JP2002322860A - Automatic hinged double door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hinged double door capable of automatically and simultaneously opening and closing both doors, and capable of pulling both doors in a fixed cover in an opening state. SOLUTION: The door L2 and the door R2 are respectively installed by hinges 7 on left and right support plates 5 movable on rails 4 arranged on the fixed cover 1. Respective one ends of rods L8 and R8 are pivotally joined to the doors L2 and R2. The other ends of the rods L8 and R8 are pivotally joined to a knuckle joint 12, and are connected to a piston rod 17 of a hydraulic cylinder device 16. A turnable sleeve body 24 and a round bar body 26 are fitted to and inserted into respective intermediate positions of the rods L8 and R8 so as to be capable of swiveling, and a lead cam groove 24b is formed in a sleeve of the sleeve body 24. A pin 28 is projected on the round bar body 26, and both are engaged. By regulating an included angle of the rods L8 and R8 in one cam groove direction changing part of the lead cam groove 24b when opening and closing the door L2 and the door R2 by reciprocally moving the knuckle joint 12 by the hydraulic cylinder device 16, both doors are held in an opening state, and can be pulled in the fixed cover 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double door which is used for a rectangular parallelepiped fixing cover of a machine tool, an industrial machine and the like, for example, a machining center, and is automatically opened and closed.

[0002]

2. Description of the Related Art In a machine tool, chips and cutting fluid are scattered in all directions during cutting of a workpiece. For this reason, the entire machine tool is usually covered with a fixed cover to prevent these scattering. A double door is often used as an opening / closing cover for attaching and detaching a work to and from a machine tool in order to make the opening large. Conventionally, as double doors that automatically open and close, doors that open and close the left and right doors one by one, and doors that open and close both at the same time are known.

[0003]

In the above-described prior art in which the left and right doors are opened and closed one by one, the left and right doors are automatically opened and closed in order to prevent the doors from being inadvertently closed. There has been a problem that a stopper mechanism for locking must be provided, and the mechanism is complicated and expensive. In the case of opening and closing both doors at the same time, both automatic opening and closing mechanisms and the stopper mechanism have to be interlocked, and there has been a problem that the mechanism is further complicated and expensive.

Further, in all of the above-mentioned prior arts, when the double door is opened, the door is projected forward from the fixed cover body covering the entire machine tool, which hinders the mounting and dismounting of the work and hinders the work. Had the problem of causing SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and has as its object to provide a double door that automatically operates both right and left doors simultaneously with a very simple mechanism. is there. Another object of the present invention is to provide a double door which allows both doors to be locked in an open state and furthermore to be able to be stored in a fixed cover when both doors are open.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, one end is respectively supported on one side of a cover which is an opening of a rectangular parallelepiped fixed cover, and is opened and closed. In the double door, two rods each having one end pivotally supported at an equal distance apart from the supporting position on each of the two double doors, and a knuckle joint pivotally connecting the other ends of the two rods. A guide plate provided with a guide groove for moving and guiding the knuckle joint in a direction perpendicular to the closed door attached to the fixed cover, and a driving device for moving the knuckle joint along the guide groove A guide rail attached to the guide plate direction inside the side cover of the fixed cover supporting the two doors, and a guide rail pivotally attached at the support position to the inside of the guide rail. It has a support plate provided, and a roller group provided on the support plate and capable of guiding and moving the support plate by engaging with the guide rail, wherein each door can be pulled into the inside of the fixed cover. is there.

According to the first aspect of the invention, one end of a rod is pivotally connected to each of the right and left doors, the other end of each rod is pivotally connected as a knuckle joint, and the knuckle joint is fluidized along the guide groove of the guide plate. Since it is moved by the pressure cylinder device, both left and right doors can be automatically opened and closed simultaneously in a stable state along the guide groove with a simple mechanism by pivotally connecting two rods using a knuckle joint It became.

In addition, guide rails are attached to the inner sides of both sides of the fixed cover, so that the support plates of the left and right doors, which are rotatably supported at one end, can be moved in the guide plate direction. The left and right doors can be housed inside the fixed cover, allowing work to be attached to the machine tool,
Both doors do not get in the way during removal.

According to a second aspect of the present invention, a sleeve body which can be swiveled in a horizontal direction at an intermediate position between one of the two rods can be swiveled in a horizontal direction at an intermediate position between the other rods. Provided is a round bar body fitted in the sleeve of the sleeve body movably in the axial direction, and one of the sleeve body and the round bar body is provided rotatably with respect to the axis thereof, One of the sleeve body or the round bar body is provided with a lead cam groove formed with a direction changing portion of a cam groove formed at two places around the circumference and shifted in phase by approximately 180 ° in the axial direction, and the other is formed in the lead cam groove. An engaging pin is provided, and the opening angle of the two rods is locked at one of the direction changing portions of the lead cam groove at the beginning of the process of closing the door, and the process proceeds to the process of opening the door. And said It provided part for restraining the pin so that the click is released, in which features a rod angle restricting mechanism so as to restrict the included angle of the two rods.

According to the second aspect of the present invention, the sleeve body is attached to one of the rods and the round bar body is attached to the other rod so as to be swivelable in the horizontal direction and one of the rods is pivotable about its axis. A round bar body is fitted so as to be movable in the axial direction, and a lead cam groove is provided on one of the sleeve body and the round bar body.
On the other hand, a pin that engages with this lead cam groove is provided to regulate the angle between the two rods, so that the open positions of both doors can be easily locked, and both doors can be opened. Now you can smoothly pull it into the fixed cover.

According to a third aspect of the present invention, the rod angle regulating mechanism includes a cam groove direction changing portion on a side of a door opening process end of the cam groove direction changing portion of the lead cam groove, which is used for the pin opening process of the pin. A first valley is provided on the outer cam groove wall which is an advancing end, and from the first valley, the pin is retracted in the axial direction by a predetermined amount at the beginning of the door closing step, and the inside of the inner lobe becomes a position for locking the opening angle of the rod. A second valley is provided in the cam groove wall, and it is possible to pivot between the first valley and the second valley. If the sleeve body is used, the sleeve body can be pivoted to the outer cam groove wall side along which the pin advances when the pin advances. In the case of a round bar body, an inclined surface for rotating the round bar body toward the outer cam groove wall along the retreat of the pin is provided continuously to the inner cam groove wall in front of the second valley, and the pin is provided in the second valley. After the pin is located, the pin is again advanced in the axial direction by a predetermined amount and the outer A third valley is provided on the outer cam groove wall at a position facing the entrance of the lead cam groove through which the pin moves when the pin retreats in the circumferential direction from the first valley of the groove wall, and the third valley is formed from the second valley to the third valley. If the pin is pivotable while reaching the sleeve body, the slanted surface is turned on the lead cam groove side where the pin passes when the pin advances, or if the pin is revolvable and the rod is a round bar, the round surface is turned on the lead cam groove side where the pin retreats. The pin is provided continuously to the outer cam groove wall in front of the third valley, and in the next door closing step, the pin located in the third valley moves toward the other cam groove direction changing portion via the lead cam groove which passes at the time of retreat. It is possible.

According to the third aspect of the present invention, the first valley is shifted on the outer cam groove wall of the cam groove direction changing portion, the second valley is shifted on the inner cam groove wall, and the phase is further shifted in the same direction. A third valley is provided on the outer cam groove wall, and an inclined surface is provided in front of the second valley, and an inclined surface of the same direction is provided in front of the third valley. The inclination direction is reversed depending on whether it is a sleeve body or a round bar body, the third valley is located at a position facing the entrance of the cam groove when the pin is retracted, and the third valley is moved from the first valley to the second valley and from the second valley to the third valley. Turn the sleeve or the round bar while moving to the third valley so that the third
The valley pin can enter the cam groove on the retreat side of the pin, so the door is opened by simply moving the pin forward and backward with a simple configuration without adding any special device, and the door is kept open and stored. And can be closed again.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing an opening / closing mechanism of an automatic double door according to the present invention, and shows a state in which two doors are closed. The rectangular parallelepiped fixed cover is indicated by a virtual line. A rectangular parallelepiped fixed cover 1 covering a machine tool (not shown) has an opening 1a on the front surface, and a pair of left and right doors L2 and R2 of the same size are provided side by side in this opening.

Inside the side surfaces 1b of the fixed cover 1, at least two guide rails 4 are provided horizontally vertically along the cover (in a direction perpendicular to the two closed doors L2 and R2). And is attached with a gap to the inside of the side surface 1b of the fixed cover 1. As shown in FIG. 2, the upper and lower two surfaces of each of the two rails 4 are all formed on a V-shaped guide surface 4a. The left and right support plates 5 are supported by rollers 6 rolling across the upper and lower guide surfaces 4a of the respective rails 4 and are provided movably along the rails 4. The door L2 and the door R2 are mounted on the left and right support plates 5 at two upper and lower positions by a hinge 7 which is a part to be supported by the door L2 and the door R2 so that they can be opened and closed horizontally. At this time, the frictional resistance by the hinge 7 is made smaller than the frictional resistance between the roller 6 and the rail 4, so that the door L2 and the door R2 can be opened and closed with a small force. If necessary, a brake pad is interposed between the support plate 5 and the rail 4.

One end of a rod L8 is pivotally connected to the upper end of the door L2 at a position at a fixed distance T from the hinge 7 so as to be pivotable in a horizontal plane. One end of a rod R8 is pivotally connected at the same distance T so as to be pivotable in a horizontal plane. Here, pivot means to be rotatably connected and attached. As shown in FIG. 3, the flat portions at the other ends of the rod L8 and the rod R8 are vertically inserted into the fork of the fork-shaped knuckle body 10, and the knuckle joint 12 is connected by the knuckle pin 11. Make up.

A guide plate 15 is horizontally attached to the center of the fixed cover 1 inside the top plate 1c. The main body 15a of the guide plate 15 has legs 15b projecting upward at both ends in the rail 4 direction. The legs 15b are attached to the inside of the top plate 1c of the fixed cover 1 by the feet 15b. An interval is provided between the upper surface. A guide groove 15c penetrating vertically is formed in the main body 15a of the guide plate 15.
Is provided extending parallel to the rail 4 to guide the movement of the knuckle joint 12. The length of the guide groove 15c is a length that regulates the moving distance of the knuckle pin 11 so as to determine both end positions of the closed state and the open state of the door L2 and the door R2. The guide groove 15c has a length corresponding to a moving distance of the pin 28 described later, but the guide groove 15c may be slightly longer.

The knuckle pin 11 has a shaft portion 11a formed in the guide groove 1.
5c, and the head 11b is positioned within the space between the lower surface of the top plate 1c and the upper surface of the guide plate body 15a.
a. A fluid pressure cylinder device 16 is provided inside the top plate 1c at the back of the guide plate 15 so that the center lines coincide with the two rods L8 and R8, and at the tip of the piston rod 17 of the fluid pressure cylinder device 16 The knuckle body 10 of the knuckle joint 12 is fixed. Therefore, the cylinder device 16 is supplied from a fluid pressure source (not shown).
The knuckle joint is moved back and forth and the door is opened and closed by alternately supplying the pressure fluid to the front and rear chambers. A stop plate 1 for regulating the forward end positions of the left and right support plates 5 is provided at the outermost end positions of the inner rails 4 on both left and right side surfaces 1 b of the fixed cover 1.
8 are respectively attached.

Next, a door opening / closing angle regulating mechanism 21 that locks the door L2 and the door R2 so as not to be opened and closed will be described with reference to FIG. The door opening and closing angle regulating mechanism 21 is provided in a state where the intermediate positions of the rod L8 and the rod R8 are connected. In the middle position of the rod L8, the support member 2 formed in a flat plate shape in a horizontally formed half-moon shaped groove 8a
The other end 22a is inserted, and is swivelably supported by a short axis 23 in a horizontal plane. A blind hole 22b is formed in the other end of the support 22, and one end of the sleeve body 24 is inserted into the blind hole 22b.

An outer peripheral groove 24a is formed near the insertion end of the sleeve body 24, and a half-moon piece 25 divided into two is inserted into the outer peripheral groove 24a. The halves 25 are fixed to the other end surface of the support 22 with bolts, respectively, to prevent the sleeve body 24 from falling off the support 22. With this structure, the sleeve body 24 is rotatable with respect to the axis with respect to the support body 22. The sleeve body 24 has a sleeve shape with the other end opened, and a lead cam groove 24b is formed on the inner peripheral surface of the sleeve.

On the other hand, one end 26a of a round bar 26 formed in the shape of a flat plate is inserted into a half-moon-shaped groove 9a which is horizontally engraved also at an intermediate position of the rod R8. Supported as possible. The other end of the round bar 26 is fitted in the sleeve 24 so that the center line thereof is aligned with the center line so as to be axially movable and relatively rotatable, but the round bar 26 itself does not rotate. A pin 28 is protruded at one position on the outer peripheral surface of the cylindrical body near the sleeve body insertion end of the round bar body 26, and as shown in FIG.
4b and are engaged.

Next, the shape of the lead cam groove 24b is shown in FIG. In this embodiment, the pin 28 moves in the axial direction as shown in FIG. 4, and the sleeve body turns. In FIG. 5, however, the description will be made on the assumption that the round bar body turns and the sleeve body is fixed. In FIG. 5, the left side is the sleeve body 24.
The right side is the opening side 9B of the sleeve. The lead cam groove 24b is formed by a closed side cam surface 24c on the back side 9A and an open side cam surface 24d on the opening side 9B. The closed side cam surface 24c is
A guide surface (a-1) (an operating surface when closed) inclined to the upper right in FIG. 5 and a guide surface (b) (an inactive surface when opened) inclined to the upper right in FIG. ), The first valley (c) concave on the back side 9A from the guide surface (a-1) to the guide surface (b), and the guide surface (b) from the guide surface (b).
A cam surface which surrounds the circumference diagonally with a convex two-step mountain portion (d) on the opening side over 1) is formed.

The opening side cam surface 24d is inclined with respect to the axis of the sleeve body 24, and is inclined upward and to the right relative to the guide surface (a-1) of the closing side cam surface 24c to form a lead cam groove. The guide surface (e-1) (the inactive surface when closed) and the guide surface (f) which incline to the lower right and constitute the lead cam groove, facing the guide surface (b) of the closing side cam surface 24c.
(Operation surface when opening), a convex portion (g) projecting to the back side from the guide surface (e-1) to the guide surface (to) and the guide surface (f).
From the opening to the guide surface (e-1) on the opening side
And a cam surface surrounding the circumference obliquely is formed. For this reason, the lead cam groove 24b is formed by the first cam groove direction changing portion 24 to the back side including the first valley (c) and the crest (g).
e, and two inflection portions in the opposite directions of a second cam groove direction changing portion 24f toward the opening side, which is formed by a two-step mountain portion (d) and a two-step valley portion (h).

The valley bottom of the first valley (c) of the closed cam surface 24c is provided at a position shifted downward in FIG. 5 from the crest of the ridge (g) of the open cam surface 24d. Have been. That is, the guide surface (f) is provided from a position straddling the same phase position as the first valley (c). Here, the same phase position means that two positions are on the same radiation surface with respect to the center line of the sleeve body 24, and that the phases are shifted means that the two positions are on different radiation surfaces. Therefore, since the start of the guide surface (f) starts before the first valley (c), the guide is guided by the guide surface (a-1) and is located at the position (a) of the first valley (c). When the pin 28 arrives, when the sleeve body 24 and the round bar body 26 move in the axial direction away from each other, the pin 28 must be on the guide surface (f) of the opening side cam surface 24d (b).
Abut the position. Before the end of the guide surface (f), the lead angle is increased and connected to the valley (h).

Two small concave valleys are formed in the valley (h) of the opening side cam surface 24d, and the first second valley (i) and the next fourth valley (h) are formed. And (d) have valleys on the same plane perpendicular to the axis of the sleeve 24 and are provided at positions shifted in phase. The fourth valley (nu) may be shifted toward the opening in the axial direction. Between the second valley (R) and the fourth valley (N), there is a small ridge (R) standing up from the valley (R) on a wall surface that is slightly parallel to the sleeve axis or slightly inclined without permission. A second inclined surface (ヲ) that is formed and forms an angle of approximately 45 degrees from the small mountain portion (ル) to the valley bottom of the fourth valley portion (ヌ) is formed.

The second ridge (d) on the closed cam surface 24c corresponding to the second valley (h) on the open cam surface 24d has a second crest.
One small third concave valley (W) that engages with the pin 28 is provided in the middle of the phase between the valley (R) and the fourth valley (N). Acts to lock R2 in the open state. The top of the first ridge (f) following the guide surface (b) of the two-step ridge (d) is provided at a position out of phase with respect to the bottom of the second valley (r) in FIG. In FIG. 5, a first steeply inclined surface (Y) is formed from the top of the first peak (f) to the bottom of the third valley (W). The directions of inclination of the first steeply inclined surface (Y) and of the second inclined surface (ヲ) are opposite to each other.

The first inclined surface (Y) is provided in a state (upper position in FIG. 5) straddling the phase position of the second valley (R). Therefore, the pin 28 that has reached the position (d) of the second valley (i) of the opening side cam surface 24d is
When 4 and the round bar 26 move in the axial direction approaching each other,
Be sure to abut on the position (e) of the first steeply inclined surface (Y). The small mountain part (R) faces almost the center position of the steeply inclined surface (Y). The valley bottom position of the third valley (W) of the closed cam surface 24c is provided at a position shifted downward in FIG. 5 from the top position of the small ridge (R) of the open cam surface 24d. . That is, the second inclined surface (ヲ) is provided so as to straddle the same phase position as the third valley (W). Therefore, when the pin 28 which has reached the position (f) of the third valley (W) moves in the axial direction in which the sleeve body 24 and the round bar body 26 are separated from each other, the pin 28 always becomes (g) on the second inclined surface (ヲ). A).

The top of the small ridge (ta) on the guide surface (a-2) side of the two-step ridge (d) of the closed cam surface 24c is higher than the valley bottom of the fourth valley (nu) in FIG. And at a position out of phase with a substantially central position of the inclined surface (ヲ).
Accordingly, the guide surface (a-2)) is provided so as to straddle the same phase position as the fourth valley (nu). Therefore, when the pin 28 which has reached the position (h) of the fourth valley (nu) moves in the axial direction in which the sleeve 24 and the round bar 26 move closer to each other, the pin 28 must be guided by the closing cam surface 24c. 2) Abut on the position (j). In other words, the position (h) is located at the top (d) of the closed side cam surface 24c in the circumferential direction and the door L
This is a position where the lock of the open state of the door 2 and the door R2 is released.

Then, the pin 28 is moved from the position (j) of the guide surface (a-2) to the position (a) of the first valley (c) through the position (k) and the position of the guide surface (a-2). Return. On the circumferential surface of the sleeve body 24, the above-described lead cam groove 24b is formed so as to go around 360 degrees. Lead cam groove 2
The door L2 and the door R2 are fixed to the fixed cover 1 when the pin 28 moves in the position 4b and the pins 28 are in the positions (d) and (h).
Slightly open to both side surfaces 1b. When the pin 28 is at the position f, the door L2 and the door R2 are slightly closed to the both side surfaces 1b of the fixed cover 1 and become freely accessible. The pin 28 is located at an intermediate position of the distance α between the positions (d) and (f).
Is reached, the door L2 and the door R2 are completely parallel to the both side surfaces 1b of the fixed cover 1. In addition, even if the door L2 and the door R2 open freely, the outer surface of the door L2 and the door R2 has a gap in the fixed cover 1 such that the outer surface does not contact the inner surface of the rail 4.

[Operation] The door L2 and the door R2 are shown in FIGS.
Assume that it is in the closed state shown in FIG. At this time, by supplying the pressurized fluid to the front chamber of the fluid pressure cylinder device 16, the piston rod 17 and the knuckle joint 12 are at the retracted position, and the support plate 5 is at the forward end. Door L2
7 (a), (b), (c) and (d) in order to open the door R2.

In order to complete the cutting by the machine tool and to open the door L2 and the door R2 from the closed state to the open state, a pressurized fluid is supplied to the rear chamber of the fluid pressure cylinder device 16 and the forward movement of the piston causes the piston to move forward. When the piston rod 17 and the knuckle joint 12 are advanced, the knuckle pin 11 is advanced along the guide groove 15c of the guide plate 15. Rod L8 and rod R8
Is pushed to move forward and acts to move the door L2 and the door R2 forward.

However, since the support plate 5 connected to the door L2 and the door R2 is prevented from moving forward by the stop plate 18,
The door L2 and the door R2 start turning and opening as shown in FIG. 7B. The pin 28 of the round bar 26 moves in the axial direction from the first valley (c) along the guide surface (f). The subsequent forward movement of the piston rod 17 by the fluid pressure cylinder device 16 causes the knuckle joint 12 to move forward and the knuckle pin 11
Is guided by the guide groove 15c, and the forward end is prevented by the regulating end of the guide groove 15c. On the other hand, the pin 28 of the round bar 26 is located at the second valley (R) from the guide surface having a larger lead angle from the guide surface (F). At this time, the door L2 and the door R2 are opened slightly more than parallel to both side surfaces 1b of the fixed cover 1.

Next, when the piston is caused to reversely move backward by switching the pressurized fluid to the front chamber of the hydraulic cylinder device 16, the pin 28 is moved from the second trough to the third trough. ) The opening and closing angle regulating mechanism 21 of the door which is moved and locked
, The door L2 and the door R2 are temporarily prevented from closing and locked. The lock state will be described in detail with reference to FIG. After the door is locked with the door open, the knuckle joint 12 is retracted by the subsequent retraction of the piston of the fluid pressure cylinder device 16, and the door L2 and the door R2 remain parallel to the both side surfaces 1b of the fixed cover 1 in the closed locked state. It is pulled into the fixed cover 1 in a slightly more self-contained posture.

Next, the door L2 and the door R2 are shown in FIGS.
The relationship between the lead cam groove 24d and the pin 28 in the door opening / closing angle regulating mechanism 21 when sequentially operating (c) and (d) will be described with reference to FIG.

When the doors L2 and R2 are in the closed state shown in FIG. 7A, the knuckle joint 12 is at the retracted end, and the pin 28 is at the position of the first valley (c) in the lead cam groove 24b. . When the piston rod 17 and the knuckle joint 12 start to advance by supplying a pressure fluid to the rear chamber of the fluid pressure cylinder device 16, the included angle of the rod L8 and the rod R8 gradually increases, and the door L2 and the door R2 are hinged. The left and right are gradually opened while turning at 7, and the state of FIG. 7B is obtained. At this time, the round bar 26 is moved in the direction in which the round bar 26 is pulled out from the sleeve 24. Then, the pin 28 comes into contact with the guide surface (f) of the opening side cam surface 24d from the position (a) to the position (b), and
(C) along the guide surface (f), and reaches the position (d) of the second valley (r) via the arc-shaped guide surface having an increased lead angle.

Since the round bar 26 protruding the pin 28 is prevented from rotating with respect to the axis, the lead cam groove 24
b is formed in the lead cam groove 24b.
Is turned in the direction of arrow A in FIG. 5 according to the inclination angle of the guide surface (f). When the pin 28 reaches the position (d), the knuckle pin 11 of the knuckle joint 12 is regulated by the guide groove 15c of the guide plate 15 and is at the forward end position. At this time, door L
2 and door R2 are completely open and both sides 1b of fixed cover 1
7C, it is slightly more open than parallel, and the state shown in FIG.

Next, when the supply of the pressurized fluid to the front chamber of the fluid pressure cylinder device 16 is switched, the piston rod 17 and the knuckle joint 12 start to retreat, and the rod L8 and the rod R8
Moves so as to reduce the included angle, and the sleeve body 24 and the round bar body 26 move closer to each other. And pin 28
5 moves from the position (d) to the position (e) in FIG. 5 and comes into contact with the first inclined surface (Y), while turning the sleeve body 24 in the direction of arrow A to the position (f) along the inclined surface. Reached third
With the valleys (W). As a result, the pin 28 is
The door L2 and the door R2 are locked in an open state.

At this time, the door L2 and the door R2 are fixed to the fixed cover 1.
Is slightly closed rather than parallel to both side surfaces 1b. In this state, the piston rod 17 and the knuckle joint 12 are retracted by the supply of the pressure fluid continued to the hydraulic cylinder device 16. The rod L8 and the rod R8 are shown in FIG.
Therefore, the door L2 and the door R2 are pulled into the fixed cover 1 while maintaining the open angle, and the state shown in FIG. 7D is obtained.

After the work has been removed and attached to the machine tool, pressurized fluid is supplied to the rear chamber of the hydraulic cylinder device 16 to close the door L2 and the door R2, and the piston rod 17 and the knuckle joint 12 move forward, and the rod L8 and rod R8 are operated to increase the included angle, and move in the axial direction in which the round bar body 26 is pulled out of the sleeve body 24. Then, the pin 28 moves from the position (f) to the position (g), contacts the second inclined surface (ヲ), rotates the sleeve body 24 in the direction of arrow A by the component force of the inclined surface, and moves to the position (h). When the pin 28 arrives and engages with the fourth valley (nu), the pin 28 is prevented from going rightward.

At this time, the door L2 and the door R2 are fixed to the fixed cover 1.
When it is housed inside, it is slightly opener than it is parallel to both side surfaces 1b of the fixed cover 1. When the supply of the pressure fluid to the rear chamber of the fluid pressure cylinder device 16 is continued, the piston rod 17 and the knuckle joint 12 advance, and the door L2 and the door R2 are pushed forward from the fixed cover 1 in an open state.

When the pressurized fluid is switched to the front chamber of the fluid pressure cylinder device 16 after the push-out of the door L2 and the door R2 from the fixed cover 1 is completed, the piston rod 17, the knuckle joint 12 is retracted, and the rod L8 and the rod R9 are moved. Is reduced, and the round bar 26 is pushed into the sleeve 24. For this reason, the pin 28 moves in the axial direction from the position (h) of the fourth valley (nu), abuts on the guide surface (a-2) at the position (j), and is caused by the component force of the inclined surface. Is turned in the direction of arrow A. The pin 28 moves leftward in FIG. 5 through the lead cam groove 24b. Thus, the doors L2 and R2 are gradually closed with a large turning moment in the closing direction, and are completely closed when the pin 28 reaches the position (a) of the first valley (c). At this time, a brake pad is provided as needed between the support plate 5 and the rail 4 so as not to move. Alternatively, means for adding some resistance may be provided.

In the above description, the case where the lead cam groove 24b is engraved on the sleeve body 24 and the pin 28 protrudes from the round bar body 26 has been described. It is also possible to provide a lead cam groove on the outer peripheral cylindrical surface of the rod 26. Further, it is possible to rotate the round bar 26 without rotating the sleeve 24. Also, the hydraulic cylinder device has been described as a driving device of the knuckle joint, but a servo motor and a ball screw mechanism may be used.

[0041]

Since the automatic double door according to the present invention is constructed as described above, the following effects can be obtained. The automatic double door according to claim 1, wherein one end of a rod is pivotally connected to each of the left and right doors, the other end of each rod is pivotally connected as a knuckle joint, and the knuckle joint is moved along the guide groove of the guide plate. As a result, both the left and right doors can be stably opened and closed along the guide grooves by a simple mechanism by pivotally connecting two rods using a knuckle joint.

In the two automatic double doors, rails are attached to both sides and inside of the fixed cover so that the support plates of the right and left doors supporting the hinge can be moved in the direction of the guide plate. As a result, both the left and right doors can be housed inside the fixed cover, and the doors do not interfere with the attachment and detachment of the work to and from the machine tool.

According to a third aspect of the present invention, the double door has a sleeve mounted on one of the rods and a round rod mounted on the other rod, and the round rod is fitted in the sleeve so as to be movable in the axial direction. , Only one of the sleeve and the round bar is rotatable,
One of the sleeve body and the round bar body is provided with a lead cam groove and the other is provided with a pin which engages with the cam groove, and a cam groove direction changing portion and a mechanism for regulating the included angle of the two rods at one place of the lead cam groove. Since both doors are installed, the fully opened state of both doors can be easily locked, and the doors can be smoothly pulled into the fixed cover with the both doors opened.

According to a fourth aspect of the present invention, there is provided a double door, wherein the guide surface guides the axial movement of the pin as a lead cam groove engaged with the pin, a valley for preventing the axial movement of the pin at a predetermined position, and the axial movement of the pin. The angle between the two rods is restricted to a predetermined position, and the angle of the two rods is restricted to a predetermined position. Can be locked in the open state and the door can be unlocked in the open state.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of a double door according to the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a rail and a roller.

FIG. 3 is a structural explanatory view of a knuckle joint.

FIG. 4 is an explanatory diagram of an opening / closing angle regulating mechanism.

FIG. 5 is a development view of a lead cam groove.

FIG. 6 is an explanatory diagram showing an engagement relationship between a lead cam groove and a pin.

FIGS. 7A and 7B are skeleton diagrams showing an operating state of the double door, in which FIG. 7A is a state in which the door is closed, FIG. 7B is a state in which the door is about to open, FIG. 7C is a state in which the door is open, and FIG. FIG. 4 is a view showing a state where the door is pulled into the fixed cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed cover 1a Opening L2, R2 Door 4 Rail 5 Support plate 6 Roller 7 Hinge L8, R8 Rod 12 Knuckle joint 15 Guide plate 16 Fluid pressure cylinder 21 Door opening / closing angle regulating mechanism 24 Sleeve body 24b Lead cam groove 24c Closed cam Surface 24d Open-side cam surface 26 Round bar 28 Pin A, B, E, F Guide surface C First valley Re Second valley Nu Fourth valley ヲ Second slope W Third valley Part Yo First slope Ka, Lu, Ta Yamabe

Claims (3)

[Claims] 1. A double-sided door which is pivotally opened and closed with one end supported by one side of each of the two sides of a cover which is an opening of a rectangular parallelepiped fixed cover, and which is separated from a supporting position by two of the double-sided doors. Two rods having one end pivotally supported at a distance, a knuckle joint pivotally connecting the other ends of the two rods, and a direction perpendicular to the door attached to the fixed cover and closed. A guide plate provided with a guide groove for guiding the movement of the knuckle joint, a driving device for moving the knuckle joint along the guide groove, and inside of both side covers of the fixed cover supporting the two doors A guide rail attached to the guide plate in a direction, a support plate pivotally attached at the support position and provided inside the guide rail, and engaged with the guide rail provided on the support plate. Support An automatic double door that has a group of rollers that can guide and move the plate, and each door can be pulled inside the fixed cover. 2. A sleeve body which is attached to a middle position between one of the two rods so as to be swivelable in a horizontal direction, and is attached to a middle position between the other rods so as to be able to swivel in a horizontal direction. Providing a round bar body fitted in the sleeve of the sleeve body so as to be movable in the axial direction, and providing one of the sleeve body and the round bar body rotatably with respect to the axis thereof; A lead cam groove having a direction changing portion of a cam groove formed at two places which are circumferentially separated from each other and are shifted in phase by approximately 180 ° on one of the bodies, and a pin for engaging the lead cam groove is provided on the other. The opening angle of the two rods is locked in one of the direction changing portions of the lead cam groove at the beginning of the process in the door closing direction, and the process proceeds to the process in the door opening direction to release the lock. As It provided part for restraining the serial pin, automatic double doors door according to claim 1 which features a rod angle restricting mechanism so as to restrict the included angle of the two rods. 3. The rod angle restricting mechanism includes a cam groove direction changing portion on a side of a door opening process end of the cam groove direction changing portion of the lead cam groove, the outer side being an advancing end of the door opening process of the pin. A first valley is provided in the cam groove wall, and at the beginning of the door closing step, the pin is retracted in the axial direction by a predetermined amount from the first valley, and a second valley is formed on the inner cam groove wall at a position where the opening angle of the rod is locked. A valley is provided, and the sleeve body is turned to the outer cam groove wall side along which the pin advances when the sleeve body is rotatable while reaching the second valley from the first valley, or a round bar if the pin is rotatable. An inclined surface for rotating the body toward the outer cam groove wall along the retreat of the pin is provided continuously to the inner cam groove wall in front of the second valley, and after the pin is located in the second valley, the pin is again rotated. Is advanced in the axial direction by a predetermined amount from the first valley of the outer cam groove wall. A third valley is provided in the outer cam groove wall at a position facing the entrance of the lead cam groove through which the pin is shifted in the circumferential direction at the time of retreat, and the sleeve body is pivotable while reaching the third valley from the second valley. If it is a round rod, the sleeve is turned to the side of the lead cam groove through which the pin moves forward, but if it is a round bar, the round surface is turned to the side of the lead cam groove through which the pin retreats. It is provided continuously to the cam groove wall, and in the next door closing step, the pin located in the third valley can be moved toward the other cam groove direction changing part via the lead cam groove passing at the time of retreating. The automatic double door according to claim 2.