JP2970515B2 - Stop member mounting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A guide rail and a rodless cylinder are juxtaposed in a base having a U-shaped cross section, and a movable body guided by the guide rail is connected to an external movable body of the rodless cylinder. A stop member that regulates a stroke is fixed to a base using a T-slot (Japanese Utility Model Laid-Open No. 62-6508).
A cross-section arranged parallel to the rodless cylinder has an inverted trapezoidal guide rail, a pedestal having an inverted trapezoidal mounting groove to which a shock absorber is attached is fitted to the guide rail, and the width of the guide rail is changed. It is fastened by screws (Japanese Utility Model Application Laid-Open No. 63-106907), but has the same configuration as above, but has a pair of left and right guide rails, and clamps that straddle each guide rail are fastened to the guide rail by set screws. Thing (Japanese Utility Model No. 61-14030)
Etc. are known.

[0003]

In the above, since the stop member is fixed to the base using only the T groove,
Adjustment of the position in the longitudinal direction is easy, but there is a problem that the stop member is easily loosened due to repeated application of a shock at the time of abutment to the stop member. Also, in the guide surface of the guide rail that slides the slide table,
Since the pedestal and the clamp are firmly fastened and the shock absorber is fixed, when the pedestal and the clamp are moved in the longitudinal direction and fastened to a desired position to adjust the stroke in the longitudinal direction, the guide surface is thereby damaged. And the guide of the slide table may be adversely affected. Also, in, the shock absorber is located just above the guide rail and it is difficult to receive a horizontal moment,
Such a configuration in which the shock absorber is arranged on the guide rail requires a large space above the guide rail, and has a problem that the height direction cannot be reduced. In this respect, since the stop member is disposed on the side of the guide rail, the height can be reduced. However, in the structure described above, the stop member and the slide body are separated from each other in the width direction (displaced) from the T groove. When abutting, a horizontal moment is generated, and the horizontal moment can be received only on one side of the guide rail, so that a large horizontal moment cannot be received. It is an object of the present invention to provide a mounting structure using a guide rail. The height can be reduced without damaging the guide surface of the guide rail, and a large load is applied to a position shifted from the mounting portion. Another object of the present invention is to provide a mechanism for mounting a stop member capable of reliably receiving the horizontal moment.

[0004]

In order to solve the above-mentioned problems,
In the present application, the guide rail integrated with the base, on the left and right width direction surfaces unrelated to the guide surface, the horizontal moment due to the force received by the stop member provided at a position offset from the guide rail so that the height can be reduced. Once received, the horizontal moment was substantially received by the base. Further, the vertical moment received by the stop member is represented by T
The length of the groove nut has been increased so that it can be received.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, a guide rail is mounted on a base, a rodless cylinder is disposed along the guide rail, and an external moving body of the rodless cylinder and a slide body guided by the guide rail are provided. Concatenation,
A rodless guide with a guide provided with a stop member mounting holder so that the 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 (buffer) that comes into contact with a slide body. In the cylinder, the stop member mounting holder is formed with a fitting groove that fits in the left and right width direction surfaces excluding the guide surface of the guide rail, and the fitting groove is fitted in the width direction surface of the guide rail. The stop member attaching holder is fixed to the base, and the stop member is attached to the stop member attaching holder at a position deviated in the horizontal direction from the guide rail. Thus, the horizontal moment generated by the stop member is received substantially at the base via the left and right surfaces in the width direction of the guide rail while the holder is kept in a low shape. The stop member may be a simple stopper member for stroke adjustment without a buffer function.

A T-groove is formed in the base along the guide rail on the side of the guide rail, and the stop member mounting holder is fixed to the base with a T-groove nut and a tightening bolt fitted in the T-groove. If the groove nut is formed to have a portion extending inward in the longitudinal direction from the connection portion with the fastening bolt, the groove nut is extremely resistant to the vertical moment applied to the stop member.

[0007] Specifically, the stop member mounting holder includes:
From the base having a fitting groove to be fitted with one guide rail, it has a shape extending laterally, a stop member is provided at the distal end thereof, and between the stop member and the base,
It is fixed to the base.

Specifically, the guide rail has a rectangular cross-section, and has a concave guide surface on which a ball is guided on its width direction surface, and a vertical surface excluding the width direction guide surface. If the surface is a surface that fits into the fitting groove of the stop member mounting holder, a horizontal moment is received by a surface orthogonal to the surface, so that a larger horizontal moment can be endured.

[0009]

1, 2 and 3, a base 1 has a bottom wall 1a.
And a side wall 1b rising upward from the side end thereof. On the upper surface of the bottom wall 1a, a shallow groove 2 for mounting a guide rail is provided over the entire longitudinal length. On the bottom upper surface of the groove 2, T
A groove 3 is provided. A T-shaped groove 4 for mounting a 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, a protruding portion 5 protruding upward is provided. The protruding portion 5 is provided with a through hole 6 serving 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 mounting two linear actuators on the left and right are provided.
7 is also provided over the entire length of the base 1. The base 1 is made of, for example, an extruded aluminum alloy.

A guide rail 10 having a length slightly shorter than the entire length of the base 1 is provided in the groove 2 of the base 1, and a mounting bolt 12 is inserted through a plurality of longitudinal screw holes 11 provided in the guide rail 10. The guide rail 10 is integrally fixed to the base 1 by being screwed into a T-groove nut 13 fitted in the T-shaped groove 3. The guide rail 10 has a guide groove 14 (here, semicircular: V
A number of balls 17 are rotatably interposed between the guide groove 14 and the ball groove 16 of the guide 15, and the guide 15 linearly rolls in the longitudinal direction. You are being guided. The guide rail 10 has two such guides 15.
One 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 the guides 15 is not limited to the above.

Rectangular connection plates 20 and 21 are fixed to the front and rear end surfaces of the base 1 in the axial direction by bolts 22, respectively. The connection plates 20 and 21 are connected to the side wall 1 of the base 1.
b has a shape extending further laterally than the side surface 1c on the side without b, the height of which is the height of the barrel when the cylinder barrel 31 of the rodless cylinder unit 30 is turned sideways (in the width direction of the slit). The housing space C for housing the rodless cylinder unit 30 is formed substantially at the side of the side surface 1c of the base 1 so as to substantially match the barrel thickness H). A rodless cylinder unit (drive mechanism) 30 is disposed between the connection plates 20 and 21 along the guide rail 10.

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. FIG. 6 shows the right-hand part, and a pair of end fitting members 33 includes a fitting shaft part 33 a fitted into the cylinder hole 34 of the barrel 31,
A thin collar portion 33b for axial positioning, a fitting portion 33c with the connection plates 20 and 21 facing outward in the axial direction,
Left and right cylinder chambers S1, S2 partitioned by piston 40
The communication passage 33d is opened to the outside. End fitting member 3
In 3, the fitting shaft 33 a is merely fitted in 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 portions corresponding to the slits to form an inner seal band insertion plane (insertion portion) 33e. When the inner seal band is assembled, 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 in the width direction of the insertion plane 33e. A groove 38 into which the head of a rivet 37 for fixing the washer 36 to the outer side of both ends of the inner seal band 50 is fitted inside the screw hole 35 in the longitudinal direction.
e is formed at the center in the width direction. This washer 36
As shown in FIG. 5, the inner seal band 50 fits tightly into the slit 32 and functions so as not to 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 resiliently fits into 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. A piston packing 41 is 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
The yoke 42 in which a part of the “0” protrudes outside from the slit 32.
The yoke 42 has a hole 42a and a pin 42b.
The mount 43 is connected to the external moving body (driving body) 44 through the above. An end plate 45 is fixed to the front and rear of the mount 43, and a scraper 46 is attached to the end plate 45. The scraper 46 is a scraper attaching O-ring 4 surrounding the entire periphery of the external moving body 44.
7 is held. An inner seal band 50 for closing the slit 32 from the inside and an outer seal band 51 for closing the slit 32 from the outside 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 on an outer edge of the slit 32. . The inner and outer seal bands 50 and 51 are
Other types of flexible seal bands, for example, made of materials such as urethane rubber, nylon, chrome steel and rubber, the inner and outer seal bands are elastically disengaged from each other,
Alternatively, it may be of a type in which each is elastically engaged with and disengaged from the slit 32 to close the slit 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, at the end of the slit 32, a mounting plate 53 is applied to the outer surface of the outer seal band 51, and a fixing screw 54 is inserted from outside the mounting plate 53 through the slit 32 to the end fitting member. 33 fitting shaft part 3
It is screwed into the screw hole 35 of 2a and is clamped and fixed between the barrel 31. The end of the inner seal band 50 is connected to the rivet 37 of the inner seal band 50 by the end fitting member 3.
3, ie, the washer 3
6 with the barrel 3 positioned at the end of the slit 32,
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.
Inserting plane 33e between the tip of set screw 55 and fitting shaft 33a
And sandwiched between. The set screw 55 has a shape having a pointed portion 55a on the inner side of the tip. When the set screw 55 is pressed and fixed, the pointed portion 55a bites into the inner seal band 50, so that it can be fixed extremely strongly.

As shown in FIG. 6, the dimension between the outer end faces 33f of the flanges 33b of the pair of end fitting members 33 of the rodless cylinder unit 30 (the rodless cylinder unit 3).
The attachment dimension L1) is set slightly smaller than the inner dimension between the connection plates 20 and 21 (the attachment dimension L2) for easy assembly. The rodless cylinder unit 30 is turned sideways so that the slit 32 faces the guide rail 10, and the fitting portions 33 c of the both-end fitting members 33 are fitted with fitting holes 60 provided in the connection plates 20 and 21.
Is fitted through a seal member (O-ring) 61. On one connecting plate (right side) 21, a position facing the flange portion 33 b of the facing end fitting member 33 is provided.
A push screw 62 is provided, and the push screw 62 presses the collar 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. In this state, the axial outer end face 33f of the flange 33b pressed by the push screw 62 and the right side A slight gap t is formed between the connection plate 21 and the inner surface. In this state, the left and right connection plates 21 and 22 and the longitudinal end surface of the cylinder barrel 31 are fixed with fixing screws 63. The left connection plate 20 has a pressure fluid supply / discharge port 23a, 23b 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 communicates with the communication passage 33d of the right end fitting member 33. Centralized piping only from the plate 20 can be formed. Of course, supply / discharge ports corresponding to the left and right cylinder chambers S1, S2 may be provided in the left and right connection plates 20, 21, respectively.

The slide table 18 is provided on 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 a connection portion with the guide 15 to a position above the external moving body 44 of the rodless cylinder unit 30, and does not vertically overlap the cylinder barrel 31. In the portion overlapping with the external moving body 44, the legs 70 are located at positions sandwiching the front and rear of the external moving body 44 in the axial direction.
Is projected in the base direction. The external moving body 44 is sandwiched between the pair of front and rear legs 70, and a rubber damper (buffer member) 71 is interposed between the end plate 45 and the leg 70 of the external moving body 44, The movement of 44 is transmitted to the slide table 18. A stopper 72 whose longitudinal length is shorter than the longitudinal length 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
Are formed as contact surfaces 73, 73 with a shock absorber to be described later. As is apparent from the drawing, the contact surfaces 73, 73 are shifted from the end surface 18a of the slide table 18.
Penetrates the inside in the longitudinal direction.

Next, at a position inside the connection plates 20 and 21, as shown in FIG. 4, a concave groove (fitting groove) 76 provided at the end of the guide rail 10 at the base of the stop member mounting holder 75. Are fitted, and the distal end portion 77 is projected in the width direction toward the rodless cylinder unit 30,
Utilizing the T-slot 4, the nut is movably secured in the axial direction by a T-slot nut 78 and a fastening bolt 79 screwed with the T-slot nut 78. The left and right surfaces of the concave groove 76 are almost in close contact with the left and right peripheral surfaces (vertical surfaces) 10a, 10a (widthwise surface portions of the guide rail not related to the guide grooves 14) of the guide rail 10. As shown in FIG. 2, the T-slot nut 78 has a shape having an extended portion 78 b on the inside in the longitudinal direction from a coupling portion 78 a with the fastening bolt 79. The tip of the holder 75 for attaching the stop member is divided into two parts, and the screw part 81 formed on the outer periphery of the shock absorber 80 is screwed into the shock absorber 80 at a position shifted laterally from the guide rail 10. The position itself of the shock absorber 80 can be adjusted in the axial direction on 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 is opposed to the stopper 72 of the slide table 18 in the axial direction, and is located axially inward from 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 denotes a mounting hole vertically passing through the connection plates 20 and 21, and reference numeral 86 denotes a mounting groove provided on the side wall 1b for mounting an auxiliary member such as a switch.

As described above, the guide rail 10 is connected to the base 1.
And connecting plates 20 and 21 extending laterally to the end of the base 1 (here, end surfaces). A base bottom wall 1a and a rod are provided between the connecting plates 20 and 21 on the sides of the base 1. Since the slits 32 are arranged sideways facing the guide rails 10 with the less cylinder unit 30 overlapping in the height direction, the guide rails 10 are integrated with the base 1 so that the rigidity is maintained high. Even in the case where the slide table 18 is attached to a mechanical device using the attachment holes 85 of 21, the guide of the slide table 18 is kept smoother and the use mode is diversified, and the slit 32 is sideways,
Since the external moving body 44 disposed outside the slit 32 is oriented sideways, the external moving body 44 becomes a thin linear actuator, and can be applied to an installation location with a small vertical space.

When the pressurized fluid (compressed air) is supplied / discharged from the supply / discharge ports 23a and 23b, the piston 40 moves from one stroke end to the other stroke end. Is moved, and the slide table 18 accurately moves straight ahead while being guided by the guide rail 10. Slide table 18
Comes to the stroke end, the contact surface 73 of the stopper 72 contacts the shock absorber 80, and the slide table 1
8 stops after the stop shock is alleviated. For example, FIG.
In the shock absorber 80 on the right side of the figure, at the time of abutment, an axial force acts to apply a clockwise moment to the base of the holder 75 in the horizontal direction due to the axial force. Since the groove 76 is fitted into the left and right surfaces 10a, 10a of the long guide rail 10 which is firmly fixed to the base 1, the moment is substantially transmitted 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 with the tightening screw 79 alone, can be held at a predetermined position without loosening for a long period of time. Surfaces 10a, 10a
Since the surface is irrelevant to the guide groove 14, such a configuration does not adversely affect the guidance of the guide element 15.
Similarly, a moment in the direction of lifting the holder 75 from the base 1 is generated in the stop member mounting holder 75 by the axial force. However, since the T-slot nut 78 has the extending portion 78b, the moment is extended. The receiving portion is securely received by the installation portion 78b, and the loosening of the fastening bolt 79 due to the moment in that direction is also prevented.

At the stroke end, the projecting portion of the shock absorber 80 penetrates under the slide table 18 and makes contact with the contact surface 73, so that the contact surface is conventionally compared with the end surface of the slide table 18. If the stroke is the same, this configuration can shorten the overall length of the linear actuator and reduce the overall length of the linear actuator by an amount corresponding to the overlap at the time of abutment with the slide table 18, and the linear actuator has the same overall length. According to this configuration, the stroke can be lengthened.

Next, considering the case where the shock absorber 80 is removed from the above configuration for convenience of use, the rodless cylinder unit 30 is provided between the stroke ends where the piston 40 abuts against both end fitting members 33. Will reciprocate. Then, at the stroke end, a piston thrust 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 in 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, 51 are pulled. To move outward by the gap t toward the outside in the axial direction.
Since it is received by the connection plate 21 via the push screw 62, as a result, it is possible to prevent the seal bands 50, 51 from generating excessive tension due to such thrust, and to prevent deformation and breakage of the seal bands 50, 51. obtain. Further, even if the shock absorber 80 is not removed, the corresponding end fitting member 33 receives the thrust in the axial direction by the fluid pressure by supplying the pressurized fluid.
As in the case of removing the band 5, the thrust can be received by the connection plate 21 by the action of the set screw 62.
At 0,51, the generation of tension due to the thrust can be prevented.

In the present application, the guide rail having a rectangular cross section has been described, so that the horizontal moment is received on two surfaces orthogonal to the guide rail, so that it can endure a larger horizontal moment and is a preferable structure. A guide rail having a shape in which a concave-shaped ball guide surface is provided on the left and right surfaces (see Japanese Utility Model Application Laid-Open No. 62-8170).
No. 2), or may be such that the slide body is slidably guided on the guide surface of the guide rail. What is necessary is just to make a width direction surface into the surface which receives a horizontal moment.

[0023]

As described above, according to the present invention, the stop member is provided on the stop member mounting holder at a position deviated laterally from the guide rail. 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 the fitting groove fitted in the width direction surface of the guide rail, and the guide rail is integrated with the base. Therefore, the horizontal moment when the abutment load by the slide body is applied to the stop member can be received by the substantially rigid base through the left and right side surfaces of the guide rail, and can withstand a large horizontal moment. Can be. In addition, since the guide rail width direction surface uses a part that is not the guide rail guide surface, 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 is provided. The surface of the slide can be smoothly moved without damaging the surface.

Further, if the stop member mounting holder is fixed using a T-slot with a long T-slot nut on the inner side in the longitudinal direction, the stop member can be more firmly positioned and fixed because the moment in the vertical direction is extremely strong.

[Brief description of the drawings]

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

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

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

FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. 2;

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

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

[Explanation of symbols]

 Reference Signs List 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 contact surface 75 stop member mounting holder 76 fitting groove 77 Tip part 78 T-slot nut 78a Joint part 78b Extension part 79 Tightening bolt 80 Shock absorber

Claims (5)

(57) [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 and a slide body guided by the guide rail are connected to each other, and a stop member mounting holder is provided so as to be position-adjustable in a direction along the guide rail. In the guideless rodless cylinder having a stop member that abuts with the guide rail, the stop member mounting holder is formed with a fitting groove that fits in left and right widthwise surfaces excluding the guide surface of the guide rail. The stop member mounting holder is fixed to the base in a state in which the stop member is fitted to the width direction surface of the guide rail, and the stop member is mounted on the stop member mounting holder at a position deviated in the horizontal direction from the guide rail. And a stop member mounting mechanism. 2. A T-groove is formed in the base along the guide rail on the side of the guide rail, and the stop member mounting holder is fixed to the base with a T-groove nut and a tightening bolt fitted into the T-groove, The stop member mounting mechanism according to claim 1, wherein the T-groove nut has a shape extending inward in the longitudinal direction from a connection portion with the fastening bolt. 3. A stop member mounting holder having a shape extending laterally from a base having a fitting groove fitted with one guide rail, a stop member is provided at a tip end thereof, and the stop member is provided. 3. The stop member mounting mechanism according to claim 1, wherein the stop member is fixed to the base between the base and the base. 4. The guide rail according to claim 1, wherein the guide rail has a rectangular cross section, and a concave guide surface for guiding a ball is provided on a width direction surface of the guide rail. An attachment mechanism for the stop member according to the above description. 5. The stop member mounting mechanism according to claim 1, wherein the stop member is a shock absorber.