JP7323285B2 - processing equipment - Google Patents

Description

The present invention relates to processing equipment.

Conventionally, a workpiece (for example, media) is placed on a mounting unit (for example, a platen), and a processing head (for example, an inkjet head) is moved with respect to the workpiece to process the workpiece ( For example, a processing apparatus (a so-called flat-bed type inkjet printer) has been developed.

As such a processing apparatus, Patent Document 1 discloses a platen 10 having a hollow structure, forward and backward moving mechanisms 17 arranged on both sides of the platen 10 in the sub-scanning direction, and forward and backward moving mechanisms 17 (sub-scanning directions). a second subassembly 4 capable of moving in the scanning direction) and capable of moving the inkjet head 60 in the horizontal direction (main scanning direction).

JP 2014-19121 A

The longitudinal movement mechanism 17 includes a guide member that guides movement of the second subassembly 4 in the longitudinal direction. Here, in the case where the guide member is formed by extrusion molding, the guide member is likely to be distorted (for example, due to its own weight, both ends, one end, or the center portion is lowered due to gravity, and is likely to be bowed). ), but the inkjet printer described in Japanese Patent Laid-Open No. 2002-200000 does not take any countermeasures against the distortion, and cannot prevent the distortion of the guide member. Note that such a problem also applies to a processing apparatus (eg, an inkjet printer having a cutting mechanism, a cutting plotter, etc.) that employs another processing head (eg, a cutter head) instead of or in addition to the inkjet head 60.

SUMMARY OF THE INVENTION An object of the present invention is to provide a processing apparatus that efficiently prevents distortion of a guide member.

A processing apparatus according to a first aspect of the present invention includes:
a placement section on which the workpiece is placed;
a processing head for processing the workpiece mounted on the mounting portion;
and a guide member that guides movement of the processing head,
The placing section has a plurality of spaces inside,
The distortion of the guide member is corrected by being fixed to the mounting portion.

According to the above configuration, since the distortion of the guide member is corrected by fixing the guide member to the mounting section, for example, it is not necessary to use a special member other than the mounting section to correct the distortion. Therefore, distortion of the guide member can be efficiently prevented.

each of the plurality of spaces extends in a direction orthogonal to a mounting surface of the mounting section on which the workpiece is mounted;
You may do so.

According to the above configuration, it is possible to reduce the weight of the mounting section while maintaining the rigidity of the mounting section.

The plurality of spaces are formed by a honeycomb structure,
You may do so.

According to the above configuration, it is possible to reduce the weight of the mounting section while maintaining the rigidity of the mounting section.

The mounting portion has an outer peripheral portion that is thicker than the walls that divide the plurality of spaces when viewed from above,
The guide member is fastened and fixed to the outer peripheral portion by a fastener that screws together with the outer peripheral portion.
You may do so.

According to the above configuration, since the guide member is firmly fixed to the outer peripheral portion, the distortion of the guide member can be effectively corrected.

The guide member is an extruded product,
You may do so.

When the guide member is an extruded product, the guide member tends to be distorted particularly by its own weight, but the distortion is corrected by the above configuration, so that the guide member can be efficiently prevented from being distorted.

The guide member is fixed to the placement section by fasteners at three or more locations,
You may do so.

According to the above configuration, the distortion of the guide member can be effectively corrected.

The guide member is fixed to a side surface and a bottom surface of the placing section,
You may do so.

According to the above configuration, the distortion of the guide member can be effectively corrected.

ADVANTAGE OF THE INVENTION According to this invention, the processing apparatus which prevented distortion of a guide member effectively can be provided.

1 is a schematic overall view of an inkjet printer according to an embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view for explaining the inside of the inkjet printer; FIG. 4 is a plan view for explaining the relationship between the platen and the rail members;

An embodiment in which the present invention is applied to an inkjet printer 100 will be described below with reference to the drawings.

(Configuration of inkjet printer 100)
As shown in FIGS. 1 and 2, the inkjet printer 100 includes a platen (also referred to as a bed) 110, legs 120, first rails 130, second rails 140, and a Y bar 150. , an inkjet head 160 and a carriage 170 . In the following description, the horizontal direction is the main scanning direction (direction in which the inkjet head 160 moves) when the inkjet printer 100 performs a printing operation, and the front-rear direction is the sub-scanning direction. The inkjet head 160 has an elongated shape in the front-rear direction as a whole.

A medium M (FIG. 2) made of a sheet material such as paper or fabric is placed on the platen 110 . The medium M is fixed by a predetermined fixing means. The platen 110 is formed in the shape of a thick plate elongated in the front-rear direction (quadrangular in plan view (when viewed from above)). A detailed structure of the platen 110 will be described later.

The legs 120 support the platen 110 at an upper position spaced apart from the ground (including the floor, etc.).

The first rail portion 130 includes a rail member 131, a rear end member 132, and a front end member 133, and supports the left portion of the Y bar portion 150 so as to be movable in the front-rear direction.

The rail member 131 is made of synthetic resin, metal, or the like, and is integrally formed by extrusion molding, so that the rail member 131 is formed in a shape elongated in the front-rear direction and linearly extended. The rail member 131 includes a rail member body 131A, a first rail 131B, a second rail 131C, and a flange 131D.

The rail member main body 131A has a rectangular (U-shaped) cross section with an open left side. The first rail 131B stands leftward from the inner surface of the rail member main body 131A and extends in the front-rear direction. The second rail 131C rises upward from the bottom surface of the rail member main body 131A and extends in the front-rear direction. The flange 131D protrudes rightward from the lower portion of the side portion of the rail member main body 131A and extends in the front-rear direction. The side portion is a plate-like portion that extends in the up-down and front-rear directions and is in contact with the left side of the platen 110 (the left side of the frame 112 described later). The flange 131D is in contact with the lower surface of the platen 110 (the lower surface of the frame 112 described below).

The rail member main body 131A is fixed to the platen 110 (frame body 112 described later) with screws (including bolts; the same shall apply hereinafter) N1 and N2. Here, the side portion of the rail member main body 131A extending in the vertical and longitudinal directions is fixed to the side surface of the platen 110 (the left surface of the frame 112 described later) at a plurality of locations with a plurality of screws N1 (FIG. 3). See also, here it is fixed at three points, but other number of points may be fixed). The multiple screws N1 are arranged at intervals along the front-rear direction. Further, the flange 131D of the rail member main body 131A is attached to the bottom surface of the platen 110 (the bottom surface of the frame 112 described below) at a plurality of locations (here, the number may be the same as or different from the number of screws N1) by a plurality of screws N2. is fixed to The multiple screws N2 are arranged at intervals along the front-rear direction.

The rear end member 132 and the front end member 133 are attached to the rear end or the front end of the rail member 131 by appropriate means such as screws or fitting. The rear end member 132 and the front end member 133 support a drive mechanism B for moving the Y bar portion 150 in the front-rear direction.

The drive mechanism B here uses a ball screw, and includes a motor B1, a screw shaft B2, a nut B3, and balls (not shown). The motor B1 is connected to one end of the screw shaft B2, and rotates the screw shaft B2 with its central axis (the axis extending in the front-rear direction) as the rotation axis. The nut B3 is attached to the screw shaft B2 via balls. The rear end member 132 rotatably supports the other end of the screw shaft N. As shown in FIG. A motor B<b>1 is fixed to the front end member 133 . The nut B3 is fixed to a first moving member 151, which will be described later. Rotation of the screw shaft B2 causes the nut B3 to move forward and backward, thereby moving the first moving member 151 to which the nut B3 is attached forward and backward.

The second rail portion 140 includes a rail member 141, a rear end member 142, and a front end member 143, and supports the right portion of the Y bar portion 150 so as to be movable in the front-rear direction. The structure of the second rail portion 140 differs from that of the first rail portion 130 in that the drive mechanism B is not provided and the rail member 141 does not have a rail corresponding to the second rail 131C. It is the same as the 1-rail portion 130 (however, it has a symmetrical structure). The rail member 141 includes a rail member main body 141A (corresponding to the rail member main body 131A), a rail 141B (corresponding to the first rail 131B), and a flange 141D (corresponding to the flange 131D). A detailed description of the second rail portion 140 such as the rail member 141 conforms to that of the first rail portion 130 (considered left-right symmetrical).

The Y bar portion 150 is supported by the first rail portion 130 and the second rail portion 140 so as to be movable in the front-rear direction, and is movable in the front-rear direction (sub-scanning direction) by the driving mechanism B. The driving mechanism B may also be provided in the second rail portion 140, and the Y bar portion 150 may be moved in the front-rear direction by synchronizing the driving mechanisms B on both the left and right sides. The Y-bar portion 150 includes a first moving member 151, a second moving member 152, a Y-bar 153, a first Y-bar supporting portion 154, a second Y-bar supporting portion 155, and a driving belt 156. move forward and backward together.

The first moving member 151 moves on the rail member 131 (more specifically, the first rail 131B and the second rail 131C) of the first rail portion 130 . The first moving member 151 includes a moving member main body 151A and wheels 151B to 151E.

A plurality of (for example, two) wheels 151B to 151E are rotatably fixed to the moving member main body 151A. Each of the wheels 151B-151E is made up of, for example, ball bearings. Further, a nut B3 is fixed to the moving member main body 151A.

The plurality of wheels 151B and the plurality of wheels 151C are arranged side by side in the front-rear direction. A plurality of wheels 151B and a plurality of wheels 151C are provided with a rotation axis along the left-right direction. The plurality of wheels 151B enter recesses provided on the top surface of the first rail 131B, rest on the bottom surface of the recesses, and can roll on the first rails 131B (the bottom surface of the recesses). The plurality of wheels 151C enter recesses provided on the lower surface of the first rail 131B. The plurality of wheels 151C mainly has a function of preventing the first moving member 151 from coming off in the left direction, and each wheel 151C and the bottom surface of the recess provided on the lower surface of the first rail 131B are slightly interval (play) is provided. In addition, you may not provide play|play.

The plurality of wheels 151D and the plurality of wheels 151E are arranged side by side in the front-rear direction. The plurality of wheels 151D and the plurality of wheels 151E are provided with their rotating shafts extending in the vertical direction. A plurality of wheels 151D enter recesses provided on the left surface of the second rail 131C. The plurality of wheels 151E enter recesses provided on the right surface of the second rail 131C. The plurality of wheels 151D and the plurality of wheels 151E are in contact with the bottom surface of each recess, pinch the second rail 131C, and can roll on the second rail 131C (bottom surface of each recess).

The second moving member 152 moves on the rail member 141 (more specifically, rail 141B) of the second rail portion 140 . The structure of the second moving member 152 is the same as that of the first moving member 151 except that it does not have wheels corresponding to the plurality of wheels 151D and the plurality of wheels 151E (however, the structure is symmetrical). The second moving member 152 includes a moving member main body 152A (corresponding to the moving member main body 151A) and wheels 152B-152C (corresponding to the wheels 151B-151C). A detailed description of the second moving member 152 conforms to that of the first moving member 151 (considered bilaterally symmetrically).

The plurality of wheels 151B of the first moving member 151 roll on the bottom surface of the concave portion of the first rail 131B of the first rail portion 130, thereby allowing the first moving member 151 to move in the front-rear direction. The plurality of wheels 152B of the second moving member 152 roll on the bottom surface of the recess of the rail 141B of the second rail portion 140, thereby allowing the second moving member 152 to move in the front-rear direction. A plurality of wheels 151B and a plurality of wheels 151C sandwich the first rail 131B from both sides in the vertical direction, thereby restricting the movement of the first moving member 151 in the vertical direction. Specifically, the first moving member 151 can move vertically by the amount of play between the wheel 151C and the first rail 131B, but cannot move vertically any more. A plurality of wheels 152B and a plurality of wheels 152C sandwich the rail 141B from both sides in the vertical direction, thereby restricting the movement of the first moving member 151 in the vertical direction. Specifically, the second moving member 152 can move slightly in the vertical direction due to the play between the wheel 152C and the rail 141B, but cannot move in the vertical direction any more. Since the Y bar portion 150 including the first moving member 151 and the second moving member 152 is heavy, it normally does not move upward due to its own weight. Therefore, the vertical movement of the first moving member 151 and the second moving member 152 is substantially restricted (prohibited). Furthermore, the lateral movement of the first moving member 151 is restricted by the plurality of wheels 151D and the plurality of wheels 151E sandwiching the second rail 131C. With the configuration described above, vertical and horizontal movement of the Y bar portion 150 is restricted. In other words, the rails or rail members 131 and 141 (a pair of rail members) guide the movement of the Y bar portion 150 in the front-rear direction.

As described above, the nut B3 of the drive mechanism B is fixed to the moving member main body 151A of the first moving member 151, and the Y bar portion 150 including the first moving member 151 is movable in the front-rear direction. The Y bar portion 150 is moved in the front-rear direction by the driving mechanism B. As shown in FIG.

Y bar 153 is a rod-shaped member. A carriage 170 on which an inkjet head 160 is mounted is attached to the Y bar 153 so as to be slidable in the horizontal direction. That is, the Y bar 153 supports the carriage 170 so as to be movable in the left and right direction, and guides the movement of the carriage 170 in the left and right direction. The Y bar 153 is supported by a first Y bar support portion 154 and a second Y bar support portion 155 .

The first Y bar support portion 154 supports the left end of the Y bar 153 . The first Y bar support portion 154 is fixed to the first moving member 151 . The first Y-bar support portion 154 includes therein a driven pulley (not shown) around which a drive belt 156 is wound.

The second Y bar support portion 155 supports the right end of the Y bar 153 . The second Y bar support portion 155 is fixed to the second moving member 152 . The second Y-bar support portion 155 includes therein a drive pulley (not shown) around which the drive belt 156 is wound, and a motor that drives the drive pulley.

A drive belt 156 is wound around the driven pulley and the drive pulley. A carriage 170 on which an inkjet head 160 is mounted is fixed to the drive belt 156 . By rotating the drive pulley with the motor, the drive belt 156 is rotated, and the carriage 170 can be guided by the Y bar 153 and moved in the horizontal direction.

The inkjet head 160 is mounted on the carriage 170 . The inkjet head 160 ejects various inks (for example, CMYK color inks) by an inkjet method. As described above, the Y bar portion 150 is guided and supported by the rail members 131 and 141 to move in the front-rear direction. and 141 guide and support movement in the front-rear direction.

The inkjet printer 100 includes an ink supply mechanism (not shown) that supplies ink to the inkjet head 160 in addition to the above components. In addition, inkjet printer 100 also includes a controller (not shown) that controls the operation of inkjet printer 100 . A controller (composed of a computer or the like) controls the motor B1 to move the Y bar portion 150 in the front-rear direction, and controls the drive pulley to move the inkjet head 160 mounted on the carriage 170 in the left-right direction. Perform drive control to move. That is, the controller can move the inkjet head 160 with respect to the medium M in the front, rear, left, and right directions. The controller also controls ejection of ink from the inkjet head 160 . The controller prints an image on the medium M by controlling the ejection of ink while moving the inkjet head 160 back and forth and right and left with respect to the medium M. FIG.

(Structure of platen 110)
The platen 110 includes a honeycomb structure 111, a frame 112, a top plate 113, and a bottom plate 114, as shown in FIG.

The honeycomb structure 111 includes a plurality of hexagonal columnar through holes 111A penetrating vertically. The vertical direction is also a direction perpendicular to the surface of the platen 110 (the mounting surface on which the medium M is mounted). The honeycomb structure 111 is an assembly of a plurality of cylindrical bodies each having a regular hexagonal cross section and extending in the vertical direction. It can also be said that it is a set that is a combination. The frame 112 is a member that constitutes the frame of the platen 110 and is formed in a rectangular shape that surrounds the honeycomb structure 111 . The frame 112 is fixed to the honeycomb structure 111 . For example, the frame 112 may be fixed to the honeycomb structure 111 by being integrally formed with the honeycomb structure 111 from a material such as metal or synthetic resin. Alternatively, the frame 112 and the honeycomb structure 111 may be formed separately (the same material or different materials may be used), and the separately formed frame 112 may be entirely adhered to the outer peripheral portion of the honeycomb structure 111 or screwed. etc. may be fixed.

The frame body 112 is formed to be thicker than the thickness of the cylinder constituting the honeycomb structure 111 and the thickness of the wall defining the through holes 111A in the honeycomb structure 111 when viewed from above. Furthermore, the outer peripheral surface and the bottom surface (surfaces to which the rail members 131 and 141 are fixed) of the frame 112 are improved in dimensional accuracy (particularly flatness) by appropriate surface processing or the like.

The honeycomb structure 111 has high structural rigidity (in particular, higher rigidity than the rail members 131 and 141), and is subject to distortion (for example, due to its own weight, both front and rear end portions, front end portion, rear end portion, or central portion in the front and rear direction). The structure is such that it is difficult for the core to bend downward due to gravity. Therefore, the frame body 112 fixed to the honeycomb structure 111 is also reinforced by the honeycomb structure 111, so that the distortion described above is unlikely to occur (including the case where it does not occur; hereinafter, the same applies to distortion). . The frame 112 has a shape obtained by combining square prism-shaped members in a square shape.

A plurality of screws N1 and a plurality of screws N2 arranged in the front-rear direction are screwed into the frame 112 (they are screwed into screw holes provided in the frame 112), and the screwing causes the first screws N1 and N2 to be screwed together. A rail member 131 of the rail portion 130 is fastened and fixed. The rail member 131 is fastened and fixed to the side surface (left surface) of the frame 112 by the screw N1, and the rail member 131 is fastened and fixed to the bottom surface of the frame 112 by the screw N2. Further, a plurality of screws N3 and a plurality of screws N4 arranged in the front-rear direction are screwed into the frame 112 (screwed into screw holes provided in the frame 112). A rail member 141 of the second rail portion 140 is fastened and fixed. The rail member 141 is fastened and fixed to the side surface (right surface) of the frame 112 by the screw N3, and the rail member 141 is fastened and fixed to the bottom surface of the frame 112 by the screw N4. Incidentally, the screws N1 to N4 may fasten and fix the rail member 131 or 141 via washers.

In this embodiment, the rail members 131 and 141 are elongated in the front-rear direction and have a shape extending linearly as a whole, so that they are distorted. For example, due to the weight of the rail member 131, the front and rear ends, the front end, the rear end, or the front and rear central portion of the rail member 131 are lowered by gravity, and the rail member 131 as a whole is curved in an arched shape. 131 is distorted due to torsion (the same applies to the rail member 141). Therefore, in this embodiment, the rail members 131 and 141 are reinforced by the highly rigid frame 112 (the honeycomb structure 111) by using a plurality of screws N1 to N4 arranged in the front-rear direction. These distortions are corrected by fixing to a frame 112) that is resistant to distortion.

The top plate 113 and the bottom plate 114 are flat plates, are arranged above or below the honeycomb structure 111 , and block the through holes 111 A of the honeycomb structure 111 . Each outer peripheral edge of the top plate 113 and the bottom plate 114 reaches the upper surface or the lower surface of the frame 112 and is fixed to the frame 112 by fasteners such as screws (not shown). When viewed from above, the outer shape of the top plate 113 and the outer shape of the frame 112 are the same. On the other hand, the lower surface of the frame 112 is provided with a step such that the inside when viewed from below is the lower step, and the bottom plate 114 is positioned by this step.

(Effects of this embodiment)
As described above, in the inkjet printer 100, the rail members 131 and 141, which are extruded and tend to be distorted, are reinforced by the honeycomb structure 111 (the frame 112 is reinforced by the honeycomb structure 111). Since the distortion of the rail members 131 and 141 is corrected by fixing them to the frame 112 which is less likely to be distorted than the rail members 131 and 141, the distortion can be corrected without preparing a member other than the platen 110. . Therefore, the distortion can be efficiently prevented. If the honeycomb structure 111 and the frame 112 are not distorted, the correction prevents the rail members 131 and 141 from being distorted. In addition, when the rail members 131 and 141 are distorted, the printing accuracy and the like deteriorate, but by correcting the distortion, the deterioration of the printing accuracy and the like can be prevented.

As described above, the frame body 112 is thicker (thicker) than the thickness of the cylindrical body constituting the honeycomb structure 111 and the thickness of the wall defining the through hole 111A in the honeycomb structure 111 when viewed from above. Rail members 131 and 141 are fastened and fixed to the frame 112 by screws N1 and N3. When the rail members 131 and 141 are directly fixed to the honeycomb structure 111 by the screws N1 and N3, since the outer peripheral wall constituting the honeycomb structure 111 is thin (especially because it is thinner than the screws N1 and N3), it is difficult to fix the rail members 131 and 141 directly. Although the strength is low, by fixing the rail members 131 and 141 to the thick frame 112 with the screws N1 and N3, the rail members 131 and 141 can be fixed more firmly than the direct fixing. Further, since the frame 112 is thick, it is possible to provide screw holes for screwing the screws N2 and N4 on the bottom surface of the frame 112 (in other words, the rail members 131 and 141 are fixed on the bottom surface of the frame 112). can). With these configurations, the rail members 131 and 141 can be firmly fixed to the frame 112, and the distortion of the rail members 131 and 141 can be effectively corrected.

Some conventional inkjet printers have rail members and a platen arranged on a predetermined thick plate-shaped support member (stage, etc.). The support member must be of a rigid construction, which increases the cost of the support member and the manufacturing cost of the ink jet printer. The ink jet printer 100 does not require the supporting member, and the manufacturing cost is reduced.

Since the rail members 131 and 141 are extruded products as described above, they are more easily distorted than cut products. On the other hand, since the frame 112 fixing the rail members 131 and 141 is reinforced by the honeycomb structure 111 , the distortion of the rail members 131 and 141 is corrected by fixing them to the frame 112 . Furthermore, the outer peripheral surface and the bottom surface of the frame 112 are improved in dimensional accuracy (flatness, etc.) by surface processing or the like, and the rail member 131 and the rail member 141 are placed along (for example, in close contact with) thereon, so that the rail Distortion (particularly twisting) of the member 131 and the rail member 141 is corrected. In this way, the fixing destinations of the rail members 131 and 141 are reinforced by the honeycomb structure 111, and the dimensional accuracy of the fixed surfaces is high, so that the distortion of the rail members 131 and 141 can be effectively corrected. It is

Furthermore, by adopting the honeycomb structure 111, the weight of the platen 110 is reduced while ensuring rigidity. If the honeycomb structure 111 were not adopted, the platen 110 would have a thick plate shape. Problems such as an increase in the total weight and an increase in the number of parts arise. By adopting the honeycomb structure 111 for the platen 110 as described above, it is possible to reduce the weight while ensuring the rigidity.

As described above, each of the rail members 131 and 141 is fixed to the frame 112 by means of fasteners (screws N1 to N4) at three or more locations. Distortion can be effectively corrected. In particular, it is possible to effectively prevent the distortion of the rail members 131 and 141 by widening the intervals between the plurality of fasteners.

As described above, since the rail members 131 and 141 are fixed to the side and bottom surfaces of the frame 112, the rail members 131 and 141 are firmly fixed to the frame 112. Distortion of the member 131 and the rail member 141 can be effectively corrected.

(Modification)
The present invention is not limited to the above embodiments. Various modifications may be applied to the above embodiment. Modifications will be exemplified below, and at least part of each modification may be combined.

(Modification 1)
The present invention includes a mounting portion (platen 110 in the above description) on which a workpiece (medium M in the above description) is placed, and a processing head (in the above description) that processes the workpiece placed on the mounting portion. , inkjet head 160) and a guide member (the rail member 131 and the rail member 141 in the above description) that guides the movement of the processing head. For example, the present invention can be applied to a cutting device (including a cutting plotter) for cutting (for example, forming perforations, half-cutting, cutting, etc.) an object to be cut (sheet-shaped media, etc.) as a workpiece. may apply. In this case, instead of the platen 110, the placement section becomes a stage on which the object to be cut is placed, and the processing head becomes a cutter head having a cutter that cuts the object to be cut instead of the inkjet head. The processing apparatus may include both a cutter head and an inkjet head as processing heads.

(Modification 2)
The frame 112 alone may have a rigidity that makes it difficult for distortion to occur as described above (in particular, a rigidity that makes distortion less likely to occur than the rail members 131 and 141). With such a frame 112, each distortion of the rail members 131 and 141 can be effectively corrected.

(Modification 3)
The rail members 131 and 141 may be directly fixed to the honeycomb structure 111 without providing the frame 112 (distortion of the rail members 131 and 141 is corrected by the honeycomb structure 111). Moreover, a thick portion such as the frame 112 may be provided only between the honeycomb structure 111 and the rail member 131 or the rail member 141 . That is, a pair of rod-shaped members from which the portion extending in the left-right direction of the frame 112 is eliminated are arranged between the honeycomb structure 111 and the rail member 131 and between the honeycomb structure 111 and the rail member 141, respectively. good too.

(Modification 4)
The honeycomb structure 111 may be another structure. The structure may have a plurality of spaces (through holes 111A, etc.) inside. This makes the platen 110 lighter. For example, a structure having a plurality of internal spaces may be formed by a collection of cylinders having a square, triangular, pentagonal, circular cross section, or the like. The plurality of through-holes may extend along a direction other than the vertical direction (the direction orthogonal to the surface of the platen 110), for example, the direction orthogonal to the vertical direction (for example, the front-rear direction or the left-right direction). For example, as the other structure, a structure in which a through-hole or a cylindrical body forming the through-hole extends in a direction other than the vertical direction (for example, a honeycomb structure in which the through-hole extends in the left-right direction or the front-rear direction). may be adopted. Further, as another structure, a combination of a plurality of hollow structures may be employed. As the plurality of structures, rectangular parallelepipeds, cubes, diamond structures, prisms such as triangular prisms, and pyramids such as triangular pyramids may be employed. Further, the platen 110 may have a structure capable of sucking the medium M (for example, a structure in which the top plate 113 is provided with a suction port). For example, there may be a combination of an intermediate structure, an upper panel, and a lower panel disclosed in US Pat. The space includes a space communicating with the outside of the structure.

(Modification 5)
Only one of the rail member 131 and the rail member 141 may be fixed to the frame 112 . The rail members 131 and 141 may be fixed to at least one of the top surface, side surface, and bottom surface of the frame 112 . The frame 112 may have a cavity for weight reduction or the like.

(Modification 6)
The first moving member 151 may slide on the rails of the rail member 131 instead of wheels. The second moving member 152 is also the same.

(Modification 7)
Various members such as the rail member 131 and the rail member 141 may be composed of a plurality of members (parts). Also, the rail members 131 and 141 may have any appropriate shape as long as the shape corrects the distortion. The shape of other members may also be changed as appropriate.

REFERENCE SIGNS LIST 100 inkjet printer 110 platen 111 honeycomb structure 112 frame 113 top plate 114 bottom plate 120 leg portion 130 first rail portion 131 rail member 131A rail member body 131B first rail 131C second rail 131D flange 140 second rail portion 141 rail member 141A Rail member main body 141B Rail 141D Flange 150 Y bar portion 151 First moving member 151A Moving member main body 151B to 151E Wheel 152 Second moving member 152A Moving member main body 152B to 152E Wheel 153 Y bar 154 First Y bar support portion 155 Second Y Bar support 156 Drive belt 160 Inkjet head 170 Carriage N1 to N4 Screw B Drive mechanism B1 Motor B2 Screw shaft B3 Nut

Claims (5)

a top plate on which a workpiece is placed ; a bottom plate disposed below the top plate; A placement section comprising a frame fixed to the
a processing head for processing the workpiece mounted on the mounting portion;
and a guide member that guides movement of the processing head,
The placing section has a partition wall between the top plate and the bottom plate, and has a plurality of spaces inside by the front partition wall,
The partition wall extends in a direction orthogonal to the upper surface of the top plate on which the workpiece is placed,
The guide member includes a rail member used to move the processing head,
The rail member is attached to the frame,
The frame has higher rigidity than the rail member,
processing equipment. The plurality of spaces are formed by a honeycomb structure,
The processing apparatus according to claim 1. The mounting portion has an outer peripheral portion that is thicker than the walls that divide the plurality of spaces when viewed from above,
The guide member is fastened and fixed to the outer peripheral portion by a fastener that screws together with the outer peripheral portion.
The processing apparatus according to claim 1 or 2. The guide member is an extruded product,
The processing apparatus according to any one of claims 1 to 3. The guide member is fixed to the placement section by fasteners at three or more locations,
The processing apparatus according to any one of claims 1 to 4.

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