JP5756367B2 - Work machine body moving device - Google Patents

Description

  The present invention relates to a work machine main body moving apparatus, and more particularly to an apparatus for moving a work machine main body with respect to a base by a screw mechanism including a male screw member and a nut screwed together.

  Patent Document 1 below describes an electronic circuit component mounting system in which a plurality of electronic circuit component mounting machines are arranged in a row on a system base. In this electronic circuit component mounting system, wheels are provided on the mounting body of the electronic circuit component mounting machine, and the operator guides the guide rail by being engaged with the guide rail provided on the system base. The mounting machine main body can be pulled forward from the system base while the electronic circuit component mounting machine is maintained.

  In addition, in the screen printing machine described in the specification of Japanese Patent Application No. 2010-110427, which has not been disclosed yet, the printing machine main body is supported by the base so as to be movable forward, and moved by a screw mechanism. It is supposed to let you. The male screw member is provided on the main body of the printing press so as to be rotatable and cannot be moved relatively in the axial direction, and the nut is provided on the base so as not to be rotatable and relatively movable in the axial direction. The printer body is moved forward and backward with respect to the base. This screw mechanism is a ball screw mechanism in which a male screw member and a nut are screwed together via a plurality of balls, and the coefficient of friction between the male screw member and the nut is small, and an operator makes the male screw member small. Can be rotated with force.

JP 2004-104075 A

However, there is still room for improvement in the printer main body moving device including this screw mechanism. For example, when an operator enters the space obtained behind the printing press main body by pulling out the printing press main body from the base and performing maintenance work on the internal device from the rear of the printing press main body, another work is performed. If the printer body is moved by the operator, there is a risk that unnecessary force will be applied to the parts and wiring of the device being worked on, or the instrument being used, etc., resulting in damage. There is inconvenience that there is. In particular, when the screw mechanism is a ball screw mechanism, even if the operator does not rotate the male screw member, if the forward or backward force is applied to the printing press main body, the male screw member rotates, and the printing press main body As a result, the parts, wiring, or instrument can be further damaged, or the operator can be surprised.
This inconvenience is caused by an electronic circuit component mounting machine, an adhesive application machine, a circuit board inspection machine, a mounting state inspection machine, a counter circuit board working machine other than a screen printing machine, and a working machine other than a circuit board working machine, for example, The same occurs when the work implement main body is moved relative to the base in various working machines such as an assembling machine for assembling the object to be assembled to the object and a heating machine for heating the object.
The present invention has been made with the above circumstances as a background, and an object of the present invention is to improve a work machine main body moving apparatus that moves a work machine main body with respect to a base by a screw mechanism.

The above-described problems are that one of the male screw member and the nut that are screwed together is relative to the working machine body that is the main body of the work machine, and the other is relative to the base that movably supports the main body of the work machine. While either one of the male screw member and the nut is a rotatable screw member, the other of the male screw member and the nut is made non-rotatable, and the rotary screw member is rotated. A work machine main body moving device including a screw mechanism for moving the work machine main body with respect to the base, comprising: (a) an operation device main body and an operation member detachably attached to the operation device main body, A rotation operating device that is provided on one of a work machine main body and the base and rotates the rotating screw member by rotating the operation member attached to the operating device main body; (b) a fixed engagement portion fixedly provided on a side of the work implement main body and the base that holds the rotational operation device; and (c) a fixed engagement portion provided in the rotational operation device. A movable engagement portion that is movable to an engagement position that engages with the joint portion and prevents rotation of the rotary operation device and a non-engagement position that does not engage, and (d) the operation member is moved from the operation device main body. And a movable engagement portion control device that keeps the movable engagement portion in the engagement position in the detached state and moves the movable engagement portion to the non-engagement position when the operation member is attached. It is solved by.
It should be noted that the configuration of the working machine main body moving device is said that "one of the male screw member and the nut screwed to each other is held on the work machine main body and the other is the base so that they cannot move relative to each other in the axial direction". In functioning as an element, in principle, it does not move with respect to the work machine main body and the base, and as in the embodiments described later, it can be moved relatively by a short distance for practical reasons. Is not excluded.

  If the operating member is mounted on the operating device body, the operator can easily rotate the rotating screw member by the operation, and the movable engaging portion is positioned at the engaging position and rotated unless the operating member is mounted. Impedes rotation of the device. Therefore, even if a rotational torque is applied to the rotary operation device by some means, or a forward or backward force is applied to the work implement body, the rotation screw member is prevented from rotating, and the work implement body moves forward or backward. It is prevented from being retracted. Thus, for example, if the operator removes the operation member from the rotary operation device while the work implement body is pulled forward from the base, and the movable engagement portion is not moved to the non-engagement position, The machine body is not retracted, and even if the worker is working behind the machine body, the parts and wiring of the work target device or the instrument in use may be damaged or the operator may be surprised. Is avoided.

Aspects of the Invention

  In the following, the invention which is recognized as being claimable in the present application (hereinafter, referred to as “claimable invention”. The claimable invention is a subordinate concept invention of the present invention which is the invention described in the claims) And may include inventions of a superordinate concept of the present invention or other concepts). As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiment, the prior art, the common general technical knowledge, and the like. An aspect in which a constituent element is added and an aspect in which the constituent element is deleted from the aspect of each section can be an aspect of the claimable invention.

  In each of the following terms, (1) corresponds to claim 1, (2) corresponds to claim 2, (3) corresponds to claim 3, (4) corresponds to claim 4, (5) corresponds to claim 5, (6) corresponds to claim 6, (7) corresponds to claim 7, and (10) corresponds to claim 8.

(1) One of the male screw member and the nut that are screwed together is a work machine main body that is the main body of the work machine, and the other is a base that movably supports the work machine main body, so that relative movement in the axial direction is impossible. One of the male screw member and the nut is held as a rotatable screw member while the other of the male screw member and the nut is made non-rotatable and the rotary screw member is rotated. By the working machine body moving device including a screw mechanism for moving the working machine body relative to the base,
An operating device main body and an operating member that can be attached to and detached from the operating device main body; provided on one of the work implement main body and the base; and the operating member is attached to the operating device main body and rotated. A rotating operation device for rotating the rotating screw member;
A fixed engagement portion fixedly provided on the work machine main body and the base on the side holding the rotary operation device;
A movable engagement portion that is provided in the rotation operation device and is movable to an engagement position that engages with the fixed engagement portion and prevents rotation of the rotation operation device; and a disengagement position that does not engage;
The movable engagement member keeps the movable engagement portion in the engagement position when the operation member is detached from the operation device main body, and moves the movable engagement portion to the non-engagement position when the operation member is attached. A work machine main body moving device comprising: a joint control device.
The base may be a component of the work machine, and may be a member that is not included in the work machine and supports the work machine.
The fixed engagement portion may be constituted by a part of the work machine main body and the base that holds the rotary operation device, or a separate member may be fixed.
(2) The movable engagement portion control device is
A biasing device that biases the movable engagement portion toward the engagement position;
When the operation member is held on the operation device main body so as to be relatively movable and the operation member is mounted on the operation device main body, the movable engagement portion is attached to the biasing device by being moved by a part of the operation member. And a movable member that moves to the disengaged position by overcoming the force.
The operation member has a crank shape and is fitted to the rotation center position of the rotation operation device so as not to be relatively rotatable, thereby enabling the rotation operation device to be rotated and moving the movable engagement portion to the non-engagement position. It is also possible to make it. However, if the operation member is a straight rod, as in the aspect described in the next section, the operation member can be easily attached and detached.
(3) A through hole is formed in the operating device main body at a position deviating from the rotational axis of the operating device main body, parallel to the rotational axis, and the movable member is movable in the axial direction in the through hole. The operation member is fitted in a straight rod shape so as not to protrude forward from the hole, and the movable member is moved as the tip portion of the operation member is inserted into the through hole. The member is moved in the axial direction, and the movable engagement portion is moved to the non-engagement position against the urging force of the urging device based on the movement in the axial direction. Machine body moving device.
Since the movable member is fitted into the through hole without protruding forward from the through hole, it is difficult for the operator to move the movable member directly to the non-engagement position without using the operation member, Even if there is no operation member, the movable member is prevented from being moved to the non-engagement position. It is particularly desirable that the movable member is disposed at a position deeper than the opening of the through hole.
The rod-shaped operation member shall be fitted to the through hole so as to be relatively rotatable, or the portion gripped by the hand of the operation member should be rotatable relative to the portion fitted to the through hole. Is desirable.
(4) A protruding portion that always protrudes rearward from the through hole of the movable member is provided with a large-diameter portion that is larger in diameter than the movable member, and the movable member is maintained at the forward position by the biasing device. In the state where the large diameter portion engages with the fixed engagement portion to prevent the rotation operation of the rotation operation device, and the movable member is retracted against the urging force of the urging device, the large diameter portion The work machine main body moving device according to (3), wherein the diameter portion is not engaged with the fixed engagement portion, and the large diameter portion functions as the movable engagement portion.
It is also possible to fit the movable member to the operation device main body so as not to be relatively rotatable, and to provide a protrusion that protrudes from the movable member toward the fixed engagement portion, and the protrusion functions as the movable engagement portion. . However, if the movable member is provided with a large-diameter portion and the large-diameter portion functions as a movable engagement portion, there is an advantage that the movable member and the large-diameter portion need not be made unrotatable.
(5) Item (3) or (4), wherein an operation member storage portion capable of storing the operation member removed from the through hole is provided in a portion different from the through hole of the operation device main body. Work machine body moving device.
The operation member may be stored in an arbitrary storage unit. However, if the storage unit is provided in the operation device main body, the operation member can be easily handled.
(6) The male screw member is provided with a flange portion having a diameter larger than that of the male screw portion, the flange portion constitutes the operating device main body, and the through hole is formed in the first eccentric portion eccentric from the rotation axis of the flange portion. The working machine main body moving device according to item (5), wherein a storage hole as the operation member storage portion is formed in a second eccentric portion different from the first eccentric portion.
The nut may be a rotating screw member. However, in that case, it is necessary to rotate the nut in which the male screw member has penetrated, and the rotation operation device is connected to a rotation member different from the nut and the rotation of the other rotation member to the nut. A rotation transmission device for transmission is required, and the configuration of the rotation operation device is complicated. On the other hand, if it is set as the structure of this term, it is possible to make a flange part fixed to an external thread part function as an operating device main body, and can attain simplification of a structure. The flange portion may have a circular cross-sectional shape or a non-circular shape.
(7) The work machine main body moving device according to any one of (1) to (6), wherein the male screw member is held by the work machine main body, and the nut is held by the base.
In an aspect in which this item is subordinate to the item (6), when a rotary operation device that rotates a male screw member that is a rotary screw member held by the work implement main body is operated by an operator, the rotation operation device is operated by the work implement main body. And moved relative to the base. Therefore, the operator recognizes that the work implement main body is moved by operating the rotary operation device, and operates while feeling the actual movement. When the work implement main body is covered by the housing and the housing is moved with respect to the base together with the work implement main body, the operator can also recognize the movement of the housing.
(8) The work machine main body movement according to any one of (1) to (7), wherein the screw mechanism is a ball screw mechanism in which a male screw member and the nut are screwed together via a plurality of balls. apparatus.
In the ball screw mechanism, the male screw member and the nut easily rotate relative to each other, and the work machine body and the base easily move relative to each other. Therefore, the rotation screw member is prevented from rotating unless the operation member is mounted. Is particularly effective.
(9) The base is provided with an operation member holding portion capable of holding the operation member in a state where a part of the operation member is located within the movement locus of the work implement body, and the operation member holding portion is provided with the operation member. The work machine main body moving device according to any one of (1) to (8), wherein the member is held to prevent movement of the work machine main body in at least one direction.
The operation member also functions as a stopper, and even if the movable engagement part is moved to the non-engagement position without using the operation member and the rotary screw member may be rotated, the movement of the work implement main body is prevented. Is done.
In the aspect of this section, when the operating member is held by the operating member holding portion of the base, for example, through a through-hole formed so as to penetrate the ear portion protruding horizontally from the work implement main body in the vertical direction. If the operating member is held by the operating member holding portion, such as being held by the operating member holding portion, the contact portions are positioned on both sides of the operating member in the moving direction of the work implement body. Thus, both the forward movement and the backward movement of the work machine main body can be prevented.
(10) The operation member held by the operation member holding portion is engaged with the work implement main body in a state where the work implement main body is at least one of the forward end position and the reverse end position with respect to the base. The work machine main body moving device according to the item (9), wherein the operation member holding portion is provided at a position where the operation member can be held.
The operation member holding portion may be provided such that the work machine main body is prevented from moving at a position between the forward end position and the backward end position with respect to the base.

It is a perspective view which shows the electronic circuit assembly line containing the screen printer provided with the printing machine main body moving apparatus which is one Embodiment of claimable invention. It is a side view which shows the said screen printer. It is a side view which shows the printing apparatus of the said screen printer, a mask holding | maintenance apparatus, etc. It is a side view (partial cross section) which shows the screw mechanism of the said printing press main body moving apparatus. It is a figure explaining the movement of the nut of the screw mechanism at the time of drawing-out with respect to the base of the above-mentioned printing machine main body, and drawing-in. It is a side view (partial cross section) which shows the drawing-in apparatus of the said screen printer. FIG. 7A is a rear view showing the screen printing machine, FIG. 7A is a view showing a state where a detachable handle is not fitted in the fitting hole, and FIG. 7B is a diagram showing a state where the detachable handle is fitted in the fitting hole. It is a figure which shows the state combined. It is a perspective view which shows the said printing press main body moving apparatus in cross section. FIG. 9 is a plan view (partly in section) showing a movable engagement portion control device of the printing press main body moving device, and FIG. 9A is a view showing a state where the engagement plate is located at the engagement position. b) is a diagram showing a state in which the engagement plate is located at the non-engagement position. It is a perspective view which shows the rotation operation apparatus, engagement member, etc. of the said printing press main body moving apparatus. It is a front view which shows a part of said rotation operating device and an engaging member. It is a side view which shows the state by which the said printing machine main body was pulled out from the base forward.

  Embodiments of the claimable invention will be described in detail below with reference to the drawings. In addition to the following embodiments, the claimable invention can be implemented in various modifications based on the knowledge of those skilled in the art, including the aspects described in the above [Aspect of the Invention] section. .

  FIG. 1 illustrates an electronic circuit assembly line. There are one or more electronic circuit assembly lines, a plurality of units in the present embodiment, for example, two screen printing machines 10 (hereinafter, abbreviated as the printing machine 10), one or more units, and a plurality of units in the present embodiment. For example, four electronic circuit component mounting machines 14 (hereinafter, abbreviated as mounting machines 14) are provided. The printing machine 10 and the mounting machine 14 are a kind of a board working machine that performs work on a circuit board that is a work target material, and an electronic circuit assembly line is a kind of a board working line.

  The two printing machines 10 constitute a screen printing line, and are adjacent to each other upstream in the circuit board conveyance direction in the electronic circuit assembly line with respect to the four mounting machines 14 and parallel to the circuit board conveyance direction. They are arranged side by side. In the present embodiment, the left-right direction is the circuit board transport direction, and the direction orthogonal to the transport direction is the front-rear direction. In the present embodiment, the left-right direction and the front-rear direction are both horizontal.

The two printing machines 10 are configured in the same manner, and the upstream printing machine 10 will be described as a representative.
In the present embodiment, the printing machine 10 includes a printing machine main body 20 that is a working machine main body and a base 22, as shown in FIG. The base 22 is installed on the floor surface 26 at the leg portions 24 provided at the four corners thereof, and the printing press main body 20 is supported by the base 22 so as to be movable forward from the state of being entirely on the base 22. Yes.

  The printing press main body 20 is formed by assembling a plurality of members, and includes a plurality of step portions, in this embodiment, an upper step portion 28, a middle step portion 30, and a lower step portion 32. As shown in FIG. 3, a mask holding device 34 and a printing device 36 are provided in the upper stage portion 28, and a substrate transfer support device 38 and a passing substrate transfer device 40 (see FIG. 2) are provided in the middle step portion 30. The mask holding device 34 holds the mask 44 placed on the mask support base 42 in a horizontal posture. The printing device 36 includes a pair of squeegees 46, a squeegee moving device 48 that moves the squeegees 46 in the front-rear direction along the mask 44, and a squeegee lifting device that lifts and lowers the pair of squeegees 46. 50 and provided above the mask holding device 34.

  The substrate transport support device 38 is provided on one side in the front-rear direction of the middle stage portion 30 and includes a conveyor device 60 and a substrate support device 62. In the printing machine 10, the side on which the substrate conveyance support device 38 is provided in the front-rear direction is the front side. The mask holding device 34 and the printing device 36 are provided above the substrate conveyance support device 38. In this embodiment, the conveyor device 60 is configured by a belt conveyor, and the circuit board 64 is conveyed by the conveyor device 60 in a posture in which the printing surface is horizontal and is carried below the mask 44, and the substrate support device 62. Are supported from below by a support pin 66 and clamped by a substrate clamping device (not shown), and in that state, are lifted and lowered by a lifting device (not shown) to be brought into contact with and separated from the lower surface of the mask 44.

  As shown in FIG. 2, the passing substrate transfer device 40 is provided at the rear of the middle stage 30, includes a conveyor device, and is provided in parallel with the substrate transfer support device 38. In this embodiment, the conveyor device is constituted by a belt conveyor, and the passing substrate transfer device 40 passes the circuit board 64 through the screen printing machine 10 without performing solder printing.

  In the lower part 32 of the printing machine main body 20, as shown in FIG. 7, a device that constitutes the printing machine 10, for example, a control device 70 that controls the printing machine 10, which is a kind of electrical component, is housed. The control device 70 is mainly composed of a computer and controls drive sources and the like of various devices constituting the printing press 10. Most of the motors constituting the drive source in the printing press 10 are a kind of electric motors, and are constituted by servo motors that are rotary electric motors capable of accurately controlling the rotation angle. You may comprise by a pulse motor or a linear motor. The control device 70 is controlled in an integrated manner by an overall control device 72 (see FIG. 1) that controls the entire electronic circuit assembly line. The overall control device 72 is mainly composed of a computer.

  In the printing press 10, the printing press main body 20 is moved forward and backward with respect to the base 22 by an operator operating the printing press main body moving device 120 which is a working machine main body moving device. The main body 20 of the printing press is moved forward by the movement in the direction in which the passing substrate transporting device 40 is located on the upstream side, and is drawn forward from the base 22. The resistance of relative movement with respect to the base 22 of the printing press main body 20 is reduced by the resistance reducing device 122. Further, the printing press main body 20 is provided with a wheel device 124 at the center in the width direction of the front end portion thereof. The wheel device 124 is configured in the same manner as the wheel device described in the specification of the Japanese Patent Application No. 2010-110427, and a description thereof is omitted.

  As shown in FIG. 2, the resistance reduction device 122 includes a first resistance reduction unit 130 and a second resistance reduction unit 132. The resistance reducing unit 130 includes a pair of guides 134 provided on the base 22 and a pair of engagement blocks 136 provided on the printing press main body 20. The guide 134 has a rail shape, and is fixed to both ends of the rear portion of the upper surface of the base 22 that are separated in the left-right direction in parallel to the front-rear direction. Further, the pair of engagement blocks 136 are fixedly provided at both end portions of the rear end portion of the lower surface of the printing press main body 20 separated in the left-right direction. FIG. 2 shows one of a pair of guides 134 and an engagement block 136.

  The resistance reducing unit 132 includes a pair of guides 138 provided on the printing press main body 20 and a pair of engagement blocks 140 provided on the base 22. The guide 138 has a rail shape and is fixed in parallel to the front and rear directions at both ends of the lower surface front portion of the printing press main body 20 which are separated in the left and right direction. The engagement block 140 is formed at the front end portion of the upper surface of the base 22. They are fixedly provided at both ends separated in the left-right direction. FIG. 2 shows one of a pair of guides 138 and an engagement block 140.

  The engagement blocks 136 and 140 are fitted to the guides 134 and 138 so as to be relatively movable in the front-rear direction. In the present embodiment, the engagement blocks 136 and 140 each hold a plurality of steel balls (not shown) so as to be able to go around along the circumferential circuit, and a part of each of the steel balls causes a pair of guides 134 and 138 to be paired. Each side surface is engaged with a guide groove formed in a state extending in the front-rear direction and not only supports the load of the printing press main body 20, but also when an external force is applied to the printing press main body 20 for some reason. The printer body 20 is prevented from floating from the base 22. In the present embodiment, a plurality of steel balls that are rolling elements and guide grooves of the guides 134 and 138 constitute a floating prevention device. The structure of this lifting prevention device is well known, and illustration and description thereof are omitted.

  The printing press main body moving device 120 includes a screw mechanism 151 including a male screw member 148 and a nut 150 screwed together as shown in FIG. The male screw member 148 is attached to the front side of the lower surface of the printing press main body 20 so that the male screw portion 152 is parallel to the front-rear direction so as not to be relatively movable in the axial direction and to be rotatable. It is rotated by being operated by an operator. The front end portion of the male screw member 148 reaches the front end portion of the printing press main body 20. The male screw member 148 is provided between the wheel device 124 and each of the pair of engaging blocks 140 and guides 138 in the left-right direction of the printing press main body 20, and the screw mechanism 151 is Are provided on the side close to one of the engagement blocks 136 and 140 and the guides 134 and 138 provided in pairs.

  As shown in FIG. 4, the nut 150 is provided at the front portion of the base 22 and is screwed with the male screw portion 152 of the male screw member 148 while holding a plurality of steel balls. In the present embodiment, the male screw member 148 is a rotary screw member, and the screw mechanism 151 is a ball screw mechanism. In addition, in FIG. 8, illustration of the steel ball is omitted. In the present embodiment, the nut 150 is provided with protrusions 156 and 158 at two locations separated from each other on the lower surface of the nut 150 in the front-rear direction to form an engagement portion, and these protrusions 156 and 158 The nut 150 is provided in a state of being positioned before and after the engaging portion 160 provided in the screw 22. The engaging portion 160 is made of a beam material in the left-right direction of the base 22, and the interval between the protrusions 156 and 158 is longer than the length in the front-rear direction of the engaging portion 160, and as shown in FIG. A space in the front-rear direction is provided between the base 22 and the base 22.

  The gap in the vertical direction between the nut 150 and the engaging portion 160 is made small, thereby preventing rotation of the nut 150 around the axis parallel to the front-rear direction with respect to the base 22 and making the rotation impossible. . Further, the nut 150 is provided with a clearance in the front-rear direction between the nut 22 and the nut 150 so as to be relatively movable in the axial direction with respect to the base 22, but one of the protrusions 156, 158. Is engaged with the engagement portion 160 to prevent the base 22 from moving in the axial direction, making the relative movement impossible in the axial direction. In this state, the rotation operating device 154 is rotated, whereby the male screw member 148 is moved. Is rotated in the axial direction, and the printing press main body 20 is moved forward and backward with respect to the base 22. The reason for providing a play will be described later. The base may be provided with a pair of engaging portions, and the nut may be provided with an engaging portion that selectively engages with the pair of engaging portions.

  The forward end position and the backward end position of the printing press main body 20 with respect to the base 22 are defined by a stopper device 164 shown in FIG. In the present embodiment, the stopper device 164 is protruded upward from the upper surface of the base 22 and the protrusion-like printer main body side stopper 166 that protrudes downward from the lower surface of the printer main body 20. And a pair of base-side stopper portions 168 and 170 having a protruding shape. The base side stopper portions 168 and 170 are provided at a distance in the front-rear direction, and the advancing end position of the printing press main body 20 is defined by the contact of the printing press main body side stopper portion 166 with the base side stopper portion 168 on the front side. The retracted end position is defined by contact with the base-side stopper 170 on the rear side.

  In the present embodiment, the front-side base-side stopper 168 is configured such that the center of gravity of the printing press main body 20 has the base 22 in a state where the printing press main body 20 is moved to the forward end position with respect to the base 22. Is provided at a position located behind the front end of the portion that supports the printing press main body 20. Further, as shown in FIG. 6, the rear base-side stopper portion 170 is provided at a position where the position where the entire printing press main body 20 is drawn onto the base 22 is the retracted end position.

  In the present embodiment, as shown in FIG. 6, a pull-in device 180 as a power drive device is provided, and the printing press main body 20 is automatically positioned at the retracted end position. The retractor 180 uses an air cylinder 182 as a drive source. The air cylinder is a kind of fluid pressure cylinder as a fluid pressure actuator, and operates with compressed air as power. In this embodiment, the air cylinder 182 is a single-acting cylinder in which the piston is urged in the backward direction by an elastic member (not shown), and one end of the cylinder housing 184 is rotatably attached to the base 22. A lever 188 as an engaging member is attached to the tip of the rod 186. The lever 188 is pivotally attached to the base 22, and an arm portion 190 extended from its pivot axis is pivotally connected to the piston rod 186. Further, a roller 194 is rotatably attached to the tip of another arm part 192 that extends from the rotation axis of the lever 188 to the opposite side of the arm part 190, and a rotation engaging part that is an engaging part. Is configured.

  As shown in FIG. 6, an engaging protrusion 196 is provided at the lower end of the printing press main body 20 to form an engaged part. The lever 188 is rotated by the expansion and contraction of the piston rod 186, and as indicated by the solid line, the roller 194 is positioned below the moving path of the engaging protrusion 196 and a retracted position that allows its advancement and retraction, and a two-dot chain line. As shown, the roller 194 is caused to enter the movement path, and is moved to an operating position where the roller 194 is engaged with the engaging protrusion 196 and the printing press main body 20 is retracted. The retracting device 180, the engaging protrusion 196, and the stopper device 164 are provided at different positions in the left-right direction.

  The air cylinder 182 is operated based on the output signal of the sensor 200 (see FIG. 1) provided in the base 22, and the operation is released based on the output signal of the sensor 202 (see FIGS. 1 and 5). The The sensors 200 and 202 are configured by, for example, a transmissive photoelectric sensor that is a photoelectric sensor that is a kind of a non-contact sensor, and outputs different signals depending on whether or not the light receiving unit receives light. In the present embodiment, the sensor 200 is prevented from receiving light from the light receiving portion by the printing press main body side stopper portion 166, the signal changes from ON to OFF, and compressed air is supplied to the air cylinder 182 based on the change, and the lever 188 is rotated to the working position. For this reason, the sensor 200 and the engaging protrusion 196 are configured so that the roller 194 is engaged with the printing machine main body side stopper 166 and the rear base side stopper 170 in a state where the distance is shorter than the operation stroke of the roller 194. It is provided at a position where it can be engaged with the front end surface of 196, press the printing press main body 20 backward, and keep pressing even when it is positioned at the retracted end position. The printing press main body side stopper portion 166 is provided with a protrusion 204 extending forward from the front end thereof, and constitutes a detected portion together with the printing press main body side stopper portion 166, and the printing press main body 20 is located at the backward end position. Even in the state of being moved to, the light reception of the light receiving unit is hindered. Therefore, the operation of the air cylinder 182 keeps the printing press main body 20 in the state of being located at the retracted end position.

  The sensor 202 is provided at a position of the base 22 where the output signal changes in accordance with the size of the play between the protrusion 158 on the rear side of the nut 150 and the engaging portion 160. In the state where the printing machine main body 20 is positioned at the retracted end position, there is a gap between the protrusions 156 and 158 and the engaging portion 160 as shown in FIG. When the machine main body 20 is pulled out from the base 22, the nut 150 moves rearward with respect to the male screw member 148, and the protrusion 156 engages with the engagement part 160, so that the protrusion 158, the engagement part 160, The gap between the two becomes larger and becomes the maximum as shown in FIG. Therefore, the sensor 202 positions the printing press main body 20 at the retracted end position, and in a state where the gap is shorter than the maximum, the light receiving unit is prevented from receiving light and outputs an OFF signal, and before the gap reaches the maximum state, the light receiving unit Is provided at a position where it enters a light receiving state and outputs an ON signal.

  Based on the change of the output signal of the sensor 202 from OFF to ON, the air chamber of the air cylinder 182 is opened to the atmosphere, the lever 188 is rotated to the retracted position, and the advancement of the printing press body 20 with respect to the base 22 is performed. Permissible. In the present embodiment, the sensor 202 constitutes a release command device that commands the operation release of the retracting device 180. The release command device may be configured by a switch operated by an operator. The operator operates the switch prior to the drawing operation from the base 22 of the printing press main body 20, and inputs the operation release to the control device so that the air chamber of the air cylinder 182 is opened to the atmosphere. .

  The printer main body 20 is covered with a housing 220 as shown in FIG. The housing 220 is provided with an opening necessary for delivery of the circuit board on the downstream side and the upstream side of the printing press 10, and an opening 222 is formed in a portion corresponding to the male screw member 148 on the front surface of the housing 220. Yes.

  As shown in FIG. 4, a disk having a diameter larger than that of the male screw portion 152 is concentrically fixed to the front end portion of the male screw member 148, and a flange portion 240 is provided to constitute an operating device main body of the rotary operating device 154. And can be rotated integrally with the male screw portion 152. In the present embodiment, the opening 222 has a circular shape with a diameter slightly larger than the diameter of the flange portion 240.

  As shown in FIG. 8, the flange portion 240 is formed with a through hole 250 in the first eccentric portion that is deviated from the rotation axis and is eccentric, and is linearly moved as a kind of movable member. A rod 252 as a member is fitted through a sleeve 254 so as to be movable in the axial direction. The through-hole 250 has a stepped shape as shown in FIG. 9, and the portion opened on the front surface of the flange portion 240 is a small-diameter hole portion 256 having the smallest diameter, and the portion opened on the rear surface is the diameter. Is the largest large-diameter hole portion 258, and a portion between the hole portions 256 and 258 is a medium-diameter hole portion 260 having a diameter larger than that of the small-diameter hole portion 256 and smaller than the large-diameter hole portion 258. In the present embodiment, the diameter of the small-diameter hole portion 256 is such a size that an operator cannot thrust a finger, for example, 8 mm.

  The sleeve 254 has a stepped shape with a circular cross section, the large diameter portion 264 is fitted into the large diameter hole portion 258 and fixed to the flange portion 240, and the small diameter portion 266 is rearward from the rear surface of the flange portion 240. It is made to protrude. The inner diameter of the large diameter portion 264 is larger than the inner diameter of the small diameter portion 266 and smaller than the inner diameter of the medium diameter hole portion 260.

  The rod 252 has a circular cross-sectional shape, and the fitting portion 268 is fitted into the small diameter portion 266 of the sleeve 254 so as to be movable in the axial direction, and the protruding portion forward from the small diameter portion 266 has a large diameter. Part 264 and medium diameter hole 260 are housed. A flange portion 270 having a larger diameter than the fitting portion 268 is provided at the front end portion of the fitting portion 268, and the rod 252 is provided between the flange portion 270 and the large diameter portion 264 and the small diameter portion 266 of the sleeve 254. It is urged | biased ahead by the compression coil spring 274 arrange | positioned between the shoulder surface 272 of this step shape. The compression coil spring 274 is a spring as an elastic member which is a kind of urging device. As shown in FIG. 9A, the forward limit of the rod 252 by the bias of the spring 274 is such that the flange portion 270 has a stepped shoulder surface 276 between the medium diameter hole portion 260 and the small diameter hole portion 256. The rod 252 is fitted in the through hole 250 in a state of being located at a position deeper than the front end opening of the through hole 250. The position where the forward limit of the rod 252 is defined is defined as the forward position.

  As shown in FIG. 9A, the rear portion of the rod 252 is a protruding portion 290 that protrudes rearward from the sleeve 254 even when the rod 252 is positioned at the advanced position, and always protrudes rearward. An engagement plate 292 is concentrically fixed to the protrusion 290 so as to be detachable. The engagement plate 292 has a disk shape whose diameter is larger than that of the fitting portion 268 and constitutes a large diameter portion.

  As shown in FIG. 8, the flange portion 240 is a second eccentric portion that is different from the portion provided with the through hole 250 and is eccentric from the rotation axis of the flange portion 240, and penetrates the rotation axis. A storage hole 300 is formed on the side opposite to the hole 250 (a side away from the through hole 250 about the rotation axis by 180 degrees), and an operation member storage portion is provided. The storage hole 300 is formed through the flange portion 240 in parallel to the rotation axis thereof, and a detachable handle 302 as an operation member is fitted into the storage hole 300.

  The detachable handle 302 is a straight bar having a circular cross-sectional shape, and constitutes a rotary operation device 154 together with the flange portion 240. The fitting portion 306 to be fitted into the storage hole 300 of the detachable handle 302 is made larger than the diameter of the small diameter hole portion 256 of the through hole 250. An operation portion 308 having a diameter that is smaller than that of the fitting portion 306 and that can be inserted into the small-diameter hole portion 256 is provided at a tip portion that is one end portion in the axial direction of the fitting portion 306. The diameter of the operation portion 308 is set to a size that allows the small-diameter hole portion 256 to have a sliding clearance so as to be slidable in the axial direction. A head 310 having a diameter larger than that of the fitting portion 306 is provided at the other end in the axial direction of the detachable handle 302. Therefore, the detachable handle 302 is inserted into the storage hole 300 from the operation unit 308.

  As shown in FIG. 8, the flange portion 240 is provided with a ball plunger 312 serving as an engaging tool at a portion corresponding to the central portion in the direction parallel to the center line of the storage hole 300. The ball plunger 312 is fitted in the housing 314 so that the ball 316 is movable, and is biased in a direction protruding from the housing 314 by a spring (not shown), and is perpendicular to the housing hole 300. Is provided. The fitting portion 306 of the detachable handle 302 is formed with an annular groove 318 that is a recess and opens on the outer peripheral surface thereof. The groove 318 has a trapezoidal cross-sectional shape perpendicular to the circumferential direction, and the ball 316 is fitted into the groove 318 of the fitting portion 306 fitted in the storage hole 300, so that the detachable handle 302 is inserted into the storage hole 300. Pull in. The pull-in limit of the detachable handle 302 or the limit of insertion into the storage hole 300 is defined by the head portion 310 coming into contact with the front surface of the flange portion 240. As a result, the detachable handle 302 is housed and held in a state in which the head portion 310 abuts against the front surface of the flange portion 240 and protrudes forward from the flange portion 240 and is prevented from being pulled out by the flange portion 240. In this state, the head 310 is located in the housing 220. Since the recess into which the ball 316 is inserted is an annular groove 318, the phase when inserting the detachable handle 302 into the storage hole 300 may be any, and the operator can store the detachable handle 302 in the storage hole 300. Can be easily performed.

  As shown in FIG. 10, an engaging member 330 is fixed to the lower surface of the front end portion of the printing press main body 20 to constitute a fixed engaging portion. The engaging member 330 includes an L-shaped engaging portion 332 and is two engaging surfaces that intersect with each other, and in this embodiment, are orthogonal to each other, and a vertical engaging surface 334 and a downward and horizontal engaging surface. And a mating surface 336 (see FIG. 11). In this embodiment, as shown in FIG. 9A, the engaging member 330 is engaged with the engaging portion 332 in a direction parallel to the axial direction of the rod 252 in a state where the rod 252 is located at the advanced position. In the direction that is located at the same position as the plywood 292 and intersects the axis of the rod 252, the engagement surfaces 334 and 336 are within the turning trajectory around the rotation axis of the flange 240 of the engagement plate 292, as shown in FIG. It is provided in the position located in.

  Therefore, in the state where the rod 252 is located at the forward movement position, the engagement plate 292 abuts against the engagement surface 334 or 336, thereby preventing the flange portion 240 from rotating one or more times in both forward and reverse directions. The rotation of the male screw member 148 is impeded. On the other hand, if the rod 252 is retracted against the urging force of the spring 274, the engagement plate 292 is disengaged from the engagement portion 332 in the axial direction of the rod 252 as shown in FIG. The flange portion 240 is allowed to rotate and the male screw member 148 is allowed to rotate. In the present embodiment, the engagement plate 292 constitutes a movable engagement portion, and the position of the engagement plate 292 in a state where the rod 252 is located at the forward movement position is the engagement position, and the axial direction of the rod 252 of the engagement plate 292 The position disengaged from the engaging portion 332 in FIG. The engagement plate 292 is urged toward the engagement position by the spring 274 via the rod 252, and the rod 252 and the spring 274 constitute an engagement plate control device 340 that is a movable engagement portion control device.

  As shown in FIG. 7A, the base 22 is formed with a fitting hole 350 as an operation member holding portion so that the detachable handle 302 is fitted. The fitting hole 350 is in the movement locus with respect to the base 22 of the printing press main body 20, and is a position corresponding to the screw mechanism 151 in the left-right direction of the base 22, and of the pair of guides 134, the screw mechanism 151. The base 22 is provided so as to penetrate the base 22 in the vertical direction at a position adjacent to the guide 134 on the near side. Further, in the front-rear direction, the fitting hole 350 is an attachment / detachment handle fitted into the fitting hole 350 in a state where the printing press main body 20 is located at the forward end position with respect to the base 22 as shown in FIG. 302 is provided at a position where it can be engaged with the back surface or the rear surface of the printing press main body 20. Therefore, even when the male screw member 148 is strongly rotated by some means in a state where the attachment / detachment handle 302 is fitted in the fitting hole 350, even when a large backward force is applied to the printing press main body 20, the force is The detachable handle 302 fitted in the fitting hole 350 is received on substantially the same line of operation, so that a large rotational moment around the vertical axis is not generated in the printing press main body 20, and the guides 134, 138 and the engagement blocks 136, 136 are not generated. 140 damage is better avoided.

  As shown in FIG. 7A, the fitting hole 350 has a stepped shape in this embodiment and is opened on the upper surface of the base 22 so that the fitting portion 306 of the detachable handle 302 is fitted. It includes a large-diameter hole 352 and a small-diameter hole 354 that has a diameter smaller than that of the large-diameter hole 352 and is open on the lower surface of the base 22 and allows the operation unit 308 to be inserted. The fitting limit of the detachable handle 302 to the fitting hole 350 is that the tapered shoulder surface 355 between the fitting portion 306 and the operation portion 308 is stepped between the large diameter hole portion 352 and the small diameter hole portion 354. In this embodiment, when the detachable handle 302 is fitted in the fitting hole 350, a part of the fitting portion 306 and the head portion 310 are separated from the base 22. While projecting upward, the head 310 faces the rear surface of the printing press main body 20 and is in an engageable state.

  As shown in FIGS. 2 and 7, a shuttle conveyor 370 is attached to the printing press 10 on the downstream side of the printing press main body 20. As shown in FIG. 2, the shuttle conveyor 370 includes a conveyor body 372, a movable conveyor 374 and a conveyor moving device 376. The conveyor main body 372 is fixed to the downstream side surface of the printing press main body 20 by a plurality of bolts (not shown), and the shuttle conveyor 370 floats from the floor 26 as shown in FIG. And is moved with respect to the base 22 together with the printing machine main body 20. The shuttle conveyor 370 delivers the circuit board between the upstream and downstream work machines. The shuttle conveyor 370 is covered by a housing 380 (see FIG. 1) and is controlled by the control device 70 of the printing press 10.

  In the present embodiment, the four mounting machines 14 are configured in the same manner as the electronic circuit component mounting machine described in Japanese Patent Application Laid-Open No. 2004-104075, and are modularized. As shown in FIG. Each of which includes a mounting machine main body 390, a substrate transfer device 392, a substrate support device 394, a component supply device 396, a component mounting device 398, a control device 400, and the like, and is responsible for mounting electronic circuit components on a single circuit board. , In parallel. The substrate transfer device 392 includes a pair of conveyors 402. In the present embodiment, these conveyors 402 are constituted by belt conveyors, and are arranged in parallel in the front-rear direction of the mounting machine main body 390. A substrate support device 394 is provided for each of the two conveyors 402, and a circuit board conveyed by any of the conveyors 402 is supported by the substrate support device 394, and mounting of electronic circuit components is performed. The control device 400 is composed mainly of a computer and is controlled by the overall control device 72 in an integrated manner.

  In the electronic circuit assembly line configured as described above, the printing agent on the circuit board is printed in parallel in the two printing machines 10, and in this embodiment, the cream solder (hereinafter abbreviated as solder) is printed. Is done. Of the two printing machines 10, the circuit board on which the solder is printed in the upstream printing machine 10 is supplied to the board conveyance support device 38, supported by the board support device 62, and brought into contact with the mask 44. According to 36, solder is printed. After printing, the circuit board is transferred to the movable conveyor 374 of the shuttle conveyor 370. Then, it is carried from the movable conveyor 374 to the passing substrate transfer device 40 of the downstream printing machine 10 and passes through the printing machine 10, and the uppermost mounting machine 14, for example, is moved by the shuttle conveyor 370 of the downstream printing machine 10. Then, it is carried into the rear conveyor 402 and electronic circuit components are mounted.

  Further, the circuit board on which the solder is printed in the downstream printing machine 10 is supplied to the passing board conveying device 40 of the upstream printing machine 10, passed through the upstream printing machine 10, and downstream by the shuttle conveyor 370. It is carried in the board | substrate conveyance support apparatus 38 of the printing machine 10 of the side, and a solder is printed. Then, the shuttle conveyor 370 loads the uppermost mounting machine 14 to, for example, the front conveyor 402 and mounts electronic circuit components.

  In the printing press 10, as shown in FIG. 2, the printing press main body 20 is normally drawn onto the base 22 and is kept in a state of being located at the retracted end position by the operation of the drawing-in device 180. Further, as shown in FIG. 5A, there is a gap between the protrusions 156 and 158 of the nut 150 and the engaging portion 160 of the base 22. Further, the detachable handle 302 is housed in the housing hole 300 as shown in FIG. 8, and the rod 252 is positioned at the forward position by the urging force of the spring 274 as shown in FIG. It exists in the state which is located in an engagement position and prevents rotation of the external thread member 148.

  Therefore, when the operator pulls out the printing press main body 20 from the base 22 for maintenance or the like, the operator puts his / her hand into the housing 220 through the opening 222 and pulls out the detachable handle 302 from the storage hole 300, and FIG. As shown in (a), the operation portion 308 is inserted into the small diameter hole portion 256. When pulling out the detachable handle 302, the operator picks up the head 310 and removes it. The head 310 is used as a knob. Then, the operator pushes the rod 252 with the operation portion 308 and moves it against the urging force of the spring 274, and the flange portion 270 contacts the large diameter portion 264 of the sleeve 254 as shown in FIG. 9B. Retreat until. The engagement plate 292 is moved to the non-engagement position by the retraction of the rod 252 and is in a state of being disengaged from the engagement portion 332. The operation unit 308 has a length sufficient to move the engagement plate 292 from the engagement position to the non-engagement position, and the detachable handle 302 is also an engagement release member. The sleeve 254 functions as a guide member that guides the movement of the rod 252 and also functions as a position defining member or stopper that defines the retreat limit of the rod 252 and the disengagement position of the engagement plate 292.

  When the engagement plate 292 is moved to the non-engagement position, the operator rotates the flange portion 240 around the rotation axis while pressing the rod 252 with the attachment / detachment handle 302, and rotates the male screw member 148 to perform printing. The machine body 20 can be pulled forward from the base 22. When the rotation operation device 154 is operated by an operator, the housing 220 that covers the printing press main body 20 and the rotation operation device 154 provided in the printing press main body 20 are pulled out from the base 22 together with the printing press main body 20. By using the attachment / detachment handle 302 in this manner, the operator can rotate the flange portion 240 more easily than when directly rotating the flange portion 240. Further, in the state where the operation portion 308 is inserted into the through hole 250 and the engagement plate 292 is moved to the non-engagement position, the attachment / detachment handle 302 has a part of the fitting portion 306 and the head portion 310 outside the housing 220. Protruding state. Therefore, the operator can perform the operation of inserting the operation unit 308 into the through hole 250 and the operation of rotating the male screw member 148 outside the housing 220, and the operation is easy.

  Since there is a gap between the protrusions 156 and 158 of the nut 154 and the engaging portion 160 of the base 22, the male screw member 148 does not move at the beginning of the operation of the rotary operation device 304, and the nut 150 is in relation to the male screw member 148. The front projection 156 is engaged with the engagement portion 160 as shown in FIG. Therefore, the gap between the protrusion 158 and the engagement portion 160 is increased, the signal of the sensor 202 changes from OFF to ON, and it is detected that the printing press main body 20 is pulled out. Then, the lever 188 is rotated to the retracted position to allow the printing machine main body 20 to be pulled out, and the male screw member 148 is advanced by rotating the flange portion 240, thereby, as shown in FIG. The printer main body 20 is pulled out from the base 22 together with the housing 220. The shuttle conveyor 370 is also pulled out together with the printing machine main body 20 and moved forward with respect to the base 22.

  The printing machine main body 20 is drawn out by the guides 134 and 138 and the engagement blocks 136 and 140, and the movement resistance is reduced by rolling of the steel balls, and the drawing is performed lightly. The operator can pull out the printing press main body 20 to the forward end position, but the printing press main body 20 has a large pull-out amount from the base 22 by fitting with the guides 134 and 138 of the engagement blocks 136 and 140. Regardless of this, the portion overlapping the base 22 is always supported at the four corners and is stably supported.

  In a state where the operator pulls out the printing machine main body 20 to the forward end position, an empty space is obtained above the rear portion of the base 22 as shown in FIG. The printing machine 10 is often provided with its back surface along the wall surface. However, since the shuttle conveyor 370 is moved to the front of the base 22 together with the printing machine body 20, the printing machine 10 is also vacant behind the shuttle conveyor 370. Thus, the operator can enter the space behind the printing press main body 20 and can perform maintenance on the control device 70 and the like from the back side of the printing press main body 20. Even when the printing press 10 is arranged back-to-back with another device, the forward movement of the printing press main body 20 and the shuttle conveyor 370 provides a free space behind them. The other apparatus may be a printing machine, a mounting machine, an adhesive application machine, a board inspection machine, or the like, and may be a substrate working machine other than the printing machine, or may be an apparatus other than the board working machine. For example, two sets of lines similar to the electronic circuit assembly line shown in FIG. 1 may be arranged symmetrically so that the printers and the mounting machines are back to back, or two sets of electronic circuit assemblies The line may be provided with a phase rotated by 180 degrees so that the printing machine and the mounting machine are back to back.

  After the printing machine body 20 is pulled out, the operator pulls out the operation unit 308 of the attachment / detachment handle 302 from the through hole 250. Accordingly, the rod 252 is moved to the forward movement position by the urging force of the spring 274 as shown in FIG. 9A, and the engagement plate 292 is moved to the engagement position. Then, the operator enters the space on the rear side of the printing press body 10 with the attachment / detachment handle 302 removed from the flange portion 240, and as shown in FIGS. 7B and 12, the fitting hole of the base 22 is inserted. 350.

  Therefore, the attaching / detaching handle 302 is not in the flange portion 240, and another operator who has come to the front of the drawn printing press main body 20 cannot rotate the flange portion 240 to retract the printing press main body 20. Even if another operator puts a hand into the housing 220 through the opening 222 and rotates the flange portion 240 to rotate the male screw member 148 to return the printing press main body 20 onto the base 22, the engagement plate 292 does not move. Since it is located at the engaging position, it abuts on the engaging portion 332 of the engaging member 330 that is provided in the printing press main body 20 and pulled out from the base 22 together with the engaging plate 292, and the male screw member 148 rotates. Hinder. Therefore, the printing press main body 20 is not retracted and returned to the base 22, surprises the worker who is working behind the printing press main body 20, and the components and wiring of the control device 70 that is the work target. Etc. are avoided from being damaged. The same applies when another operator attempts to return the press body 20 to the base 22.

  Since the rod 252 is located at a position retracted from the front end opening of the through-hole 250 in the forward position, another operator pushes the rod 252 by hand and moves the engagement plate 292 in the non-engagement position. It is difficult to rotate the flange portion 240. In particular, in the present embodiment, since the diameter of the small-diameter hole portion 256 is set to a size that prevents the operator from pushing the finger, the rod 252 cannot be pushed and the engagement plate 292 is moved to the non-engagement position. I can't let you. Temporarily, another worker thrusts a rod-like member similar to the attachment / detachment handle 302 into the small-diameter hole 256 separately from the attachment / detachment handle 302, pushes the rod 252, moves the engagement plate 292 to the non-engagement position, Even if the printer main body 20 is rotated and stored on the base 22, the detachable handle 302 fitted to the base 22 hits the back of the printer main body 20 and prevents retreat.

  When the operator returns the printing machine body 20 onto the base 22 after the work in the space behind the printing machine body 20 is finished, the detachable handle 302 is removed from the fitting hole 350 and the operation part 308 is removed from the small diameter hole part 256. And the rod 252 is pushed to move the engagement plate 292 to the non-engagement position. In this state, the attachment / detachment handle 302 is rotated in the direction opposite to that when the printing press body 20 is pulled out. At the beginning of the rotation operation, the male screw member 148 does not move in the axial direction, the nut 150 is moved forward with respect to the male screw member 148, and the rear projection 158 is engaged as shown in FIG. 5 (c). Is engaged with the portion 160. When the attachment / detachment handle 302 is further rotated from this state, the male screw member 148 is retracted, and the printing press main body 20 is drawn onto the base 22 together with the housing 220. Although the detection signal of the sensor 202 changes from ON to OFF due to the movement of the nut 150, this change is ignored by the control device 70 and is not used. When the rotation operation device 154 is operated by an operator, the rotation operation device 154 is moved together with the printing press main body 20 and the housing 220 and returned onto the base 22.

  If the printing press main body side stopper projection 166 is detected by the sensor 200 as the printing press main body 20 is pulled onto the base 22, the air cylinder 182 is actuated and the lever 188 is rotated to the operating position. The printer main body 20 is automatically moved to the retracted end position. Even if the operator is not conscious, the printing press main body 20 is always reliably positioned at the retracted end position. At this time, the nut 150 is moved rearward together with the male screw member 148 because there is a gap between the protrusion 156 and the engaging portion 160 as shown in FIG. For this reason, the male screw member 148 is not rotated, but only retreats, and the rotation operation device 154 is not rotated. The clearance between the nut 150 and the engaging portion 160 is larger than the stroke by which the drawing device 180 retracts the printing press main body 20 to the retracted end position, and the drawing of the printing press main body 20 by the drawing device 180 is a male screw member. 148 and the rotation operation device 154 are allowed without rotation. Therefore, the operator does not feel discomfort due to the rotation operation device 154 rotating more than his own operation. The shuttle conveyor 370 is also retracted along with the drawing of the printing machine main body 20, and returned to a position aligned with other printing machines 10 and the like. After returning, the operator removes the detachable handle 302 from the through hole 250, fits into the storage hole 300, and stores it in the flange portion 240.

The electronic circuit assembly line may be a line including one printer.
Further, the printing machine may not have a passage substrate transfer device. In such a printing machine, a shuttle conveyor is provided as necessary. For example, the shuttle conveyor is provided when a device to which a circuit board on which a printing material is printed is provided with a plurality of substrate transfer devices arranged in parallel. It is done.

  DESCRIPTION OF SYMBOLS 10: Screen printer 20: Printer main body 22: Base 120: Printer main body moving apparatus 151: Screw mechanism 240: Flange part 292: Engagement plate 302: Detachment handle 330: Engagement member

Claims (8)

One of the male screw member and the nut that are screwed together is held on the work machine body that is the main body of the work machine, and the other is held on the base that movably supports the work machine main body so as not to be relatively movable in the axial direction. In addition, either one of the male screw member and the nut is a rotatable screw member, while the other of the male screw member and the nut is non-rotatable, and the rotating screw member is rotated, A work machine main body moving device including a screw mechanism for moving the work machine main body with respect to the base,
An operating device main body and an operating member that can be attached to and detached from the operating device main body; provided on one of the work implement main body and the base; and the operating member is attached to the operating device main body and rotated. A rotating operation device for rotating the rotating screw member;
A fixed engagement portion fixedly provided on the work machine main body and the base on the side holding the rotary operation device;
A movable engagement portion that is provided in the rotation operation device and is movable to an engagement position that engages with the fixed engagement portion and prevents rotation of the rotation operation device; and a disengagement position that does not engage;
The movable engagement member keeps the movable engagement portion in the engagement position when the operation member is detached from the operation device main body, and moves the movable engagement portion to the non-engagement position when the operation member is attached. A work machine main body moving device comprising: a joint control device. The movable engagement portion control device is
A biasing device that biases the movable engagement portion toward the engagement position;
When the operation member is held on the operation device main body so as to be relatively movable and the operation member is mounted on the operation device main body, the movable engagement portion is attached to the biasing device by being moved by a part of the operation member. The work implement main body moving device according to claim 1, further comprising: a movable member that overcomes the force and moves the force to the disengaged position.   A through hole is formed in the operating device main body at a position deviating from the rotational axis of the operating device main body in parallel with the rotational axis, and the movable member can move in the axial direction in the through hole and forward from the through hole. The movable member is fitted in a state that does not protrude into the shaft, and the operating member is formed into a straight rod shape, and the movable member is pivoted as the tip end portion of the operating member is inserted into the through hole. The work implement main body moving device according to claim 2, wherein the movable engaging portion is moved to the disengaged position against the urging force of the urging device based on the movement in the axial direction. .   In a state in which a large-diameter portion larger in diameter than the movable member is provided in a protruding portion that always protrudes rearward from the through hole of the movable member, and the movable member is maintained at the forward position by the biasing device. If the large-diameter portion engages with the fixed engagement portion to prevent the rotation operation of the rotation operation device, and the movable member is retracted against the urging force of the urging device, the large-diameter portion is The work implement main body moving device according to claim 3, wherein the working engagement body main body moving device is in a state of not engaging with the fixed engagement portion, and the large diameter portion functions as the movable engagement portion.   5. The work implement main body moving device according to claim 3, wherein an operation member storage portion capable of storing the operation member removed from the through hole is provided in a portion different from the through hole of the operation device main body.   The male screw member is provided with a flange portion having a diameter larger than that of the male screw portion, the flange portion constitutes the operating device main body, and the through hole is formed in the first eccentric portion that is eccentric from the rotation axis of the flange portion. The work machine main body moving device according to claim 5, wherein a storage hole as the operation member storage portion is formed in a second eccentric portion different from the first eccentric portion.   The work machine main body moving device according to any one of claims 1 to 6, wherein the male screw member is held by the work machine main body, and the nut is held by the base.   The operating member can be held on the base in a state where a part of the operating member is located within the movement trajectory of the work implement main body, and the work implement main body is in a forward end position and a reverse end position with respect to the base. With the operation member holding portion provided at a position where the operation member can be engaged with the work implement main body in a state in which the operation member is held in the operation member holding portion. The work machine main body moving device according to claim 1, wherein movement of the work machine main body in at least one direction is prevented.

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