the slide table 18 and abuts against the abutting surface 73, so that the abutting surface is conventionally located on the end surface of the slide table 18. If the strokes are the same, this configuration shortens the total length of the linear actuator due to the length overlapped with the slide table 18 at the time of collision, and makes the entire linear actuator compact, and the total length of the linear actuator is the same. Then, according to this configuration, the stroke can be lengthened.

Next, for convenience of use, considering the case where the shock absorber 80 is removed from the above configuration, the rodless cylinder unit 30 has a stroke end between stroke ends in which its piston 40 abuts on both end fitting members 33. It will move back and forth. Then, at the stroke end, the piston thrust force always acts on the end fitting member 33, and the end fitting member 33 receives a force outward in the axial direction. End fitting member 3
3 is only fitted into the cylinder hole 34,
In particular, on the side where the push screw 62 is provided, although there is friction holding by the fixing screw 54 that holds the outer seal band 51, there is no holding force enough to overcome the thrust, and the seal bands 50 and 51 are pulled. Attempting to move outwardly in the axial direction by the distance t, but the thrust force is
Since it is received by the connection plate 21 via the push screw 62, it is possible to prevent excessive tension from being generated in the seal bands 50 and 51 as a result, and to prevent deformation and damage of the seal bands 50 and 51. obtain. Further, even if the shock absorber 80 is not removed, by supplying the pressurized fluid, the corresponding end fitting member 33 receives the thrust force in the axial direction by the fluid pressure.
Similarly to the case of removing the band, the thrust of the band can be received by the connecting plate 21 by the action of the push screw 62.
It is possible to prevent the generation of tension due to the thrust at 0,51.

In the present application, since the guide rail having a rectangular cross section is described, the horizontal moment is received by the two planes orthogonal to the guide rail, so that it is possible to endure a larger horizontal moment and the structure is preferable, but of course, the trapezoid of the downward spread Shaped guide rails with concave-shaped ball guide surfaces on the left and right sides (Actual No. Sho 62-8170)
No. 2), or the slide body may be slid and guided with respect to the guide surface of the guide rail. It suffices if the widthwise surface is a surface that receives a horizontal moment.

[0023]

As described above, according to the present invention, since the stop member mounting holder is provided with the stop member at the position deviated laterally from the guide rail, the stop member is not arranged immediately above the guide rail, and the stop is stopped. The height of the entire holder including the members can be reduced. Even if the height can be reduced in this way, the stop member mounting holder is fixed to the base with its fitting groove fitted to the widthwise surface of the guide rail, and the guide rail is integrated with the base. Therefore, the horizontal moment when an impact load from the slide body is applied to the stop member can be received by the substantially rigid base via the left and right side surfaces of the guide rail, and it must withstand a large horizontal moment. You can In addition, since the width direction surface of the guide rail uses a portion that is not the guide surface of the guide rail, even if the stop member mounting holder is moved in the axial direction to change the stroke of the slide body, the guide rail guide It is possible to keep the slide body moving smoothly without damaging the surface.

Further, if the stop member mounting holder is fixed to the inside of the longitudinal direction by using the T groove with a long T groove nut, it is extremely strong against the moment in the vertical direction, and the stop member can be positioned and fixed more firmly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a linear actuator having the structure of the present application.

FIG. 2 is a plan view of a linear actuator.

FIG. 3 is an enlarged cross-sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

5 is a VV view (reduced view) of FIG. 4. FIG.

FIG. 6 is a detailed view of a band attaching portion.

[Explanation of symbols]

 1 base 4 T groove 10 guide rail 10a width direction surface 14 guide surface 17 ball 18 slide table 20, 21 connection plate 30 rodless cylinder unit 40 piston 44 external moving body 73 abutting surface 75 stop member mounting holder 76 fitting groove 77 Tip part 78 T-slot nut 78a Coupling part 78b Extended part 79 Tightening bolt 80 Shock absorber

Claims (5)

[Claims] 1. A guide rail is mounted on a base, and a rodless cylinder is arranged along the guide rail,
An external moving body of the rodless cylinder is connected to a slide body guided by a guide rail, and a stop member mounting holder is provided so that the position can be adjusted in the direction along the guide rail. In a rodless cylinder with a guide that includes a stop member that abuts against the stop member mounting holder, a fitting groove that fits in the left and right widthwise surfaces of the guide rail excluding the guide surface is formed. The stop member mounting holder is fixed to the base in a state of being fitted to the width direction surface of the guide rail, and the stop member mounting holder is mounted with the stop member at a position horizontally displaced from the guide rail. Stop member mounting mechanism. 2. A T-groove is formed on a side of the guide rail in the base along the guide rail, and the stop member mounting holder is fixed to the base with a T-groove nut fitted into the T-groove and a tightening bolt. The attachment mechanism for a stop member according to claim 1, wherein the T-groove nut has a shape having an extending portion on the inner side in the longitudinal direction with respect to the connecting portion with the tightening bolt. 3. A stop member mounting holder has a shape that extends laterally from a base portion having a fitting groove that fits with one guide rail, and the stop member is provided at the tip end portion thereof, and the stop member is also provided. The attachment mechanism for a stop member according to claim 1 or 2, wherein the attachment mechanism is fixed to the base between the base and the base. 4. The guide rail has a rectangular cross section, and a guide surface having a recessed shape for guiding balls is provided on a widthwise surface of the guide rail. Attachment mechanism of the stop member described in the above. 5. The stop member mounting mechanism according to claim 1, wherein the stop member is a shock absorber.