JP5745004B2 - Article conveying apparatus and machine tool - Google Patents

Description

  The present invention relates to an article conveying apparatus capable of efficiently conveying an article in a state where the article is positioned as required, and the workpiece is efficiently conveyed in a state where the workpiece is positioned as required. The present invention relates to a machine tool that can be machined and contributes to productivity improvement.

  In the patent document 1, the present applicant has a double-row movable table that contributes to productivity improvement by enabling safe and efficient attachment / detachment of a workpiece to / from a table even when machining is continued. Provided a machine tool. As shown in FIG. 59, in the machine tool a, the double row table b is movable in the left-right direction on the bed c, and the spindle head d is moved back and forth with respect to the stationary double row table b. It was configured to move in the direction. The double row table b is composed of a front table b1 and a rear table b2 arranged in parallel in the front-rear direction, and both the front table b1 and the rear table b2 can attach workpieces to the upper surface portions e and f. The position can be independently moved left and right, and the position is fixed in a state of being close to the left end side or the right end side.

  Therefore, when using such a machine tool a, the front table b1 and the rear table b2 for holding the processed workpiece are moved to the left end side g or the right end side h as shown in FIG. The workpiece could be attached to and detached from the table in the fixed state. Then, when a new workpiece was attached, machining of the workpiece on the other table was completed, and machining for the new workpiece could be started. Therefore, when the machine tool a is used, there is an advantage that the work can be efficiently attached to and detached from the table and the productivity can be improved.

  However, when using the machine tool a, as described above, the table for holding the finished workpiece is moved to the left end side g or the right end side h as shown in FIG. Therefore, the operator who attaches / detaches the work is forced to attach / detach the work to / from the table that is close to the left end side g or the right end side h, and the front table b1. And the rear table b2 are arranged in parallel in the front-rear direction, it is necessary to attach and detach the workpiece at the front position j of the front table b1 with respect to the front table b1, and with respect to the rear table b2 It was necessary to attach and detach the workpiece at the rear position k of the rear table b2. For this reason, the reciprocating distance of the worker required for attaching and detaching the workpiece is long, and the movement of the worker is wasted, such as the need to move the table from the front side to the rear side or vice versa. There was a problem of poor work efficiency.

Japanese Patent Laid-Open No. 3-196931

  The present invention has been developed in view of the above-mentioned conventional problems, and comprises a transport table for attaching and detaching an article with two transport tables arranged side by side and capable of moving back and forth. Basically, it is an object of the present invention to provide an article transport apparatus that can efficiently perform the work of attaching / detaching an article to / from the transport table and contribute to improving the productivity, and also contributing to improving the safety of the work of attaching / detaching the article. is there. In addition, by applying the configuration of the main part of the article conveying device, it is possible to efficiently perform the work of attaching / detaching the work to / from the carrying table, contributing to productivity improvement, and improving the safety of work attaching / detaching work. The issue is to provide machine tools that contribute.

In order to solve the above problems, the present invention employs the following means.
That is, in the first aspect of the article transporting apparatus according to the present invention, two transport tables that can reciprocate in the front-rear direction are arranged side by side as viewed in the left-right direction orthogonal to the front-rear direction, and are selected. A transport frame for transporting an article placed on the transport table from the article introduction side to the article processing unit is provided, and each of the two transport tables has a retracted position and a forward position. In addition to being able to move in the front-rear direction between the two positions, the front-rear movement of the two transport tables is alternately performed. A movable overhanging member having an up-and-down pressing means is provided, and one of the transport tables in the forward position is on the column member side of the transport frame located on the article introduction side Direction In the introduced state, the conveyance frame is movable together with the conveyance table toward the article processing unit, and the movable projecting member is in the forward position. A base position where the lifting / lowering pressing means can press the article on the transport table toward the table upper surface of the transport table, and the lifting / lowering pressing means presses the article on the transport table in the retracted position toward the table upper surface. It is possible to move in the front-rear direction between the overhanging positions that can be formed.

  In the second aspect of the article transporting apparatus according to the present invention, the two transport tables that can reciprocate in the front-rear direction are arranged side by side as viewed in the left-right direction orthogonal to the front-rear direction, and are selected. A conveyance gate-shaped frame for conveying an article placed on the conveyance table from the article introduction side to the article processing unit is disposed, and each of the two conveyance tables has a retracted position and a forward position. The front and rear movements of the two transport tables can be performed alternately, and the transport portal frame is spaced apart by a required interval in the left-right direction. A left and right support column member is provided, and a movable overhang member is provided that includes an elevating and pressing means that can move the pressing portion up and down so as to connect the upper portions of the left and right support column members. In addition, any one of the transfer tables at the forward position is introduced between the left and right support members of the transfer portal frame positioned on the article introduction side. In this state, the conveyance portal frame can be moved together with the conveyance table toward the article processing unit. The movable projecting member includes a base position at which the lifting / lowering pressing means can press an article on the transport table in the forward position toward the table upper surface of the transport table, and on the transport table in the retracted position. It is characterized in that the article can be moved in the front-rear direction between the protruding position where the lifting / lowering pressing means can press the article toward the upper surface of the table.

  According to a third aspect of the article conveying apparatus of the present invention, in the article conveying apparatus according to the second aspect, the conveying table exhibits the retracted position and the article is positioned and placed on the upper surface of the table as required. In this state, the movable projecting member exhibits the projecting position, and the pressing unit descends at the projecting position, and the pressing unit temporarily presses the article on the transport table toward the upper surface of the table. In the temporary clamped state, the transport table and the movable overhanging member can be moved in the forward direction synchronously, and the movable overhanging member returns to the base position when the movable overhanging member returns to the base position. The transfer table is configured to exhibit the advance position. Then, the main clamp in which the lifting and pressing means presses the article on the transport table with the main clamp pressing force that is equal to or larger than the temporary clamp pressing force in the state where the forward position is exhibited. In addition, the conveyance table on which the article is placed and the conveyance portal frame are integrally moved toward the article processing unit in the main clamp state, and the article is moved. After the required processing of the article in the processing section is completed, the conveyance gate frame is returned to the article introduction side together with the conveyance table, and then the conveyance table is returned to the retracted position. Further, an article is positioned and placed on the upper surface of a transport table different from the transport table and is temporarily clamped by the lifting and pressing means, and the separate transport table moves forward and moves forward. In the state where the forward movement position is exhibited, the another conveyance table is introduced between the left and right support members of the conveyance portal frame located on the introduction side, and thereafter The elevating and pressing means is configured to exhibit the main clamp state, and in the main clamp state, the movement toward the article processing unit and the required processing of the article in the article processing unit are performed. In addition, after the required processing of the article in the article processing unit is completed, the conveyance portal frame is returned to the article introduction side together with the conveyance table, and thereafter It is characterized in that the conveying table has been made as returns to the retracted position.

According to a fourth aspect of the article conveying apparatus of the present invention, in the article conveying apparatus according to the second aspect, the conveying table exhibits the retracted position, and the article is positioned and placed on the upper surface of the table as required. In this state, the movable projecting member exhibits the projecting position, and the pressing unit descends at the projecting position, and the pressing unit temporarily presses the article on the transport table toward the upper surface of the table. In this temporary clamping state, the transport table and the movable overhanging member can move in a forward direction synchronously, and the movable overhanging member returns to the base position when the movable overhanging member returns to the base position. The transfer table is configured to exhibit the advance position. Then, the main clamp in which the lifting and pressing means presses the article on the transport table with the main clamp pressing force that is equal to or larger than the temporary clamp pressing force in the state where the forward position is exhibited. In addition, the conveyance table on which the article is placed and the conveyance portal frame are integrally moved toward the article processing section in the main clamp state. In addition, after the required processing of the article in the article processing section is completed, the conveyance portal frame is returned to the article introduction side together with the conveyance table. In the temporary clamp state, the transport table and the movable overhanging member are moved backward in synchronization, and the transport table is in the retracted position. When the pressing means is lifted and the temporary clamp state is released, and in the released state and the movable overhanging member is in the overhanging position, the conveyance portal frame moves as required in the left-right direction and stops. made as exhibiting a state, thus in the stop state, the transfer table mounted article is positioned on a separate conveyor table is the pressing portion downward and In this temporary clamping state, the transfer table and the movable overhanging member can move in a forward direction synchronously, and when the movable overhanging member returns to the base position, the transfer table In such a way that the transfer table is introduced between the left and right support members of the transfer portal frame located on the article introduction side. In addition, the elevating and pressing means is configured to exhibit the main clamp state, and in the main clamp state, the movement toward the article processing unit and the required processing of the article in the article processing unit are performed. In addition, the conveyance gate frame returns to the article introduction side together with the conveyance table, and then the conveyance table returns to the retracted position. And it is characterized in that they are.

  According to a fifth aspect of the article conveying apparatus of the present invention, in the article conveying apparatus according to the first, second, third, and fourth aspects, the two conveying tables are arranged on the left and right sides with the longitudinal drive device interposed therebetween. The left and right engagement connection portions are provided so as to protrude from the left and right drive side surface portions of the longitudinal drive device, and the left and right engagement connection portions are connected to the left and right drive connection portions. It is possible to engage with an engagement connected portion provided on a side surface of the transport table that faces the drive side surface portion, and the engagement connection portion and the engagement connected portion are in an engaged state. In the connected state, the engagement connecting portion can move forward or backward in synchronization with the movable projecting member.

  A sixth aspect of the article conveying apparatus according to the present invention is the article conveying apparatus according to the first, second, third, and fourth aspects, wherein the movable overhanging member is provided for each of the left and right conveying tables. There is provided an engaging and fixing member that is coupled to the secured portion that is engaged and is released when the engaged state is released, and the movable projecting member is connected to the base. In the state of being in the position and in the state of being in the overhanging position, the engaging and securing member can be connected in an engaged state to the secured portion of the transport table in the forward or backward position. In addition, the engagement state is released and the connection is disengaged, and when the engagement securing member is coupled to the secured portion, the longitudinal direction of the movable projecting member The transport table is moved by the That are adapted to move in synchronism with out member is characterized in.

  According to a seventh aspect of the article conveying apparatus of the present invention, in the article conveying apparatus according to the first, second, third, and fourth aspects, the movable projecting member is provided for each of the left and right conveying tables. An engaging and securing member that is connected to the adherend to be secured in an engaged state and is disengaged when the engaged state is released is provided so as to be movable up and down. In the base position and the overhanging position, the engaging and securing member can be in a lowered state, and in the lowered state, the engaging and securing member is in the advanced position or In the engaged state, the engaging and fixing member can be connected to the secured portion of the transport table in the retracted position while the engaged state is released and the connection is released. The engagement securing portion is configured to exhibit an elevated state. Is connected to the adherend, and the transport table is moved in synchronization with the movable projecting member by the movement of the movable projecting member in the front-rear direction. Is.

  An eighth aspect of the article conveying apparatus according to the present invention is the article conveying apparatus according to the seventh aspect, wherein the engagement fixing member is provided on the movable projecting member and can be expanded and contracted in the vertical direction. It is attached to a sticking cylinder that can move up and down in accordance with the expansion and contraction of the lifting cylinder, and is attached to a sticking cylinder whose vertical line is in the vertical direction, and extends in the vertical direction inside the sticking cylinder. The pivot shaft is inserted, and the pivot shaft can be rotated in the forward and reverse directions. The lower end portion of the pivot shaft is suspended from the respective front edge portions of the left and right transport tables. An engaging and fixing member provided with a fitting recess for fitting an engaging shaft as a fitting portion is fixed, and the holding cylinder is lowered by extension of the elevating cylinder. When the rotation shaft rotates in the positive direction, the insertion recess The engagement shaft is fitted to the engagement fixing member and the engagement shaft are connected to each other in an engaged state, while the rotating shaft rotates in the opposite direction in the lowered state, The engagement shaft is disengaged from the fitting recess, and the lifting cylinder is reduced and the attachment cylinder is raised in a state where the engagement and securing member and the engagement shaft are disengaged. In this way, the engagement fixing member is raised.

  In a first aspect of the machine tool according to the present invention, two transfer tables that can reciprocate in the front-rear direction are arranged side by side as viewed in the left-right direction orthogonal to the front-rear direction, and the selected A transport frame for transporting a work placed on the transport table from the work introduction side to the machining section, and the two transport tables are respectively set to a retreat position and a forward position. The front and rear movements of the two transport tables are alternately performed, and the transport frame is configured such that the pressing portion can move up and down on the upper part of the support member. A movable overhanging member having an elevating and pressing means is provided, and any one of the transfer tables in the state of the advance position is the support column of the transfer frame located on the workpiece introduction side In the introduced state, the conveying frame is movable together with the conveying table toward the machining portion, and the movable overhanging member is A base position where the lifting / lowering pressing means can press the workpiece on the transfer table in the forward position toward the table upper surface of the transfer table, and the workpiece on the transfer table in the retracted position toward the table upper surface. It is characterized in that it can be moved in the front-rear direction between the overhanging positions where the lifting and pressing means can press.

  In a second aspect of the machine tool according to the present invention, two transfer tables capable of reciprocating in the front-rear direction are disposed side by side as viewed in the left-right direction orthogonal to the front-rear direction, and the selected A transfer gate-shaped frame for transferring a workpiece placed on the transfer table from the workpiece introduction side to the machining section is disposed. Each of the two transfer tables has a retracted position and a forward position. The front and rear movements of the two transport tables can be performed alternately, and the transport portal frame is spaced apart by a required interval in the left-right direction. A left and right support column member is provided, and a movable overhang member is provided that includes an elevating and pressing means that can move the pressing portion up and down so as to connect the upper portions of the left and right support column members. In addition, any one of the transfer tables in the state of the advance position is introduced between the left and right support members of the transfer portal frame located on the workpiece introduction side. In the introduced state, the transfer gate-shaped frame is movable together with the transfer table toward the machining section. In addition, the movable projecting member includes a base position at which the lifting / lowering pressing means can press the work on the transport table in the forward position toward the table upper surface of the transport table, and the transport table on the transport table in the retracted position. The workpiece can be moved in the front-rear direction between an overhanging position where the workpiece can be pressed toward the upper surface of the table by the lifting and pressing means.

  A third aspect of the machine tool according to the present invention is the machine tool according to the second aspect, wherein the transfer table is in the retracted position and a workpiece is positioned and placed on the upper surface of the table. The movable overhanging member is configured to exhibit the overhanging position, and the pressing portion is lowered at the overhanging position, and the pressing portion presses the work on the transfer table toward the upper surface of the table with a temporary clamp pressing force. In the temporary clamped state, the transfer table and the movable overhanging member can move in a forward direction synchronously, and the transfer table is returned to the base position when the movable overhanging member returns to the base position. Presents the forward position. Then, in the state where the forward position is exhibited, the lifting and lowering pressing means presses the workpiece on the transfer table with a main clamp pressing force that is equal to or greater than the temporary clamp pressing force. The transfer table on which the workpiece is placed and the transfer gate-shaped frame are moved together toward the machining portion in the main clamp state, and the machine After the required machining of the workpiece in the machining section is completed, the conveyance portal frame returns to the workpiece introduction side together with the conveyance table. Further, after returning to the workpiece introduction side, the conveyance table on which the workpiece is placed is set to the retracted position, and the workpiece is placed on the upper surface of the conveyance table different from the conveyance table. The workpiece is introduced in a state where it is positioned and placed as required and is brought into the temporary clamped state by the elevating and pressing means, and the other transport table is moved forward to exhibit the advanced position. In addition to being introduced between the left and right support members of the transport gate-shaped frame located on the side, the elevating and pressing means is then brought into the main clamp state, and in the main clamp state, the machine The movement toward the machining section and the required machining of the workpiece in the machining section are performed, and after the machining is completed The transfer gantry frame is made as returns to the workpiece inlet side with the conveying table, in which subsequent to the conveying table and characterized in that it is made as returns to the retracted position.

  A fourth aspect of the machine tool according to the present invention is the machine tool according to the second aspect, wherein the transfer table is in the retracted position and a workpiece is positioned and placed on the upper surface of the table. The movable overhanging member is configured to exhibit the overhanging position, and the pressing portion is lowered at the overhanging position, and the pressing portion presses the work on the transfer table toward the upper surface of the table with a temporary clamp pressing force. In the temporary clamped state, the transfer table and the movable overhanging member can move in a forward direction synchronously, and the transfer table is returned to the base position when the movable overhanging member returns to the base position. Exhibiting the forward movement position, and in the state of the forward movement position, the elevating and pressing means moves the article on the transport table to the temporary club. The transport table and the transport are configured such that the main clamp state is pressed with the main clamp pressing force that is equal to or greater than the pressing force, and the article is placed in the main clamp state. The portal frame is integrally moved toward the machined portion. Then, after the required machining of the workpiece in the machining section is completed, the conveyance portal frame is returned to the workpiece introduction side together with the conveyance table in the final clamp state or the temporary clamp state. In this state, the lifting / lowering pressing means is brought into the temporary clamp state, and in the temporary clamp state, the transport table and the movable overhanging member are moved backward in synchronization, and the transport table is In the state where the retracted position is exhibited, the lifting and lowering pressing means is lifted to cancel the temporary clamp state, and in the released state and the movable projecting member exhibits the projecting position, The frame is moved as required in the left-right direction to exhibit a stopped state, and in this stopped state, a transfer table different from the transfer table. The workpiece is positioned and placed on the workpiece so that the pressing portion descends and presents a temporary clamped state, and in the temporary clamped state, the transfer table and the movable overhanging member can move forward in synchronization. When the movable projecting member returns to the base position, the transport table exhibits the advance position, and the transport table is located on the workpiece introduction side in the state of the advance position. In addition to being introduced between the left and right support members of the portal frame, the elevating and pressing means is configured to exhibit the main clamp state, and the movement toward the machining portion in the main clamp state. And the required machining of the workpiece in the machining section is performed, and after the machining is completed, the conveyance portal frame is moved to the conveyance section. Made as returns to the workpiece inlet side with Buru, in which subsequent to the conveying table and characterized in that it is made as returns to the retracted position.

  According to a fifth aspect of the machine tool according to the present invention, in the machine tool according to the first, second, third, and fourth aspects, the two transport tables are arranged side by side with the longitudinal drive device interposed therebetween. Left and right engagement connection portions are provided so as to protrude from the left and right drive side surface portions of the forward / backward drive device, respectively. -It is possible to engage with an engagement connected portion provided on a side surface of the bull facing the drive side surface portion, and the engagement connection portion and the engagement connected portion are connected in an engaged state. In this state, the engagement connecting portion can move forward or backward in synchronization with the movable projecting member.

  According to a sixth aspect of the machine tool of the present invention, in the machine tool according to the first, second, third, and fourth aspects, the movable projecting member is provided in each of the left and right transport tables. An engagement securing member is provided which is coupled to the adherend in an engaged state and is disengaged by releasing the engaged state, and the movable projecting member is at the base position. The engaging and securing member can be connected to the secured portion of the transport table in the advanced position or the retracted position in an engaged state in a certain state and in the extended position. The engagement state is released and the connection is released, and the engagement securing member is connected to the secured portion, and the movable overhanging member in the front-rear direction. The movable table is moved by the movement table And it is characterized in that it is adapted to move synchronously with.

  According to a seventh aspect of the machine tool of the present invention, in the machine tool according to the first, second, third, and fourth aspects, the movable projecting member is provided on each of the left and right transport tables. An engaging and securing member that is connected to the adherend in an engaged state and is disengaged when the engaged state is released is provided so as to be movable up and down. The engaging and fixing member can be in a lowered state in the base position and the overhanging position, and in the lowered state, the engaging and fixing member is in the forward position or the backward position. It is possible to connect to the secured portion of the transport table at the position in an engaged state, and the engaged and secured member is raised in a state where the engaged state is released and the connection is released. And the engagement securing member is The transport table is configured to move in synchronization with the movable overhanging member by moving the movable overhanging member in the front-rear direction in a state where the movable overhanging member is connected to the attachment portion. .

  An eighth aspect of the machine tool according to the present invention is the machine tool according to the first, second, third, and fourth aspects, wherein the engagement fixing member is provided on the movable projecting member and extends and contracts in the vertical direction. It can be moved up and down according to the expansion and contraction of the elevating cylinder by being attached to the rod of the elevating cylinder that can be attached. A rotating shaft extending in the direction is inserted, and the rotating shaft can be rotated in the forward and reverse directions within an angle range of 90 degrees. At the lower end portion of the rotating shaft, each of the left and right transport tables is provided. An engaging and fixing member is provided, which is provided with an insertion recess for receiving an engaging shaft as the attached portion, which hangs down at the front edge portion, and the holding cylinder is extended by extension of the elevating cylinder. The landing tube body is lowered, and in this lowered state, the pivot shaft is moved in the forward direction. By rotating, the engagement shaft fits into the insertion recess and the engagement fixing member and the engagement shaft are connected to each other in an engaged state, while the rotation shaft is in the lowered state. By rotating 90 degrees in the reverse direction, the engagement shaft is disengaged from the fitting recess, and the lifting cylinder is disengaged from the engagement fixing member and the engagement shaft. Is reduced and the adhering cylinder can be raised, whereby the engaging and adhering member is raised.

The present invention has the following excellent effects.
(1) The article conveying apparatus and machine tool according to the present invention are arranged such that two conveying tables that can be reciprocated in the front-rear direction are arranged side by side, and the article is placed on the selected conveying table ( A conveyance gate frame is arranged to convey a workpiece, etc.) from the article introduction side to the article processing section (machining section, etc.). Each of the two conveyance tables has a retracted position and a forward position. It is possible to move between the positions in the front-rear direction and to move back and forth alternately. In addition, a movable overhanging member provided with a lifting and lowering pressing means is movable in the front-rear direction between the base position and the overhanging position in the conveyance portal frame.

  Therefore, according to the present invention, it is possible to continuously and efficiently carry an article such as a workpiece and required machining of the workpiece. In addition, since the transport table for attaching and detaching an article such as a work is constituted by two transport tables arranged side by side on the left and right, the operator who attaches and detaches the article such as a work to and from the transport table The movement can be made linear in the left-right direction, and the movement distance of the worker for the alternate attachment / detachment work of the article with respect to the two transport tables can be made a short distance (for example, about 1 m to 1.5 m). For this reason, waste of the movement of the worker can be eliminated, and productivity can be improved. Further, since the first and second transfer tables can perform attachment / detachment work of an article such as a workpiece in the retracted position, the attachment / detachment work can be performed safely and efficiently in a space opened upward.

(2) In a more preferred aspect of the present invention, when the movable projecting member is in the projecting position, the lifting / lowering pressing unit presses the article on the transport table in the retracted position toward the table upper surface with a temporary clamp pressing force, and thereafter In the temporary clamp state, the transport table and the movable overhanging member can move forward in synchronization, and when the movable overhanging member returns to the base position, the lifting and lowering pressing means is The article is pressed with a main clamp pressing force that is equal to or greater than the temporary clamping pressing force.

  In this way, when the article placed and placed on the upper surface of the table is moved to a temporary clamp state and advanced, the positioned state of the article is conveyed compared to when nothing is clamped. It is possible to avoid the possibility of collapse due to vibration or the like when the table moves forward, and to introduce the article more accurately on the article introduction side. Thereby, the processing accuracy in the article processing unit as the machining unit or the like can be further improved.

  And in this more preferable aspect, since the clamp pressing force in the said overhanging position is set to the temporary clamp pressing force that is a relatively small pressing force, the pressing force is reduced within a range that does not disturb the positioned state of the article. However, the movable projecting member in the projecting state can be hardly subjected to an excessive bending action, and thus the movable projecting member can be hardly damaged.

  Further, at the base position, the main clamp pressing force is applied to the article (workpiece or the like) on the conveyance table, so that the article is stably fixed on the conveyance table while being positioned as required. As a result, the article can be subjected to required processing such as machining in the fixed and stable state.

(3) The article conveying apparatus and the machine tool according to the present invention may be configured such that “the conveying gate-shaped frame moves as required in the left-right direction in a state where the movable projecting member exhibits the projecting position and stops. ”, The processing efficiency of the article can be improved and the machining efficiency of the workpiece can be improved.

(4) The movable overhanging member is provided with an engaging and fixing member that is connected to the bonded portions of the left and right transport tables in an engaged state, and is released from the connected state when the engaged state is released. When the engaging and fixing member is connected to the adherend, the transfer table is moved in synchronization with the movable projecting member by moving the movable projecting member in the front-rear direction. Can do.

  Accordingly, the synchronous movement of the movable overhanging member and the conveyance table in the front-rear direction can be easily achieved without requiring a complicated control circuit or the like, and the manufacturing cost of the article conveyance device or the machine tool can be reduced. It will be.

  In this configuration, when the engaging and fixing member is configured to be movable up and down, the engaging and fixing member exhibits an elevated state when the engagement state is released and the connection is released. In order to obtain, the conveyance portal frame introduces an article on the conveyance table to the article introduction side and performs a necessary process on the article, or moves the workpiece to the workpiece introduction side to It is possible to prevent the engagement and fixing member from becoming an obstacle when performing machining.

  In particular, the engaging and fixing member is attached to a fixing cylinder that can be moved up and down in accordance with the expansion and contraction of an elevating cylinder that is provided on the movable projecting member and can expand and contract in the vertical direction. When the rotation shaft extending in the vertical direction is inserted into the inside of the housing and the rotation shaft can be rotated forward and backward by the rotation operation by the rotation operation portion, the engagement fixing member is moved up and down. A structure that is movable and movable can be made simple and reliable.

1 is a perspective view showing a machine tool according to the present invention. It is a fragmentary perspective view which shows the horizontal frame which comprises the conveyance portal frame of the machine tool. It is explanatory drawing explaining the alternate back-and-forth movement structure of the 1st, 2nd conveyance table. It is a top view which shows the state which positioned and mounted the workpiece | work on the 1st conveyance table. It is a side view explaining the operation | movement which a movable overhanging member moves to the front-back direction between a base position and an overhanging position. It is a side view which shows the process in which a 1st conveyance table transfers to a table support plate from a rail. It is a side view which shows the process in which the 1st conveyance table in a retreat position moves to an advance position in the state by which the workpiece | work was positioned and mounted. It is a side view which shows the state which has a 1st conveyance table in an advance position. It is a top view which shows the state in which the 1st conveyance table was introduced into the workpiece | work introduction side. It is a top view which shows the state by which the workpiece is milled. It is a top view which shows the state which the rotation table rotated 90 degree | times in the workpiece | work mounting state. It is a top view which shows the state which the 1st conveyance table returned to the workpiece | work introduction side after milling was completed. It is a side view which shows the process in which the 1st conveyance table which returned to the workpiece | work introduction side is returned to a retracted position. FIG. 11 is a front view showing a process in which, after the first transport table returns to the retracted position, the pressing portion is raised, and the transport portal frame moves to the workpiece introduction side related to the second transport table in this state. FIG. It is a side view which shows the process in which this 2nd conveyance table moves toward the workpiece | work introduction side. It is a side view which shows the state which pressed the workpiece | work on a 2nd conveyance table with the raising / lowering press means. FIG. It is a top view which shows the state by which the workpiece | work on the 2nd conveyance table is milled. It is a top view which shows the state which the 2nd conveyance table returned to the workpiece | work introduction side. It is a side view which shows the process in which a 2nd conveyance table moves to a backward position from an advance position. FIG. 4 is a front view showing a process in which the pressing portion rises in the retracted position of the second transfer table, and then the transfer portal frame moves to the workpiece introduction side related to the first transfer table while the pressing portion is raised. is there. FIG. It is a side view which shows the state which has a 2nd conveyance table in a retracted position. It is a side view which shows the state which the 2nd conveyance table exhibited the advance position. It is a perspective view which shows the other Example of the machine tool which concerns on this invention. FIG. FIG. It is the front view. FIG. It is a top view which shows the state in which the movable overhang | projection member in the machine tool exists in a base position, and an overhang position. It is a side view explaining the process in which the movable overhang member in a base position moves to an overhang position. It is a side view explaining the process in which a 1st conveyance table transfers to a 2nd rail from a 1st rail. It is a front view explaining the structure which is guided by the rail of the 1st, 2nd conveyance table, and moves back and forth. It is a perspective view which shows the fixing | fixed apparatus with which the engagement fixing member which adheres the 1st and 2nd conveyance table is provided rotatably. It is explanatory drawing explaining the structure which rotates the side view and the rotating shaft. It is a front view which shows the state which the engagement securing member which comprises a securing apparatus descend | falls. It is a front view which shows the state which the engagement fixing member raised. It is a perspective view explaining the effect | action which the engagement fixing member of a fixing device engages with the engagement shaft provided in the 1st, 2nd conveyance table. It is a top view explaining the effect | action. It is a side view which shows the process in which the 1st conveyance table in a retreat position advances with the advance of a movable overhanging member in a state where the engagement fixing member is engaged with the engagement shaft. It is a side view which shows the state which the 1st conveyance table exhibited the advance position. FIG. 10 is a side view showing a state where the engagement and securing member and the engagement shaft are disengaged and the engagement and securing member is raised in a state where the first transport table is in the forward position. It is a top view which shows the state in which this 1st conveyance table was introduced into the workpiece | work introduction side. It is a top view which shows the state by which the workpiece is milled. It is a top view which shows the state which the 1st conveyance table returned to the workpiece | work introduction side after milling was completed. It is a side view showing the process of returning the 1st conveyance table which returned to the work introduction side to a retreat position. FIG. 10 is a front view showing a process in which the pressing portion is raised after the first transfer table returns to the retracted position, and the transfer portal frame moves to the workpiece introduction side related to the second transfer table in this state. . It is a side view which shows the process in which this 2nd conveyance table advances with advance of a movable overhang | projection member in the state which the engagement fixing member and the engagement shaft engaged. It is a side view which shows the state in which the 2nd conveyance table exhibited the advance position. FIG. It is a top view which shows the state by which the workpiece | work on the 2nd conveyance table is milled. It is a top view which shows the state which the 2nd conveyance table returned to the workpiece | work introduction side. It is a side view which shows the process in which a 2nd conveyance table moves to a retreat position from an advance position in the state which the engagement fixing member engaged with the engagement axis | shaft. It is a side view which shows the state which the 2nd conveyance table retracted | retreated with the retreat of a movable overhang | projection member. It is explanatory drawing explaining the conveyance frame which consists of one support | pillar member. It is a front view which shows the state which the raising / lowering press means and the auxiliary | assistant press means are pressing the workpiece | work on a conveyance table. It is a top view which shows the other arrangement | positioning state of a movable positioning device. It is a perspective view which shows the conventional machine tool which provides a double row table. It is a top view explaining the effect | action.

  1 to 5, the article conveying apparatus 1 according to the present invention is applied as a machine tool 1 a, and includes two conveying tables (this book) that can reciprocate in the front-rear direction F <b> 1 with the front-rear drive unit 2 (FIG. 1). In the embodiment, the first transport table 3 and the second transport table 4 are disposed adjacent to each other in the left-right direction F2 orthogonal to the front-rear direction F1, and the selected transport table is used. A transfer gate-shaped frame 9 is arranged to convey the workpiece from the workpiece introduction side 6a, 6b (a kind of article introduction side 6 to be described later) to a machining section 7a (a kind of article processing section 7 to be described later).

  A workpiece W1 (a kind of article W to be described later) is positioned and placed on the first and second transport tables 3 and 4, and the transport portal frame 9 is Guided by a rail 5 extending from the workpiece introduction side 6a toward the machined portion 7a, it can reciprocate in the left-right direction F2. In this embodiment, the workpiece introduction side 6a is an introduction side for introducing the workpiece W1 placed on the first conveyance table 3, and the workpiece introduction side 6b is loaded on the second conveyance table 4. This is an introduction side for introducing the placed work W1. Also, arranging the first conveyance table 3 and the second conveyance table 4 adjacent to each other means that both tables 3 and 4 are arranged adjacent to each other in a state where they are in a retracted position to be described later. Is meant to do.

  The first and second transfer tables 3 and 4 have, for example, a square plate shape in plan view, the four corner portions thereof are cut off, and the front edge portions 3a and 4a extend in the left-right direction. . As shown in FIG. 5, the first and second transfer tables 3 and 4 are guided by the rail 8 between the retracted position 10 and the advanced position 11, respectively, and can move in the front-rear direction F1. The back-and-forth movement is performed alternately. For convenience of explanation, the first and second transfer tables 3 and 4 may be illustrated as having four corners that are not rounded, that is, as a square in plan view.

  In the present embodiment, the first and second transfer tables 3 and 4 have a square plate shape as described above, and the length of one side thereof is set to 750 mm. The center-to-center distance L1 (FIG. 4) in the left-right direction of the transfer tables 3 and 4 is set to about 1100 mm. A relatively large work can be placed on the first and second transfer tables 3 and 4, for example, a work W <b> 1 having an 80 mm square to 800 mm square and a height of up to 230 mm can be placed.

  The selected back-and-forth movement of the first and second transfer tables 3 and 4 is performed by the selective back-and-forth movement drive of the back-and-forth movement drive device 2 (FIG. 1). For example, as shown in FIGS. 3 (A) and 3 (B), the selected forward / backward drive is performed by the left and right drive side portions 200 and 201 of the forward / backward drive device 2 that can be protruded laterally. The connecting portions (for example, configured as shaft portions) 202 and 203 are engaged portions (for example, configured as concave portions) provided on the side surface portions 205 and 206 facing each other of the first and second transport tables 3 and 4. 207, 209) can be selectively connected to the engaged state.

  In this embodiment, as shown in FIG. 1, the transport gate frame 9 has left and right support members 12, 13 that are erected at a required interval in the left-right direction F2 (for example, at an interval of about 1650 mm). The upper portions of the left and right support members 12, 13 are connected to each other by a horizontal horizontal frame 15, and the rear portion of the horizontal frame 15 has a rear end as shown in FIG. An open U-shaped notch 41 is provided. In other words, the left and right strut members 12 and 13 are provided with projecting portions 65 and 66 projecting in directions facing each other in the left and right direction F2 on the upper portions of the left and right strut portions 12a and 13a, respectively. The transport gate frame 9 as a whole has a gate shape in a front view. In the present embodiment, as shown in FIG. 2, the front portions of the left and right overhang portions 65, 66 are connected to each other by a joint portion 34, and the width of the U-shaped notch 41 is Is set to about 160 mm. In the present embodiment, the lower ends 64 and 68 of the left and right support members 12 and 13 are connected to each other by the connecting frame 14. In addition, a disc-shaped rotary table 18 having an indexing device that is forcibly rotated around a vertical axis is provided at the center in the left-right direction of the connection frame 14. A rectangular plate-like table support plate 24 that supports the transfer tables 3 and 4 is fixed.

  Also, as shown in FIG. 1, a lifting / lowering pressing means that can be moved up and down with a pressing portion 16 provided at the lower end so as to connect the left and right protruding portions 65 and 66 (that is, the upper portions of the left and right support members). A movable overhang member 19 having 17 is provided. As shown in FIG. 8, with the movable projecting member 19 in a base position 22 described later, the elevating / lowering pressing means 17 extends in the vertical direction at the U-shaped notch 41 (FIG. 2). ing.

  As shown in FIGS. 5 and 9, one of the first and second transfer tables 3 and 4, for example, the first transfer table 3, which is in the state of the forward movement position 11, is the workpiece. It is configured to be introduced between the left and right support members 12 and 13 of the transport portal frame 9 located on the introduction side 6a (FIG. 1). The introduction of the first and second transfer tables 3 and 4 into the space 30 between the left and right support members 12 and 13 is performed on the side edges 3b and 4b of the first and second transfer tables 3 and 4 (see FIG. The first and second transfer tables 3 and 4 are transferred from the rails 8 and 8 to the table support plate 24 in the state where 1) is directed in the front-rear direction. FIG. 6 shows a state at the start of the transfer.

  In the introduced state, as shown by an arrow in FIG. 9, the transport frame 9 is guided by the rail 5 and moves together with the transport table toward the machining portion 7a. The state of movement to the machined portion 7a is indicated by a one-dot chain line in FIG. In the present embodiment, the machining section 7a is configured with a double-headed milling machine 20 with a built-in numerical control device, and can mill only two opposing surfaces of the workpiece W1 or four circumferential surfaces of the workpiece W1.

  As shown in FIG. 5, the movable overhanging member 19 moves the workpiece W <b> 1 on the first conveyance table 3 in the forward movement position 11 toward the table upper surface 21 of the first conveyance table 3, and the elevation pressing means 17. Can be moved in the back-and-forth direction between a base position 22 that can be pressed and an overhanging position 23 that can be pressed by the lifting and lowering pressing means 17 toward the table upper surface 21 with respect to the work W1 on the transfer table 3 at the retracted position 10. It has been. The movement in the front-rear direction can be performed by a mechanism 31 including a rack and a pinion, for example, as shown in FIG.

  In this embodiment, as shown in FIGS. 1 and 5, the lifting / lowering pressing means 17 is configured such that a pressing rod 26 connected to the lower end of the rod of the hydraulic cylinder 25 can be moved up and down by the expansion and contraction of the hydraulic cylinder 25. The pressing portion 16 connected to the lower end of the pressing rod 26 moves the workpiece W1 mounted on the table upper surface 21 of the first and second transfer tables 3 and 4 to the table upper surface 21. Can be pressed with the required pressing force. The pressing rod 26 can turn around its axis L2 (FIG. 5). In this pressed state, as shown in FIG. 5, the axis L <b> 2 of the pressing rod 26 coincides with the center 42 in plan view of the first table 3. In this embodiment, the magnitude of the pressing force is set to three types, a temporary clamping pressing force, a main clamping pressing force, and a turning clamp pressing force, which will be described later. It is set in the order of clamp pressing force.

  The magnitudes of the temporary clamp pressing force, the turning clamp pressing force, and the main clamping pressing force are illustrated as follows in relation to the material of the workpiece to be machined. When the workpiece is made of iron, the temporary clamp pressing force can be set to about 300 to 500 kgf, the turning clamp pressing force can be set to about 1200 kgf, and the main clamping pressing force can be set to about 3000 to 8000 kgf. When the workpiece is made of aluminum or resin, the temporary clamp pressing force can be set to about 100 kgf, the turning clamp pressing force can be set to about 300 to 400 kgf, and the main clamping pressing force can be set to about 500 to 1500 kgf.

  Hereinafter, the configuration of the machine tool 1a will be described in more detail along with the operation thereof. As shown in FIG. 7, in the state where the first transfer table 3 is in the retracted position 10 and the workpiece W1 is positioned and placed on the table upper surface 21, the movable projecting member 19 is in the projecting position. The position 23 is presented. At the overhang position 23, the pressing portion 16 of the lifting and lowering pressing means 17 is lowered, and the pressing portion 16 presses the workpiece W1 on the transport table 3 toward the table upper surface 21 with a temporary clamp pressing force. A temporary clamp state 27 is obtained. The temporary clamp pressing force is set to about 300 to 500 kgf as described above when the workpiece W1 is made of, for example, iron.

  Here, the procedure for positioning the workpiece W1 placed on the table upper surface 21 will be described with reference to FIGS. In FIG. 1, reference numeral 40 denotes a movable positioning device that can move in the left-right direction F <b> 2, and positioning of the workpiece W <b> 1 on the upper surface 21 of the first transfer table 3 and the table upper surface 21 of the second transfer table 4. It can be performed. The movable positioning device 40 includes an L-shaped positioning piece 31 shown in FIG. 4 at the distal end 33 of a telescopic rod 32 that can expand and contract in the front-rear direction. Then, in accordance with the mounted work W1, the left and right movement amount of the movable positioning device 40 and the front and rear movement amount of the telescopic rod 32 are set as required, and the work W1 is placed in the corner portion 35 of the positioning piece 31. When the corner portion 36 is brought into contact, the center 42 of the workpiece W1 in plan view and the center 43 of the first table 3 (or the second table 4) in plan view can be substantially matched. . Since the movable positioning device 40 moves left and right in this way, one movable positioning is performed to perform the required positioning of the workpiece W1 placed on the table upper surface 21 of the first and second transfer tables 3 and 4. The apparatus 40 can position the workpiece W1 with respect to the first and second transfer tables 3 and 4 with good workability.

  Then, in the temporary clamped state 27, as shown by an arrow in FIG. 7, the first transfer table 3 and the movable overhanging member 19 can advance in synchronization, and as shown in FIG. When returning to the base position 22, as shown in FIGS. 8 to 9, the transfer table 3 is configured to exhibit the advance position 11.

  In the present invention, the workpiece W1 positioned and placed on the table upper surface 21 is advanced in the temporary clamp state 27 as described above, and therefore the state positioned by the movable positioning device 30 is the first transfer table 3. Therefore, the workpiece W1 can be accurately introduced into the workpiece introduction side 6a. Thereby, it is possible to perform highly accurate machining in the machining portion 7a. The clamp pressing force at the overhanging position 23 is set not to the main clamp pressing force but to the temporary clamping pressing force, while the pressing force is reduced within a range that does not disturb the positioned state of the workpiece, This is so that the movable projecting member 19 in the state is not easily damaged by receiving an excessive bending action.

  In a state where the first transfer table 3 exhibits the forward movement position 11, the first transfer table 3 is stably fixed to the turntable 18 by being clamped to the turntable 18. After that, as shown in FIG. 8, the lifting and lowering pressing means 17 exhibits a main clamp state 29 in which the workpiece W1 on the first transfer table 3 is pressed with a main clamp pressing force larger than the temporary clamp pressing force. It is done like this. The main clamp pressing force is set to about 3000 to 8000 kgf. In this way, the workpiece W1 can be stably fixed on the first transfer table 3 by the clamped state 29, and machining can be performed in the fixed and stable state.

  In the main clamp state 29, as indicated by an arrow in FIG. 9, the first transfer table 3 on which the workpiece W1 is placed and the transfer gate-shaped frame 9 are integrated into the machining portion 7a. As shown in FIG. 9, the machined portion 7a performs necessary machining (milling in this embodiment) on the workpiece W1.

  In this embodiment, the conveyance portal frame 9 is fast-forwarded toward the machining portion 7a. In the machining portion 7a, the conveyance gate-shaped frame 9 is moved at a required feed speed, and as shown in FIG. 10, the front and rear mills 32, 33 of the double-head milling machine 20 move forward to move the workpiece W1. A required milling process is performed on the two front surfaces 35 and 36 facing each other.

  When milling is performed also on the two left and right surfaces 37 and 39 facing each other, as shown in FIG. 11, after the milling on the two front and rear surfaces is completed and the front and rear mills 32 and 33 are retracted, The rotary table 18 is rotated 90 degrees in the turning clamp state 45 (FIG. 11A). In the present embodiment, as described above, the axis L1 of the pressing rod 26 and the centers 42 (FIG. 5) and 43 (FIG. 16) in plan view of the first and second transfer tables 3 and 4 are aligned. Therefore, the pressing rod 26 can rotate around its axis following the rotation of the rotary table 18. After the workpiece W1 is thus rotated 90 degrees, the swing clamp state 45 (FIG. 11 (A)) returns to the main clamp state 29 (FIG. 11 (B)), and the left and right surfaces 37, 39 are opposed to each other. Again, the required milling is applied.

  After the required machining of the workpiece W1 is completed, in the main clamp state 29, as shown in FIG. 12, the conveyance gate frame 9 quickly returns to the workpiece introduction side 6a of the first conveyance table 3. It is done like this. Thus, in the state which returned to the workpiece | work introduction side 6a, in the present Example, the press state of the said raising / lowering press means 17 changes from the said clamp state 29 (FIG. 11 (B)) to the said temporary clamp state 27 (FIG. 12). ). Further, the clamped state of the first transfer table 3 with respect to the rotary table 18 is released. Thereafter, in the temporary clamped state 27, as shown by arrows in FIGS. 12 to 13, the transport table 3 and the movable overhanging member 19 are moved backward synchronously.

  In this way, the workpiece table W1 is positioned and placed on the upper surface 21 of the table by moving the transfer table 3 and the movable projecting member 19 backward in a synchronized state in a temporarily clamped state. The first transfer table 3 on which the workpiece W1 is placed can be retracted to the retracted position 10. As a result, there is an abnormality in the state after machining, such as when it is found by dimensional measurement at the retracted position 10 that the milling is not properly performed, or when it is found that the work surface is scratched. If found, it can be returned to the machining process again in the temporary clamping state as it is, and the rework can be made more efficient.

  In the state where the first transfer table 3 is in the retracted position 10, when no abnormality is found in the machining state, as shown in FIG. The state is released. Thereafter, the processed workpiece W1 on the first transfer table 3 is removed, and a new workpiece W1 is positioned and placed on the second transfer table 4. In this state, as shown in FIGS. 14 and 15, the transport gate frame 9 is moved to the right as required to exhibit a stopped state. Thereafter, as shown in FIG. 16, the pressing tool 16 descends the workpiece W <b> 1 positioned and placed on another conveyance table (second conveyance table 4) so that a temporary clamping state 27 is exhibited. . In the temporary clamped state 27, as indicated by an arrow in FIG. 16, the second transfer table 4 and the movable projecting member 19 can advance in synchronization. When the movable projecting member 19 returns to the base position 22, as shown in FIGS. 17 to 18, the transfer table 4 exhibits the advance position 11.

  In the state where the forward movement position 11 is presented, the second transfer table 4 is positioned on the work introduction side 6b (the work introduction side 6b is positioned in the right direction from the work introduction side 6a with respect to the first transfer table 3). The conveyance gate-shaped frame 9 located at a position shifted from the left and right column members 12 and 13 is introduced 30 (FIG. 1).

  Then, in the state introduced in this way, the second transport table 4 is clamped to the rotary table 18 in the same manner as described above, and the pressing tool 16 exhibits the main clamp state 29 as shown in FIG. In this main clamping state 29, movement toward the machining portion 7a, return to the workpiece introduction side 6b, and retraction of the second transfer table 4 are performed.

  More specifically, in the final clamp state 29, as indicated by an arrow in FIG. 18, the second transfer table 4 on which the workpiece W1 is placed and the transfer portal frame 9 are integrated with each other. As shown in FIG. 19, the workpiece W1 moves toward the machining portion 7a, and the machining portion 7a performs required machining (milling in this embodiment) on the workpiece W1. After the required machining of the workpiece W1 is completed, the conveyance portal frame 9 is returned to the workpiece introduction side 6b of the second conveyance table 4 as shown in FIG. Thus, in the state returned to the workpiece introduction side 6b, the clamp state of the second transfer table 4 is released in the same manner as described above, and in this embodiment, the pressing state of the lifting and lowering pressing means 17 is the book. The clamp state 29 is changed to the temporary clamp state 27. And in this temporary clamp state 27, as shown by the arrow in FIGS. 20-21, the said 2nd conveyance table 4 and the said movable overhanging member 19 move backward synchronously. When no abnormality is found in the machining state of the workpiece W1 in a state where the second transfer table 4 is in the retracted position 10, as shown in FIG. After the state is released, the processed workpiece W1 on the second transfer table 4 is removed, and a new workpiece W1 is positioned and placed on the second transfer table 4.

  In this state, as shown in FIGS. 22 and 23, the conveyance gate-shaped frame 9 is moved to the left as required and exhibits a stopped state on the workpiece introduction side 6a. In this state, as shown in FIG. 24, the pressing portion 16 of the lifting and lowering pressing means 17 lowers the workpiece W1 positioned and placed on another transfer table (first transfer table 3) temporarily. The clamped state 27 is exhibited, and in the temporary clamped state 27, the first transfer table 3 and the movable overhanging member 19 can advance synchronously as indicated by arrows in FIG.

  FIG. 25 shows the forward position 11. Thereafter, the same process as described above is repeated. As a result, while the workpiece W1 is alternately attached to and detached from the first and second transfer tables 3 and 4, the machining section 7a sequentially performs the necessary milling on the workpiece W1 to complete the machining. The workpiece W1 can be returned to the retracted position 10. And when performing the work of attaching and detaching the work alternately with respect to the first and second transfer tables 3 and 4, the operator only has to reciprocate in the left-right direction for a short distance (for example, about 1 m), Workability is good. However, since the first and second transfer tables 3 and 4 can perform the work of attaching and detaching the work W1 at the retracted position 10, the work can be attached and detached safely and efficiently in a space opened upward. it can.

  FIGS. 26 to 28 show another embodiment of the article conveying apparatus 1 according to the present invention. The movable overhanging member 19 includes the base position 22 (FIG. 26) and the overhang position 23 (FIG. 32). ) Is configured by a linear motion device 62 using a drive screw shaft 60 and a screw cylinder member 61 screwed to the drive screw shaft 60. Further, the forward / backward drive device 2 for causing the selected transport table of the first and second transport tables 3 and 4 to move back and forth comprises a fixing device 63 (FIG. 35). Configured.

  Hereinafter, the configuration of the article conveying device 1 will be described more specifically, but the configuration overlapping with that described in the first embodiment will be briefly described as appropriate. In FIG. 26, the article conveying apparatus 1 is applied as a machine tool 1a. As in the first embodiment, the first conveying table 3 and the second conveying table 4 that can reciprocate in the front-rear direction F1. Are arranged side by side in the left-right direction F2 orthogonal to the front-rear direction F1. Further, a conveyance portal frame for conveying the selected conveyance table from the workpiece introduction side 6a, 6b (a kind of article introduction side 6) toward the machining section 7a (a kind of article processing section 7). -A 9 is arranged.

  As shown in FIG. 33, each of the first and second transport tables 3 and 4 can move between the retracted position 10 and the advanced position 11 in the front-rear direction F1, and the reciprocating movement is alternated. Has been made to be done. As in the first embodiment, the workpiece introduction side 6a (FIG. 26) is for the first transport table 3, and the workpiece introduction side 6b (FIG. 51) is This is for the second transport table 4. Further, the arrangement of the first transport table 3 and the second transport table 4 adjacent to each other on the left and right sides means that both tables 3 and 4 are in the retracted position 10 as shown in FIG. It means that it arrange | positions so that it may be in the state adjacent to right and left in the state.

  In this embodiment, as shown in FIGS. 26 and 29, the conveyance gate-shaped frame 9 is provided with a left and right erected at a required interval in the left and right direction F2 (for example, with an interval of about 1650 mm). Column members 12 and 13, and a movable overhang member 19 is provided so as to connect the upper portions of the left and right column members 12 and 13. The left and right strut members 12 and 13 are provided with projecting portions 65 and 66 projecting in directions facing each other in the left and right direction F2 at the upper ends of the left and right strut portions 12a and 13a, respectively. The shape frame 9 as a whole has a gate shape in a front view. In the present embodiment, the ends 67, 69 of the left and right overhang portions 65, 66 are interrupted, and the width of the gap 70 between them is set to about 370 mm. As shown in FIGS. 26 and 29, the lower ends 64 and 68 of the left and right support members 12 and 13 are connected to each other by a connecting frame 14. The conveyance portal frame 9 having such a configuration is guided by a rail 5 extending from the workpiece introduction side 6a toward the machining portion 7a, and can reciprocate in the left-right direction. Then, the selected transport table is transported from the work introduction side 6a (FIG. 26), 6b (FIG. 51) toward the machining section 7a, and a required work W1 in the machining section 7a is obtained. After the machining is completed, the transport table is returned to the workpiece introduction side 6a or the workpiece introduction side 6b.

  As shown in FIGS. 26 and 29, a disc-shaped rotary table 18 having an indexing device that is forcibly rotated around a vertical axis is provided at the central portion of the connecting frame 14 in the left-right direction. On the rotary table 18, second rails 74 and 74 for supporting the first and second transfer tables 3 and 4 are disposed at a required interval.

  The movable projecting member 19 is provided so as to connect the upper portions of the left and right strut members 12 and 13, and in this embodiment, as shown in FIGS. 26 to 29, the left and right projecting portions 65 and 66. The front side portions 71 and 72 are provided so as to straddle the upper surface portions 73 and 75, and are movable in the front-rear direction F1. The body frame 76 constituting the movable projecting member 19 is provided with the up-and-down pressing means 17 and the fixing device 63.

  As shown in FIGS. 26 to 28, rectangular plate-like base plates 79, 80 extending in the front-rear direction F1 of the overhang portions 65, 66 are formed on the upper surface portions 73, 75 of the left and right overhang portions 65, 66, respectively. It is fixed. 28, the rear ends 79a, 80a of the base plates 79, 80 are aligned with the rear ends 65a, 66a of the overhang portions 65, 66, and the front ends 79b of the base plates 79 are of the overhang portions 65. It matches the front end 65b. Further, the front end 80 a of the base plate 80 protrudes forward from the front end 66 b of the overhang portion 66. As shown in FIG. 27, the upper surfaces 81 and 82 of the pedestal plates 79 and 80 are formed flush with each other. Then, as shown in FIGS. 26 and 28, the sliding members 83 and 83 are fixedly provided at two positions on the front and rear end sides of the upper surfaces 81 and 82, respectively, so that the left and right sliding portions are fixed. Member rows 85 and 86 (FIG. 28) are provided. As shown in FIGS. 29 and 30, the sliding members 83 constituting the left and right sliding member rows 85 and 86 are fitted to the left and right guide rails 87 and 88 extending in the front-rear direction. The left and right guide rails 87 and 88 are guided by the left and right sliding member rows 85 and 86 and can reciprocate in the front-rear direction.

  As shown in FIG. 28, the left and right guide rails 87 and 88 are fixed in parallel to the left and right portions of the lower end of the movable projecting member 19, and the left and right guide rails 87 and 88 are The movable projecting portion 19 can move in the front-rear direction F1 by moving in the front-rear direction F1 with respect to the sliding member rows 85, 86.

  As shown in FIGS. 27 to 29, the main body frame 76 constituting the movable projecting member 19 has a vertical width of 156 mm, a horizontal width of about 74 mm, and a total length as viewed in the front-rear direction of about 1840 mm. The front and rear leg members 89, 90 are connected by upper and lower connecting plates 91, 92. 27 to 28, the upper connecting plate 91 has the left and right end portions 93 and 94 in contact with the upper surfaces 95 and 96 of the left and right leg members 89 and 90, respectively. 90, and between the left and right leg members 89, 90, openings 97, 99 are provided in front and rear portions thereof. The front and rear openings 97 and 99 are configured as rectangular openings having an opening width close to the distance between the inner surfaces 100 and 101 of the left and right leg members 89 and 90 and long in the front and rear direction.

  Further, as shown in FIG. 27, the lower connecting plate 92 connects the lower portions 102, 102 of the inner surfaces 100, 101 of the left and right leg members 89, 90 to each other, Front and rear openings 103 and 105 having substantially the same shape and size are provided in a state of being vertically opposed to the front and rear openings 97 and 99 provided in the upper connecting plate 91. As shown in FIG. 30, the guide rails 87 and 88 are fixed to the lower surfaces 106 and 107 of the left and right leg members 89 and 90 so as to extend in the front-rear direction. However, each of the guide rails 87 and 88 is guided by the left and right sliding member rows 85 and 86 (FIG. 28) and can reciprocate in the front-rear direction F1.

  As shown in FIGS. 26 to 30, the linear motion device 62 that moves the movable projecting member 19 having such a configuration back and forth includes the pedestal plate 80 provided in the projecting section 66 on the side close to the machining section 7 a. It is arranged on the top. As shown in FIG. 28, the linear motion device 62 includes the drive screw shaft (for example, a ball screw) 60 and a screw cylinder member (for example, a ball screw nut) 61, and the drive screw shaft 60. However, it is extended in the front-back direction F1 in parallel with the leg member 90 shown in FIG. The portions 109 and 110 on both ends of the drive screw shaft 60 are supported by bearings 111 and 114, and one end portion (front end portion in FIG. 28) 112 of the drive screw shaft 60 viewed in the front-rear direction is supported. -It is connected to an output shaft 115 of a control motor 113 such as a motor or a stepping motor. The screw cylinder member 61 screwed to the drive screw shaft 60 is fixed to the outer surface 116 of the leg member (right leg member) 90 on the side close to the machining portion 7a. In FIG. 28, the screw cylinder member 61 is fixed to the front end portion 117 of the right leg member 90 in a state where the screw cylinder member 61 is located on the base end side (side closer to the control motor 113) of the drive screw shaft 60. Has been.

  However, when the drive screw shaft 60 is rotated forward by the control motor 113 from the base position 22 shown by a solid line in FIGS. 31A and 32, the movable projecting member 19 is moved to the position shown in FIG. 32 can be retracted toward the overhanging position 23 indicated by a one-dot chain line in FIG. Then, the screw shaft 60 is reversely rotated by the control motor 113 from the overhanging position 23, so that the movable overhanging member 19 can move forward toward the base position 22 shown in FIG. .

  As shown in FIG. 26, the first and second transport tables 3 and 4 have substantially the same configuration as in the first embodiment, and have a square plate shape in plan view. The front edge portions 3a and 4a extend in the left-right direction F2. The first and second transport tables 3 and 4 are respectively connected between the reverse position 10 and the forward position 11 as shown in FIGS. 33 (A) and 33 (B). Are moved in the front-rear direction F1 while being guided by the guides 78, 78, and the front-rear movement is performed alternately as described above. For convenience of explanation, the first and second transfer tables 3 and 4 may be illustrated as having four corners that are not rounded, that is, as a square in plan view.

  The first and second transfer tables 3 and 4 are moved from the first rails 78 and 78 to the second rails 74 and 74 as indicated by a dashed line in FIG. It is possible to transfer onto the rotating table 18. For this purpose, as shown in FIGS. 33 and 34, the first and second transport tables 3 and 4 are positioned on the left and right sides on the lower surface side, and are slid on both end portions and the central portion when viewed in the front-rear direction F1. Moving members 119, 119, 119, 119, 119, 119 are provided, and the left and right sliding members 119, 119 are guided by the left and right first rails 78, 78 extending in the front-rear direction F1. It is made like that. In the present embodiment, the left and right guide rails 78, 78 are attached to the upper surfaces of the left and right standing walls 120, 120 as shown in FIG.

  As shown in FIG. 33 (A), the front ends 121, 121 of the left and right first rails 78, 78 are separated from each other by a small gap between the left and right sides provided on the rotary table 18. The second guide rails 74 are connected to the rear ends 124 of the second guide rails 74. Accordingly, as described above, the first and second transport tables 3 and 4 are moved from the first rails 78 and 78 to the second rail 74 on the rotary table 18 side. , 74 can be transferred. As described above, the selected back-and-forth movement of the first and second transfer tables 3 and 4 is performed by the fixing device 63.

  As shown in FIGS. 27, 29, and 30, the lifting / lowering pressing means 17 is configured such that a pressing rod 26 connected to the lower end of the rod of the hydraulic cylinder 25 can be moved up and down by expansion and contraction of the hydraulic cylinder 25. The pressing rod 26 can turn around its axis L2, and the pressing portion 16 connected to the lower end of the pressing rod 26 is connected to the upper surface of the table of the first and second transport tables 3 and 4. The workpiece W1 placed on the table 21 can be pressed against the table upper surface 21 as required.

  In this pressed state, as shown in FIG. 29, the axis L2 of the pressing rod 26 and the center 42 in the plan view of the first table 3 coincide. Also in the present embodiment, as in the first embodiment, the magnitude of the pressing force is set to three types of a temporary clamping pressing force, a main clamping pressing force, and a turning clamp pressing force, which will be described later. The swivel clamp pressure and the main clamp pressure are set in this order.

  In this embodiment, the hydraulic cylinder 25 is provided on the rear side of the rear opening 99 as shown in FIG. 27. As shown in FIGS. The axis L2 of the pressing rod 26 is in a vertical state on the support plate member 126 supported via L-shaped members 125 and 125 (FIG. 30) fixed to the left and right sides 123 and 123 on the lower surface of the connecting plate 92. It is fixed as shown. As a result, the up-and-down pressing means 17 is fixed to the movable projecting member 19 and can move back and forth as the movable projecting member 19 moves back and forth.

  In this embodiment, as shown in FIGS. 26 to 27 and 35 to 37, the fixing device 63 is provided on a fixing plate 127 that is positioned in front of the rear opening 99 and arranged in a vertical state. ing. The fixing plate 127 is attached to an upper attachment piece 129 provided on the upper connection plate 91 and a lower attachment piece 130 provided on the lower connection plate 92. The upper mounting piece 129 is fixed to the upper surface 131 of the upper connecting plate 91 so as to cross the rear opening 99 in the left-right direction, and the lower mounting piece 130 is fixed to the lower surface of the lower connecting plate 92. It is fixed to 132 so as to cross the rear opening 105 in the left-right direction. As shown in FIG. 35, the fixing plate 127 has the upper and lower portions 135 and 136 of the intermediate portion in the vertical direction of the rear surface 133 in contact with the front surfaces 137 and 139 of the upper and lower mounting pieces 129 and 130, respectively. The rear surface 133 is attached to the front surfaces 137 and 139 by bolting. In the present embodiment, in order to further stabilize the mounting state of the fixing plate 127, the rear surfaces 140 and 141 of the upper and lower mounting pieces 129 and 130 are connected to each other as shown in FIGS. 142 is connected in the rear opening 99.

  As shown in FIGS. 35 to 38, a vertical lift cylinder (for example, a hydraulic cylinder) 146 is formed on a side portion 145 of the front surface 143 of the fixed plate 127 that is close to the machining portion 7a when viewed in the left-right direction. Upper and lower end portions 147 and 149 are fixed via upper and lower protruding fixing pieces 150 and 151, and the elevating cylinder 146 can be expanded and contracted in the vertical direction. Further, a support rail 153 projects from the side portion 152 on the opposite side of the front surface 143 of the fixed plate 127 so as to extend in the vertical direction. The fixing plate 127 is provided with a holding cylinder 155 that is guided by the support rail 153 and can move up and down. A lower end portion 156 of the outer peripheral surface of the holding cylinder 155 has an L-shape. A lower end 160 of the rod 159 of the elevating cylinder 146 is connected through a connecting member 157 having a shape.

  However, as the lifting / lowering cylinder 146 extends, as shown in FIGS. 35 and 37, the anchoring cylinder 155 can be lowered along the support rail 153, while the lifting / lowering cylinder 146 By reducing the size, as shown in FIGS. 36A and 38, the anchoring cylinder 155 can be raised along the support rail 153. Then, in order to move the adhering cylinder 155 up and down along the support rail 153, the adhering cylinder 155 is guided by the support rail 153 as shown in FIGS. An elevating plate 162 is fixed in which sliding members 161 and 161 that can move up and down are provided up and down.

  As shown in FIG. 35, the adhering cylinder 155 has a rotating shaft 165 extending in the vertical direction inserted through a cylindrical cylinder 163, and the rotating shaft 165 includes the adhering cylinder 165. By a turning operation by a turning operation unit 166 provided at the upper end of the body 155, for example, a forward / reverse rotation is possible in an angle range of 90 degrees. For example, as shown in FIG. 36B, the rotation operation unit 166 is disposed so as to sandwich the pinion 168 between the pinion 168 attached to the upper end portion 167 of the rotation shaft 165 and the pinion 167. And two reciprocating rack members 170 and 171 having racks 169 and 169 that mesh with each other. As a result, the pinion 167 can be rotated forward and backward, whereby the rotational shaft 165 can be rotated forward and backward within an angle range of 90 degrees.

  As shown in FIG. 35, a base portion 177 of an engaging and fixing member 176 having a hook shape, for example, is fixed to the lower end portion 175 of the rotating shaft 165. As shown in FIGS. 39 to 40, the engaging and fixing member 176 is attached to the center portion of the front edge portions 3a and 4a of the first and second transport tables 3 and 4, respectively. The engagement shaft 179a as the portion 179 can be engaged in a fitted state. In the present embodiment, the engagement shaft 179a hangs down at the top 181 of the notch 180 provided at the center in the left-right direction of the front edge 3a, 4a, as shown in FIG. 39 (A). For example, it is configured in a round shaft shape.

  Then, from the initial state 182 shown in FIGS. 39 (A) and 40 (A), in which the engagement fixing member 176 is in a protruding state toward the rod 159 side, the rotation operation unit 166 performs a correct operation. By rotating 90 degrees in the direction F3, as shown in FIGS. 39B and 40B, the engagement shaft 179a is fitted into the arc-shaped insertion recess 183 of the engagement fixing member 176. Thus, the engagement fixing member 176 and the engagement shaft 179a are connected to each other. Further, as shown in FIG. 40 (A), the rotation shaft 165 is rotated 90 degrees in the reverse direction F4 from the engaged state 185 by the rotation operation of the rotation operation unit 166. The joint fixing member 176 is detached from the engagement shaft 179a.

  Hereinafter, the configuration of the article transport apparatus 1 (machine tool 1a) having such a configuration will be described in more detail along with the operation thereof. 41, the movable overhanging member 19 exhibits the overhanging position 23 in a state where the first transfer table 3 exhibits the retracted position 10 and the workpiece W1 is positioned and placed on the table upper surface 21 as required. Shows the state. The procedure for positioning the workpiece W1 placed on the table upper surface 21 is the same as that described with reference to FIGS. As shown in FIG. 31 (B), the overhanging position 23 is formed so that the screw cylinder member 61 moves along the front end side of the drive screw shaft 60 as the drive screw shaft 60 constituting the linear motion device 62 rotates forward. It is obtained by being located at 186.

  41, when the movable projecting member 19 is located at the projecting position 23, the anchoring cylinder 155 is in a lowered state due to the extension of the elevating cylinder 146. The dwelling cylinder 155 may be lowered from the time immediately before the movable overhanging member 19 starts to retract for overhanging to the overhanging state.

  Then, at the overhanging position 23, the pressing portion 16 is lowered by the extension of the lifting / lowering pressing means 17, and the pressing portion 16 causes the workpiece W 1 on the transport table 3 to be temporarily clamped toward the table upper surface 21. A temporary clamp state 27 pressed by pressure is obtained. The temporary clamp pressing force is set to about 300 to 500 kgf as described above when the workpiece W1 is made of, for example, iron.

  In addition, as shown in FIGS. 39B and 40B, the rotation shaft 165 is rotated 90 degrees in the forward direction by the rotation operation of the rotation operation unit 166 at the overhanging position 23. Further, when the engagement shaft 179a is fitted into the arc-shaped insertion recess 183 of the engagement retention member 176, the engagement retention member 176 and the engagement shaft 179a (attached portion 179) Is engaged.

  Thereafter, when the movable projecting member 19 moves forward as indicated by an arrow in FIG. 41 in the temporary clamped state 27, the engagement fixing member 176 is connected to the engagement shaft 179a. Accordingly, the first transport table 3 can move forward in synchronism with this, and when the movable projecting member 19 returns to the base position 22 as shown in FIG. The forward position 11 is presented.

  Thus, in order to advance the workpiece W1 positioned and placed on the table upper surface 21 in the temporary clamp state 27, the state positioned by the movable positioning device 40 is the vibration when the first transfer table 3 moves forward. Therefore, the workpiece W1 can be accurately introduced into the workpiece introduction side 6a.

  With the movable projecting member 19 presenting the base position 22, the engaging and fixing member 176 is disengaged from the engaging shaft 179 a by a rotating operation in the reverse direction of the rotating operation unit 166. This detached state is the same state as shown in FIG. Thereafter, as shown in FIG. 43, the anchoring cylinder 155 is raised by the reduction of the elevating cylinder 146.

  With the movable projecting member 19 presenting the base position 22, the lifting / lowering pressing means 17 presses the work W <b> 1 on the transport table 3 with a main clamp pressing force larger than the temporary clamping pressing force. The present clamp state 29 is exhibited. The main clamp pressing force is preferably set to about 3000 to 8000 kgf, for example. In this way, the workpiece W1 can be stably fixed on the transport table 3 by setting the main clamp state 29, and machining is performed in the fixed and stable state as described in the first embodiment. be able to.

  That is, as in the first embodiment, in the main clamped state 29, as shown by the arrow in FIG. 44, the transport table 3 and the transport portal frame 9 on which the workpiece W1 is placed, Are moved toward the machining portion 7a as shown in FIG. 45, and as shown in FIG. 45, the machining portion 7a performs required machining on the workpiece W1 (in the present embodiment, the first embodiment). The same milling as in is performed.

  Then, after the required machining of the workpiece W1 is completed, in the final clamped state 29, as shown in FIG. 46, the conveyance portal frame 9 is moved to the workpiece introduction side 6a of the first conveyance table 3. It is made to return quickly. Thus, in the state which returned to the workpiece | work introduction side 6a, in the present Example, the press state of the raising / lowering press means 17 changes from the said clamp state 29 (FIG. 44) to the said temporary clamp state 27 (FIG. 46). .

  Thereafter, as shown in FIG. 47, when the lifting cylinder 146 is extended, the adhering cylinder 155 is lowered, and as shown in FIG. 40 (B), the rotation operation unit 166 is rotated forward (FIG. 40). 47 (A), the engagement shaft 179a is fitted in the fitting recess 183 of the engagement fixing member 176, and the engagement / fixation as shown by a one-dot chain line in FIG. The member 176 and the engagement shaft 179a are connected. In this state, when the drive screw shaft 60 rotates forward, the movable projecting member 19 moves in the projecting direction. Along with this movement, the first transfer table 3 moves backward in synchronism with the movement through the engagement fixing member 176, and the screw cylinder member 61 is positioned on the front end side of the drive screw shaft 60. As a result, the first transfer table 3 is in the state of exhibiting the retracted position 10. In the present embodiment, when the first transport table 3 moves back in this way, the pressing state of the lifting and lowering pressing means 17 changes from the main clamp state 29 to the temporary clamp state 27, and in the temporary clamp state 27, The first transfer table 3 is configured to retreat as indicated by an arrow in FIG.

  As described above, since the first transfer table 3 is retracted in the temporary clamp state, the milling process is not properly performed, and it is found by dimensional measurement at the retracted position 10 or the processing surface is damaged. When an abnormality is found in the state after processing, such as when it is found that the above has occurred, the first conveyance table 3 is kept in the temporary clamp state as it is and the drive screw shaft 60 is rotated with the reverse rotation. By the advancement of the movable overhanging member 19, the machining process can be returned again.

  When the first transfer table 3 is in the retracted position 10 and no abnormality is found in the machining state, as shown in FIG. 48, the pressing tool 16 is in the most elevated state, and the temporary clamp The state is released. Further, as shown in FIG. 40A, the engagement fixing member 176 is disengaged from the engagement shaft 179a by the reverse rotation F4 of the rotation shaft 165 accompanying the reverse rotation operation of the rotation operation portion 166. . Thereafter, the processed workpiece W1 on the first transfer table 3 is removed, and a new workpiece W1 is positioned and placed on the second transfer table 4.

  In this state, as shown by an arrow in FIG. 48, the conveyance gate frame 9 is moved to the right as required to exhibit a stopped state. After that, as shown in FIG. 49, the pressing portion 16 descends the workpiece W1 positioned and placed on another conveyance table (second conveyance table 4) so that a temporary clamping state 27 is exhibited. . Similarly, the engaging and fixing member 176 is rotated 90 degrees in the forward direction F3 to connect the engaging and fixing member 176 and the engaging shaft 179a. In the temporary clamped state 27, as indicated by an arrow in FIG. 49, as the movable overhanging portion 19 moves forward due to the reverse rotation of the drive screw shaft 60, the second transfer table 4 moves forward in synchronization therewith. To do. When the movable projecting member 19 returns to the base position 22, the transport table 4 exhibits the advance position 11 as shown in FIG. 50.

  In the state where the forward movement position 11 is presented, the second transfer table 4 is positioned on the work introduction side 6b (the work introduction side 6b is positioned in the right direction from the work introduction side 6a with respect to the first transfer table 3). The transfer gate-shaped frame 9 located at a position shifted from the left and right column members 12 and 13 is introduced 30 (FIG. 26).

  In the state of being introduced in this way, the lifting and lowering pressing means 17 is brought into the main clamp state 29 as shown in FIG. 50, and the engaging and fixing member 176 is the same as shown in FIG. Is rotated in the opposite direction to disengage the engaging and fixing member 176 from the engaging shaft 179a, and the fixing cylinder 155 is raised by the reduction of the elevating cylinder 146. . In the main clamp state 29, in the same manner as described above, the transport gate frame 9 is moved toward the machining portion 7a, and the transport gate frame 9 is moved to the workpiece introduction side 6b. The second transport table 4 is retracted as it returns and the movable overhanging member 19 retracts.

  After the required machining of the workpiece W1 is performed as shown in FIG. 26 and the machining is completed, as shown in FIG. 53, the conveyance portal frame 9 is moved to the second conveyance table 4 as shown in FIG. Returning to the workpiece introduction side 6b, the attachment cylinder 155 is lowered by the extension of the elevating cylinder 146, and the engagement and fixation member 176 is rotated forwardly in the same manner as shown in FIG. The fixing member 176 and the engagement shaft 179a are connected in an engaged state. In this state, as the movable overhanging member 19 moves backward as indicated by an arrow in FIGS. 53 and 54, the second transfer table 4 moves backward in synchronism with this, as shown in FIG. The transfer table 4 is in the state of being in the retracted position 10. If no abnormality is found in the lowered state of the workpiece W1, the lift pressing means 17 is lifted to release the temporary clamped state 27 in the same manner as described above, and then the machining on the second transfer table 4 is performed. The finished workpiece W1 is removed, and a new workpiece W1 is positioned and placed on the second transfer table 4.

  In this state, as shown in FIG. 40A, the engaging and fixing member 176 rotates in the reverse direction F4, and the connecting state between the engaging and fixing member 176 and the engaging shaft 179a is released. Thereafter, in the same manner as shown in FIGS. 22 to 23, the conveyance gate-shaped frame 9 is moved to the left as required to exhibit a stopped state on the workpiece introduction side 6a. Then, in this state, in the same manner as shown in FIG. 24, the pressing portion 16 descends the workpiece W1 positioned and placed on another conveyance table (first conveyance table 3) and temporarily clamped 27 In the same manner as indicated by the arrow in FIG. 24, the first transfer table 3 and the movable overhanging member 19 can advance in synchronization.

  In addition, the engagement securing member 176 and the engagement shaft 179a are connected to each other in an engaged state by the forward rotation of the engagement securing member 176. In this state, as shown in FIG. 24, as the movable overhanging member 19 moves backward, the second transfer table 4 moves forward in synchronism with this, and as shown in FIG. The transfer table 3 is in the state of the forward position 11. Thereafter, the same process as described above is repeated. Thus, while performing the work of attaching and detaching the workpiece W1 alternately with respect to the first and second transfer tables 3 and 4, the machining section 7a sequentially performs the necessary milling, and the processed workpiece is The retracted position 10 can be returned. Then, when performing the work of attaching and detaching the alternating workpieces on the first and second transfer tables 3 and 4, the operator only needs to reciprocate linearly in the left-right direction for a short distance (for example, about 1 m). Good workability. However, since the first and second transfer tables 3 and 4 can perform the work of attaching and detaching the work W1 at the retracted position 10, the work can be attached and detached safely and efficiently in a space opened upward. it can.

  The present invention is by no means limited to those shown in the above-described embodiments, and it goes without saying that various design changes can be made within the scope of the claims. One example is as follows.

(1) FIG. 56 shows another embodiment of the article conveying device 1 and the machine tool 1a according to the present invention, in which the conveying gate-shaped frame 9 is composed of a single column member 2. -Changed to 9a. In the present embodiment, the movable overhanging member 19 including the raising / lowering pressing means 17 capable of moving the pressing portion 16 up and down can be moved in the front-rear direction F1 to the upper portion 190 of the column member 2 by various known means. ing. In a more specific mode, two guide rails 191 and 191 extending in the front-rear direction are provided at the upper and lower portions of the end surface 19a of the movable projecting member 19, and are fitted to the upper and lower guide rails 191 and 191. Matching sliding members 192 and 192 are provided on the end surface 190 a of the upper portion 190. As a result, the upper and lower guide rails 191 and 191 are guided by the upper and lower sliding members 192 and 192 and can reciprocate in the front-rear direction F1, and thus the movable overhanging member 19 can move in the front-rear direction F1. For example, as shown in FIG. 56, the movement in the front-rear direction F1 is performed using a linear motion device 62 having a drive screw shaft 60 and a screw cylinder member 61 having the same configuration as shown in the second embodiment. be able to.

  One of the first and second transfer tables 3 and 4 at the forward movement position 11 is positioned on the article introduction side 6 (work introduction side 6a and the like) as shown in FIG. The transport frame 9a is introduced into the side portion 38 of the column member 2 of the transport frame 9a, and in the introduced state, the transport frame 9a together with the transport table and the article processing section 7 ( It is possible to move toward the machined part 7a and the like. Further, in the same manner as described above, the movable overhanging member 19 pushes the article W (work W1 or the like) on the transport table at the forward movement position 11 toward the table upper surface 21 of the transport table by the lift pressing means 17. It is possible to move in the front-rear direction between the base position 22 that can be moved and the overhanging position 23 where the lifting and lowering pressing means 17 can press the article W (W1) on the transport table in the retracted position 10 toward the upper surface 21 of the table. It has been.

(2) Machining by the machine tool is not limited to the above-described milling, but refers to general machining.

(3) In the present invention, the main clamp pressing force includes a pressing force equivalent to the temporary clamp pressing force. For example, when machining a workpiece made of aluminum or resin, the main clamp pressing force may be set equal to the temporary clamping pressing force because light cutting is performed.

(4) In the state where the forward movement position 11 is presented, the lifting / lowering pressing means 17 presses the article on the transport table with the temporary clamp pressing force, and the article W is placed thereon. 1. When the second transfer table 3 (4) and the transfer frame 9a or the transfer portal frame 9 move together toward the article processing unit 7, for example, immediately before the machining, etc. Immediately before the article processing, the temporary clamp pressing force may be switched to a larger clamping pressing force.

(5) In FIGS. 1 and 57, reference numeral 47 denotes auxiliary pressing means disposed on the left and right of the pressing rod 26 of the lifting / lowering pressing means 17. The auxiliary pressing means 47, 47 are configured so that the auxiliary pressing portions 49, 49 can move up and down by, for example, expansion and contraction of the hydraulic cylinder 48, and are fixed to the lower surface portion 50 (FIG. 57) of the horizontal frame 15. Is provided. Even if the movable overhanging member 19 moves back and forth, the auxiliary pressing means does not move back and forth with it, and is always in a fixed position.

  When the workpiece W1 is relatively long in the left-right direction, for example, as shown in FIG. 56, the auxiliary pressing means 47, 47 stabilizes the fixed state of the workpiece W1 with respect to the table upper surface 21, thereby shifting the position of the workpiece W1. In order to prevent this, the machining is performed with high accuracy. The auxiliary pressing portions 49 and 49 are configured to exhibit a raised position when the rotary table 18 is rotated. The auxiliary pressing portions 49 and 49 having such a configuration can be applied to the article conveying apparatus 1 and the machine tool 1a according to the second embodiment.

(6) The means for positioning the workpiece W1 on the table upper surface 21 may be a mark or the like provided on the table upper surface 21 in addition to the movable positioning device 30.

(7) The means for enabling the movable projecting member to move back and forth between the base position 22 and the projecting position 23 includes, in addition to the mechanism including the rack and pinion described above and the linear motion device 62, for example, It is also possible to configure using a telescopic action such as a hydraulic cylinder or an air cylinder. In addition, various known means that enable such back-and-forth movement can be employed.

(8) In the case where the transport portal frame 9 is configured by connecting the upper portions of the left and right support members 12, 13 with the horizontal frame 15, the vertical movement of the pressing portion 16 by the lifting and pressing means is performed. When the stroke is small, the movable projecting member 19 can be provided on the lower surface side of the horizontal frame 15.

(9) When performing the milling, in the embodiment, the transport gate frame 9 is configured to move at a required feed speed, but the double-head milling machine 20 is configured to move in the left-right direction. You can also.

(10) In the transport portal frame 9 according to the embodiment, the lower ends of the left and right support members 12 and 13 are connected to each other by the connecting frame 14, but the connecting frame 14 may be omitted. In this case, after the transfer table in the state of the advance position 11 is introduced between the left and right support members 12, 13, the transfer table and the transfer gate frame 9 are synchronized with each other on the left and right. It is configured to move in the direction.

(11) After the article such as the workpiece W1 returns to the article introduction side 6, the transfer tables 3 and 4 may be retracted to the retracted position 10 in a state where the lifting and pressing means 17 is not pressed.

(12) It is not essential to fast-forward or fast-return the transport portal frame 9 as described above.

(13) When the rotary table 18 is rotated at a required indexing angle such as 90 degrees, the place where the rotation is performed is the size of the article placed on the transport table, the table upper surface 21 In consideration of the degree of protrusion of the article from the edge, etc., it is set not to collide with the rail 8 or the like.

(14) After the required machining in the machining section 7a is completed, the transfer table normally returns to the workpiece introduction side in the final clamped state 29. If there is no fear that the workpiece will be displaced, the main clamping state 29 may be returned to the temporary clamping state 27 after the machining is completed. Also, it may not be clamped.

(15) The machine tool 1a according to the present invention is configured as a subordinate concept of the article conveying apparatus 1 according to the present invention. The article conveying apparatus 1 includes two conveying tables arranged side by side on the left and right sides. 3 and 4 and a conveyance portal frame 9 that conveys the article W placed on the selected conveyance table from the article introduction side 6 toward the article processing unit 7. is there.

  The article processing unit 7 includes an article processing unit for attaching a specific part to the article W conveyed in a required positioning state by welding, screw fixing, or the like, or a recess provided with the specific part in the article W. In addition to an article processing unit such as fitting into an article processing unit for performing processing such as delivery of an article W conveyed in a required positioning state to a robot or the like or introduction to a specific place, a specific physical or Various article processing units such as an article processing unit for performing chemical treatment can be exemplified. Then, the article conveyed to the article processing unit 7 is conveyed in the main clamp state by the required pressing force set in accordance with the processing operation in the article processing unit 7.

  In the article transport apparatus, after the article processing unit 7 performs a required process, the article (workpiece or the like) may be returned to the article introduction side 6 or may not be returned. The machine tool 1a including the machining unit 7a is an example in which a processed article (work) is returned to the article introduction side (work introduction side).

  In order to efficiently perform the article processing in the article processing unit 7, the article transport apparatus 1 includes two transport tables 3 and 4 that are arranged adjacent to each other on the left and right. Thus, the movement of the worker who performs the work of attaching and detaching the article is made linear in the left-right direction, and the productivity can be improved so that the movement is not wasted.

  In the article conveying apparatus 1, the article W is properly positioned and placed on the table upper surface 21 of the selected conveying table, and the movable projecting member 19 presents the projecting position 23 in the placed state. It is done like this. At the overhanging position 23, the pressing tool 16 is lowered so that the article 5 on the transfer tables 3 and 4 is in a temporary clamped state pressed against the table upper surface 21 with a temporary clamp pressing force. Thereafter, the same operation as that described with respect to the machine tool 1a is performed.

  Also in the article conveying apparatus 1 according to the present invention, the auxiliary pressing means 46 and 46 can be provided in the same manner as described above.

(16) The engagement connecting portions 202, 203 provided on the left and right drive side surface portions 200, 201 of the longitudinal drive device 2, and the side surface portions 205 of the first and second transport tables 3, 4. , 206, the engaging connection portions 202, 203 are configured as shaft portions as shown in the above embodiment, and the shaft portions In addition to the structure in which the engagement connecting portions 202 and 203 are inserted into and engaged with the engagement connected portions 207 and 209 as concave portions provided in the side surface portions 205 and 206, the drive side surface portion 200, The engagement connecting portions 202 and 203 provided in 201 are configured so as to be rotatable, and the engagement connecting portions 202 and 203 are hooked on the engaged connected portions 207 and 209 by the rotation. Including things that are in state is there.

  In addition, when the engagement connecting portions 202 and 203 protrude, the engagement connected portions 207 and 209 are engaged with the engagement connected portions 202 and 203 and the engagement connected portions 207 and 209. If it is a thing of the structure connected to an engagement state, for example, it can comprise using various well-known means, such as a thing by which a shaft-shaped part will be in an insertion state in a hole.

(17) As shown in the second embodiment, the engaging and securing member 176 is connected to the secured portion 179 as the front edge portions 3a and 4a of the left and right transport tables 3 and 4 in the engaged state. The means is configured to be connected so that the engagement shaft 179a is fitted to the fitting recess 183 of the engagement securing member 176 as described above, and for example, the secured portion as a hole portion. The shaft-like engagement and fixing member 176 can be inserted into the state, or can be configured by using various known means such as a reverse configuration. Further, the adherend part 179 provided on the left and right transport tables 3 and 4 is not limited to the front edge part 3a or 4a, but the side edge parts 3b and 4b, the bottom surface part, etc. Any part can be set as long as it is a part that can be connected to the attachment member 176 in an engaged state.

(18) In the second embodiment, the engagement fixing member 176 is provided to be movable up and down. However, when the transport table on which the article W is placed moves toward the article processing unit 7, The engagement fixing member 176 can be provided so as not to move up and down as long as it does not hinder the article processing (machining or the like) in the article processing unit 7. Alternatively, the stroke may be set small even if it is moved up and down.

(19) FIG. 58 shows a case where the standby position of the movable positioning device 40 is positioned between the first and second transport tables 3 and 4 located on the left and right. The position 40 is placed on the table upper surfaces 21 and 21 of the first and second transport tables 3 and 4 by moving from the standby position to the left or right as indicated by arrows. The work W1 can be positioned as required. In the case of such a configuration, since the moving range of the movable positioning device 40 performed for positioning the work W1 can be made as small as possible, the efficiency of positioning work may be achieved. This configuration is preferably adopted when, for example, the work placed on the table upper surface 21 is relatively small.

(20) After the processed workpiece W1 on the first transfer table 3 is removed while the first transfer table 3 is in the retracted position 10, in FIG. The frame 9 is moved in the right direction so that the lifting / lowering pressing means 17 descends and presses the workpiece W1 placed on the second transfer table 4 in the temporary clamping state 27. In contrast, after the processed workpiece W1 on the first transfer table 3 is removed, the movable overhanging member 19 moves forward without the transfer portal frame 9 moving in the right direction. Return to the base position 22 and then the transfer portal frame 9 moves to the right as required to form a workpiece introduction side 6b for the second transfer table. In order to press the workpiece on the first transfer table 4 in the temporary clamped state 27, the movable projecting member 19 can be configured to retract. Such a configuration can be applied to the article conveying apparatus 1 in addition to being applied to the machine tool 1a.

DESCRIPTION OF SYMBOLS 1 Article conveyance apparatus 1a Machine tool 2 Back-and-forth movement drive device 3 1st conveyance table 4 2nd conveyance table W Article W1 Work 6 Article introduction side 6a Work introduction side 7 Article processing part 7a Machining part 9 Conveyance portal frame 10 Backward position 11 Forward position 12 Supporting member 13 Supporting member 14 Connecting frame 16 Pressing portion 17 Lifting pressing means 19 Movable projecting member 20 Double head milling machine 21 Table top surface 22 Base position 23 Overhanging position 26 Pressing rod 27 Temporary clamping state 29 Main clamping state 30 Posting Between members 41 U-shaped notch 45 Swivel clamp state 46 Auxiliary pressing means 60 Drive screw shaft 61 Screw cylinder member 62 Linear motion device 63 Adhering device 146 Lifting cylinder 155 Adhering cylinder 165 Rotating shaft 166 Rotating operation unit 176 engagement securing member 179 secured part 2 00 Drive side surface portion 201 Drive side surface portion 202 Engagement connection portion 203 Engagement connection portion 207 Engagement portion 209 Engagement portion

Claims (16)

Two transport tables that can reciprocate in the front-rear direction are arranged side by side as viewed in the left-right direction perpendicular to the front-rear direction, and the article placed on the selected transport table is introduced. A transport frame for transporting from the side toward the article processing unit is disposed;
Each of the two transport tables can move in the front-rear direction between a retracted position and an advanced position, and the front-rear movement of the two transport tables is performed alternately.
The transport frame is provided with a movable overhang member provided on the upper portion of the support member, which includes a lifting and lowering pressing means that allows the pressing portion to move up and down.
Any one of the transport tables in the forward position is introduced into a side portion of the support column member of the transport frame located on the article introduction side, and in the introduced state. , The transport frame is movable together with the transport table toward the article processing unit,
The movable projecting member includes a base position at which the lifting / lowering pressing means can press an article on the transport table in the forward position toward the table upper surface of the transport table, and an article on the transport table in the retracted position. An article conveying apparatus characterized by being movable in the front-rear direction between an overhanging position where the lifting and lowering pressing means can press toward the upper surface of the table. Two transport tables that can reciprocate in the front-rear direction are arranged side by side as viewed in the left-right direction perpendicular to the front-rear direction, and the article placed on the selected transport table is introduced. A conveyance gate-shaped frame that conveys from the side toward the article processing unit is disposed,
Each of the two transport tables can move in the front-rear direction between a retracted position and an advanced position, and the front-rear movement of the two transport tables is performed alternately.
The transport gate-shaped frame includes left and right support members erected at a necessary interval in the left-right direction,
In order to connect the upper parts of the left and right strut members, a movable overhanging member is provided that includes an elevating and pressing means that allows the pressing portion to move up and down.
Any one of the transfer tables in the forward position is introduced between the left and right support members of the transfer portal frame positioned on the article introduction side. In the state, the conveyance portal frame is movable toward the article processing unit together with the conveyance table,
The movable projecting member includes a base position at which the lifting / lowering pressing means can press an article on the transport table in the forward position toward the table upper surface of the transport table, and an article on the transport table in the retracted position. An article conveying apparatus characterized by being movable in the front-rear direction between an overhanging position where the lifting and lowering pressing means can press toward the upper surface of the table. The article conveying apparatus according to claim 2, wherein
In a state where the transport table is in the retracted position and the article is positioned and placed on the upper surface of the table, the movable projecting member is configured to exhibit the projecting position, and the pressing portion is lowered at the projecting position. Then, the pressing portion is configured to exhibit a temporary clamp state in which the article on the transport table is pressed with a temporary clamp pressing force toward the upper surface of the table,
In the temporary clamped state, the transport table and the movable overhanging member can be moved forward in synchronization, and when the movable overhanging member returns to the base position, the transport table exhibits the advance position. And
In the state where the forward movement position is exhibited, the lifting / lowering pressing means presses the article on the transport table with the main clamp pressing force which is equal to or larger than the temporary clamping pressing force. As it is presented,
In the main clamp state, the transport table on which the article is placed and the transport portal frame are integrally moved toward the article processing unit,
After the required processing of the article in the article processing unit is completed, the conveyance portal frame is returned to the article introduction side together with the conveyance table, and then the conveyance table is returned to the retracted position,
Further, an article is positioned and placed on the upper surface of a transport table different from the transport table and is temporarily clamped by the lifting and pressing means, and the separate transport table moves forward and moves forward. In the state where the forward movement position is exhibited, the another conveyance table is introduced between the left and right support members of the conveyance portal frame located on the introduction side, and thereafter The elevating and pressing means is configured to exhibit the main clamp state, and in the main clamp state, the movement toward the article processing unit and the required processing of the article in the article processing unit are performed. In addition, after the required processing of the article in the article processing unit is completed, the conveyance portal frame is returned to the article introduction side together with the conveyance table, and thereafter Article carrying apparatus, characterized in that the conveying table has been made as returns to the retracted position. The article conveying apparatus according to claim 2, wherein
In a state where the transport table is in the retracted position and the article is positioned and placed on the upper surface of the table, the movable projecting member is configured to exhibit the projecting position, and the pressing portion is lowered at the projecting position. Then, the pressing portion is configured to exhibit a temporary clamp state in which the article on the transport table is pressed with a temporary clamp pressing force toward the upper surface of the table,
In the temporary clamped state, the transport table and the movable overhanging member can be moved forward in synchronization, and when the movable overhanging member returns to the base position, the transport table exhibits the advance position. And
In the state where the forward movement position is exhibited, the lifting / lowering pressing means presses the article on the transport table with the main clamp pressing force which is equal to or larger than the temporary clamping pressing force. As it is presented,
In the main clamp state, the transport table on which the article is placed and the transport portal frame are integrally moved toward the article processing unit,
After the required processing of the article in the article processing unit is completed, the conveyance portal frame is configured to return to the article introduction side together with the conveyance table. In the temporary clamp state, the transport table and the movable overhanging member are moved backward in synchronization, and the transport table is in the retracted position in the state where the transport table is in the retracted position. And the temporary clamped state is released, and in the released state and the movable overhanging member exhibits the overhanging position, the transport gate frame moves in the left-right direction as required and stops. made as exhibiting, in a stopped state thus, the article is placed is positioned on a separate conveyor table to the conveying table in descending the pressing unit In the temporary clamped state, the transport table and the movable overhanging member can move in a forward direction synchronously, and when the movable overhanging member returns to the base position, the transport table is The forward movement position is set so that the transfer table is introduced between the left and right column members of the transfer gate-shaped frame located on the article introduction side in the state where the advance position is shown. At the same time, the elevating and pressing means is configured to exhibit the main clamp state, and in the main clamp state, the movement toward the article processing unit and the required processing of the article in the article processing unit are performed. In addition, the conveyance portal frame returns to the article introduction side together with the conveyance table, and then the conveyance table returns to the retracted position. Article carrying apparatus, characterized in that there.   The two transport tables are arranged side by side on the left and right sides of the front and rear drive device, and the left and right engagement connecting portions can protrude from the left and right drive side surfaces of the front and rear drive device, respectively. The left and right engagement connection portions can be engaged with engagement connected portions provided on the side surfaces of the left and right transport tables facing the drive side surface portions. The engagement connecting portion can be moved forward or backward in synchronization with the movable projecting member in a state where the engaging connecting portion and the engaged connected portion are connected in an engaged state. The article conveying apparatus according to 2, 3 or 4. Engagement that is connected to the movable overhanging member in a state of engagement with the adherends provided on the left and right transport tables and is released when the engagement state is released. An adhesion member is provided,
In the state in which the movable projecting member is in the base position and the projecting position, the engagement securing member is in the forward position or the retracted position. And can be connected in an engaged state, and the engaged state is released and the connection is released.
The transport table is moved in synchronization with the movable projecting member by the movement of the movable projecting member in the front-rear direction in a state where the engagement securing member is connected to the secured part. 5. The article conveying apparatus according to claim 1, 2, 3 or 4. Engagement that is connected to the movable overhanging member in a state of engagement with the adherends provided on the left and right transport tables and is released when the engagement state is released. The attachment member is provided to be movable up and down,
With the movable projecting member in the base position and in the projecting position, the engagement securing member can exhibit a lowered state, and in the lowered state, the engagement securing member is It is possible to connect to the secured portion of the transport table at the forward position or the reverse position in an engaged state, and the engagement state is released and the engagement is released. The fixing member is supposed to be in an elevated state,
The transport table is moved in synchronization with the movable projecting member by the movement of the movable projecting member in the front-rear direction in a state where the engagement securing member is connected to the secured part. 5. The article conveying apparatus according to claim 1, 2, 3 or 4.   The engagement fixing member is attached to a rod of an elevating cylinder that is provided on the movable overhanging member and can be expanded and contracted in the vertical direction, and can move up and down according to the expansion and contraction of the elevating cylinder. A rotating shaft extending in the up-down direction is inserted into the attachment cylinder body, and the rotation shaft is capable of at least forward and reverse rotation. An engaging and fixing member provided with a fitting recess for fitting an engaging shaft as the secured portion, which hangs down at the respective front edge portions of the left and right transport tables, at the lower end portion of the moving shaft. The anchoring cylinder is lowered by extension of the elevating cylinder, and the rotating shaft rotates in the forward direction in the lowered state, so that the engaging shaft is fitted into the fitting recess. The engagement fixing member and the engagement shaft are connected to each other in an engaged state. On the other hand, when the rotating shaft rotates in the reverse direction in the lowered state, the engaging shaft is disengaged from the fitting recess, and the engagement fixing member and the engaging shaft are engaged with each other. 8. The article transporting apparatus according to claim 7, wherein the lifting cylinder can be reduced and the attachment cylinder can be raised while the engagement cylinder is released, whereby the engagement and fixation member is raised. Two transfer tables that can reciprocate in the front-rear direction are arranged side by side as viewed in the left-right direction orthogonal to the front-rear direction, and a work placed on the selected transfer table is introduced. A transport frame for transporting from the side toward the machining section is provided,
Each of the two transport tables can move in the front-rear direction between a retracted position and an advanced position, and the front-rear movement of the two transport tables is performed alternately.
The transport frame is provided with a movable overhang member provided on the upper portion of the support member, which includes a lifting and lowering pressing means that allows the pressing portion to move up and down.
Any one of the transfer tables in the state of the advance position is introduced into a side portion of the support column member of the transfer frame located on the work introduction side. In this state, the transport frame is movable toward the machining unit together with the transport table,
The movable projecting member includes a base position where the lifting and pressing means can press the work on the transport table in the forward position toward the table upper surface of the transport table, and the work on the transport table in the retracted position. A machine tool, wherein the machine tool is movable in the front-rear direction between an overhanging position at which the lifting / lowering pressing means can press toward the upper surface of the table. Two transfer tables that can reciprocate in the front-rear direction are arranged side by side as viewed in the left-right direction orthogonal to the front-rear direction, and a work placed on the selected transfer table is introduced. A conveyance gate-shaped frame that conveys from the side toward the machining section,
Each of the two transport tables can move in the front-rear direction between a retracted position and an advanced position, and the front-rear movement of the two transport tables is performed alternately.
The transport gate-shaped frame includes left and right support members erected at a necessary interval in the left-right direction,
In order to connect the upper parts of the left and right strut members, a movable overhanging member is provided that includes an elevating and pressing means that allows the pressing portion to move up and down.
Any one of the transfer tables in the state of the advance position is configured to be introduced between the left and right support members of the transfer portal frame located on the workpiece introduction side, In the introduced state, the conveyance portal frame is movable toward the machining section together with the conveyance table,
The movable projecting member includes a base position where the lifting and pressing means can press the work on the transport table in the forward position toward the table upper surface of the transport table, and the work on the transport table in the retracted position. A machine tool, wherein the machine tool is movable in the front-rear direction between an overhanging position at which the lifting / lowering pressing means can press toward the upper surface of the table. The machine tool according to claim 10,
The movable projecting member exhibits the projecting position in a state where the transport table exhibits the retracted position and a workpiece is positioned and placed on the upper surface of the table, and the pressing portion descends at the projecting position. Then, the pressing portion is made to exhibit a temporary clamping state in which the workpiece on the transport table is pressed with a temporary clamping pressing force toward the upper surface of the table,
In the temporary clamped state, the transport table and the movable overhanging member can be moved forward in synchronization, and when the movable overhanging member returns to the base position, the transport table exhibits the advance position. And
In the state where the forward movement position is exhibited, the lifting / lowering pressing means presses the work on the transfer table with the main clamping pressure which is equal to or larger than the temporary clamping pressure. As it is presented,
In the main clamp state, the transfer table on which the work is placed and the transfer gate frame are integrally moved toward the machining unit,
After the required machining of the workpiece in the machining section is completed, the conveyance portal frame is configured to return to the workpiece introduction side together with the conveyance table,
Further, after returning to the workpiece introduction side, the transfer table in a state where the workpiece is placed is configured to exhibit the retracted position,
A work is positioned and placed on the upper surface of a transport table different from the transport table and is placed in the temporary clamp state by the lifting and pressing means, and the separate transport table moves forward and exhibits the advance position. In the state where the forward position is exhibited, the other transport table is introduced between the left and right support members of the transport portal frame located on the workpiece introduction side, and thereafter The elevating and pressing means is configured to exhibit the main clamping state, and in the main clamping state, the movement toward the machining unit and the required machining of the workpiece in the machining unit are performed. In addition, after the machining is completed, the conveyance portal frame is returned to the work introduction side together with the conveyance table, and then the conveyance table. Machine tool, characterized by being made as returns to the retracted position. The machine tool according to claim 10,
The movable projecting member exhibits the projecting position in a state where the transport table exhibits the retracted position and a workpiece is positioned and placed on the upper surface of the table, and the pressing portion descends at the projecting position. Then, the pressing portion is made to exhibit a temporary clamping state in which the workpiece on the transport table is pressed with a temporary clamping pressing force toward the upper surface of the table,
In the temporary clamped state, the transport table and the movable overhanging member can be moved forward in synchronization, and when the movable overhanging member returns to the base position, the transport table exhibits the advance position. And
In the state where the forward movement position is exhibited, the lifting / lowering pressing means presses the article on the transport table with the main clamp pressing force which is equal to or larger than the temporary clamping pressing force. As it is presented,
In the main clamp state, the transfer table on which the article is placed and the transfer gate frame are integrally moved toward the machining unit,
After the required machining of the workpiece in the machining section is completed, the conveyance portal frame returns to the workpiece introduction side together with the conveyance table in the main clamp state or the temporary clamp state. In the returned state, the elevating and pressing means is configured to exhibit the temporary clamp state, and in the temporary clamp state, the transfer table and the movable overhanging member move backward in synchronization, and the transfer table moves backward. In the state where the position is present, the lifting and lowering pressing means is lifted to release the temporary clamp state, and in the released state and the movable projecting member presents the projecting position, the transport portal frame is It moves as required in the left-right direction to exhibit a stopped state, and in this stopped state, it is positioned on a transport table different from the transport table. The workpiece placed thereon is lowered so that the pressing portion is lowered to exhibit a temporary clamp state, and in the temporary clamp state, the transport table and the movable overhanging member can move in a forward direction synchronously, When the movable overhanging member returns to the base position, the transfer table exhibits the advance position, and the transfer table is positioned on the workpiece introduction side in the state of the advance position. In addition to being introduced between the right and left support members of the shape frame, the elevating and pressing means is configured to exhibit the main clamp state, and in the main clamp state, the movement toward the machining portion is performed. The required machining of the workpiece in the machining section is performed, and after the machining is completed, the conveyance portal frame is moved to the conveyance table. Made as both return to the workpiece inlet side, a machine tool is subsequently conveying table characterized in that it is made as returns to the retracted position.   The two transport tables are arranged side by side on the left and right sides of the front and rear drive device, and the left and right engagement connecting portions can protrude from the left and right drive side surfaces of the front and rear drive device, respectively. The left and right engagement connection portions can be engaged with engagement connected portions provided on the side surfaces of the left and right transport tables facing the drive side surface portions. The engagement connecting portion can be moved forward or backward in synchronization with the movable projecting member in a state where the engagement connecting portion and the engaged connected portion are connected in an engaged state. 10, 11 or 12 machine tools. Engagement that is connected to the movable overhanging member in a state of engagement with the adherends provided on the left and right transport tables and is released when the engagement state is released. An adhesion member is provided,
In the state in which the movable projecting member is in the base position and the projecting position, the engagement securing member is in the forward position or the retracted position. And can be connected in an engaged state, and the engaged state is released and the connection is released.
The transport table is moved in synchronization with the movable projecting member by the movement of the movable projecting member in the front-rear direction in a state where the engagement securing member is connected to the secured part. The machine tool according to claim 9, 10, 11 or 12, wherein Engagement that is connected to the movable overhanging member in a state of engagement with the adherends provided on the left and right transport tables and is released when the engagement state is released. The attachment member is provided to be movable up and down,
With the movable projecting member in the base position and in the projecting position, the engagement securing member can exhibit a lowered state, and in the lowered state, the engagement securing member is It is possible to connect to the secured portion of the transport table at the forward position or the reverse position in an engaged state, and the engagement state is released and the engagement is released. The fixing member is supposed to be in an elevated state,
The transport table is moved in synchronization with the movable projecting member by the movement of the movable projecting member in the front-rear direction in a state where the engagement securing member is connected to the secured part. The machine tool according to claim 9, 10, 11 or 12, wherein   The engagement fixing member is attached to a rod of an elevating cylinder that is provided on the movable overhanging member and can be expanded and contracted in the vertical direction, and can move up and down according to the expansion and contraction of the elevating cylinder. A rotating shaft extending in the vertical direction is inserted into the attachment cylinder body, and the rotating shaft can be rotated forward and backward. At the lower end portion of the shaft, there is provided an engagement fixing member provided with a fitting recess for fitting an engagement shaft as the secured portion, which hangs down at the respective front edge portions of the left and right transport tables. The anchoring cylinder is lowered by extension of the elevating cylinder, and the rotating shaft rotates in the forward direction in the lowered state, so that the engaging shaft is fitted in the insertion recess. Accordingly, the engagement fixing member and the engagement shaft are connected in an engaged state. When the rotating shaft rotates in the reverse direction in the lowered state, the engaging shaft is disengaged from the fitting recess, and the engagement fixing member and the engaging shaft are disengaged. The machine tool according to claim 15, wherein the elevating cylinder is contracted in a state where the lifting cylinder can be raised, whereby the engagement and fixing member is raised.

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