WO2017208515A1

WO2017208515A1 - Formwork group transfer device and transfer method

Info

Publication number: WO2017208515A1
Application number: PCT/JP2017/005664
Authority: WO
Inventors: 公一金藤; 大野　泰嗣
Original assignee: 新東工業株式会社
Priority date: 2016-05-31
Filing date: 2017-02-16
Publication date: 2017-12-07
Also published as: CN108136490A; JP6551307B2; JP2017213575A

Abstract

Provided are a formwork group transfer method and transfer device with which it is possible to maintain a uniform gap between formworks without being affected by thermal expansion of the formwork. This formwork group transfer device involves sandwiching a formwork group arranged in a straight line between a pusher cylinder (10) and a cushion cylinder (11), and intermittently transferring the formwork group by the pitch of a single formwork or a plurality of formworks. The formwork group transfer device is provided with a cushion cylinder equipped with a suspend movement function and an expanded/contracted position recognition function and that allows the stopping position on the extending end side to be varied arbitrarily. On the upstream side of the cushion cylinder, the formwork group transfer device is provided with a positioning device (17) for feeding formwork having a function which, by feeding inadequately fed formworks to a predetermined position, feeds inadequately fed formworks on the formwork transfer device to a predetermined position on the formwork transfer device (7); and a frame return device (24) having a function of returning one frame of formwork fed to a predetermined position by this frame feed positioning device, to an inadequately fed position transferred to by means of the pusher cylinder.

Description

Formwork group conveying apparatus and conveying method

The present invention relates to a conveying apparatus and a conveying method for a mold group in which mold groups arranged in series are sandwiched between a pusher cylinder and a cushion cylinder and intermittently conveyed by a pitch corresponding to one mold frame or a plurality of mold frames. . More specifically, the present invention relates to a transport apparatus and a transport method for a mold group that can keep a gap between the molds constant even when the mold is thermally expanded.

In a casting facility using a mold, as shown in Patent Document 1 and Patent Document 2, a group of molds arranged in series is sandwiched between a pusher cylinder and a cushion cylinder, and one mold frame or a plurality of mold frames Intermittent conveyance is performed by pitches of minutes.

Patent Document 1 describes a method of conveying a group of molds arranged in series between a hydraulic pusher cylinder and a hydraulic cushion cylinder using a hydraulic cylinder in a group of molds that are intermittently conveyed by a pitch of one mold frame. Yes. In this transfer method, when transfer is performed with a gap between the hydraulic pusher cylinder, the mold, and the hydraulic cushion cylinder, the hydraulic pusher cylinder is operated at a low speed while the cushion cylinder having the gap does not move. When the cushion cylinder is pushed by the mold and starts to move backward, the hydraulic pusher cylinder is operated at a high speed, and a switch for detecting the position to decelerate during the high-speed transfer is attached to the pusher.

Patent Document 2 also describes a method of transporting a formwork group using a hydraulic cylinder in which formwork groups arranged in series are sandwiched between a hydraulic pusher cylinder and a hydraulic cushion cylinder, and intermittently transported by a pitch of one formwork. . In this transfer method, when transfer is performed with a gap between the hydraulic pusher cylinder, the mold, and the hydraulic cushion cylinder, the hydraulic pusher cylinder is operated at a low speed while the cushion cylinder having the gap does not move. The point that the hydraulic pusher cylinder is operated at a high speed after the cushion cylinder is pushed by the formwork and retreats is the same as in Patent Document 1, but the switch for detecting the position to decelerate during the high-speed conveyance is set on the cushion side. By mounting, it is characterized by keeping the deceleration distance constant without being affected by the thermal expansion of the formwork.

However, both Patent Documents 1 and 2 have a problem of being affected by the fluctuation of the gap between the molds due to the thermal expansion of the molds because the fixed stroke cylinders are used as the hydraulic pusher cylinder and the hydraulic cushion cylinder. That is, during the operation of the equipment, the molds become hot and thermally expand, so the gap between the molds is minimized, and the low-speed time for gap clearance can be minimized. Due to the low temperature of the frame, the gap between the molds is maximized, and the slowing time for gap clearance is also maximized. In some cases, it is difficult to operate the equipment in a predetermined process time. If there is enough capacity in the equipment, the formwork with the largest gap between the formwork is adjusted so that it can be operated in a predetermined process time immediately after the operation of the low-temperature equipment is started. Since the process time when the mold with the smallest gap becomes high temperature becomes faster than the predetermined process time, there is a problem that the wear of the equipment due to high-speed operation is accelerated.

Accordingly, the object of the present invention is to secure the clearance time immediately after the start of operation of the equipment having a maximum clearance at a low temperature, without reducing the operation time of each actuator (cylinder) more than necessary. In order to be able to adjust the operating time of each actuator comfortably according to the gap when the mold with the smallest gap, which is the original operating state, becomes hot, the mold is not affected by the thermal expansion of the mold. It is an object of the present invention to provide a transport device and a transport method for a form group capable of keeping a gap between frames constant.

JP 2004-042073 A JP2013-052422A

In order to solve the above-described problems, the present invention provides a form group group conveying apparatus in which form group groups arranged in series are sandwiched between a pusher cylinder and a cushion cylinder, and a pitch corresponding to one form frame or a plurality of form frames. In the conveyance device of the form group which performs intermittent conveyance one by one, the stop position on the extended end side can be arbitrarily changed as the cushion cylinder, and an electric cylinder or hydraulic cylinder with an expansion / contraction position recognition function and a halfway stop function is provided. At the same time, a function of feeding the insufficiently formed mold on the mold unloading apparatus to the predetermined position on the mold unloading apparatus by feeding the unmolded mold to the predetermined position on the upstream side of the cushion cylinder. A frame feed positioning device and a mold 1 frame fed to a predetermined position by the frame feed positioning device are conveyed by a pusher cylinder. And is characterized in that provided a frame return device has a function of returning to the position of less than the feed.

It is preferable that this frame returning device includes a cylinder having a thrust force for pushing back not only the leading mold form but also the subsequent transfer form group on the pusher cylinder side.

In addition, the method for conveying a form group of the present invention made to solve the above-described problem is that the form group group arranged in series is sandwiched between a pusher cylinder and a cushion cylinder, and is equivalent to one mold form or a plurality of mold forms. In the method of transporting the formwork group that intermittently transports pitch by pitch, an electric cylinder or hydraulic cylinder with an expansion / contraction position recognition function and a midway stop function is used as the cushion cylinder, and the stop position on the extended end side of the cushion cylinder is set to the temperature of the formwork. When the mold is cold, the frame feeding positioning device provided on the upstream side of the cushion cylinder causes the missing mold on the positioning device and the mold carrying-out device to The positioning device is fed to a predetermined position by a frame return device provided on the upstream side of the cushion cylinder. The mold, is characterized in that the return to the position of less than conveyed feeding to at pusher cylinder.

Depending on the position of the cylinder head at the effective end of the cushion cylinder, switching between the frame feed process that does not return the frame when the mold has been thermally expanded and the frame feed process that returns the frame when the mold is cold is performed. It is preferable to carry out.

Also, with the cylinder cylinder rod contraction end as the original position when starting the equipment, the cylinder head position when the cushion cylinder rod is extended in the first step of startup, and the cushion cylinder rod extension when restarting after a certain period of time has elapsed The cylinder head position at the time is the mold position when the most thermal expansion is set in advance, and from the next process, the extended end position of the cushion cylinder is the feed end of the mold form sent in the previous process. Preferably, the position is calculated from the position of the effective end of the cushion cylinder.

In a conventional formwork group transfer device, when the distance between the pusher cylinder and the cushion cylinder is long and the number of transfer formwork groups arranged in series is large, the amount of variation in the gap between the formwork due to thermal expansion is very large. Immediately after the start of the operation of a facility with a low temperature, the gap between the molds becomes the largest, and the clearance time at low temperatures also becomes very large, so in large high-speed lines, within a predetermined process time, Although it is difficult to complete the operation, according to the conveyance device and conveyance method of the mold group of the present invention, by using the control to make the gap between the molds constant, the operation time of each actuator is mischievous. It is possible to secure a stable operation time without speeding up.

This application is based on Japanese Patent Application No. 2016-108165 filed on May 31, 2016 in Japan, the contents of which form part of the present application.
The present invention will also be more fully understood from the following detailed description. However, the detailed description and specific examples are preferred embodiments of the present invention and are described for illustrative purposes only. This is because various changes and modifications will be apparent to those skilled in the art from this detailed description.
The applicant does not intend to contribute any of the described embodiments to the public, and the disclosed modifications and alternatives that may not be included in the scope of the claims are equivalent. It is part of the invention under discussion.
In this specification or in the claims, the use of nouns and similar directives should be interpreted to include both the singular and the plural unless specifically stated otherwise or clearly denied by context. The use of any examples or exemplary terms provided herein (eg, “etc.”) is merely intended to facilitate the description of the invention and is not specifically recited in the claims. As long as it does not limit the scope of the present invention.

It is a front view in the structure of this invention, Comprising: It is a clearance gap related figure at the time of a formwork high temperature and low temperature. FIG. 2 is a plan view showing the structure of the present invention (in the direction of arrows AA in FIG. 1). It is a top view (BB arrow of FIG. 1) which shows the structure of this invention. It is a front view which shows the apparatus structure by the side of the pusher of this invention. It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 1 at the time of moldwork high temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 2 at the time of moldwork high temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 3 at the time of moldwork high temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 4 at the time of formwork high temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 5 at the time of moldwork high temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 1 at the time of formwork low temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 2 at the time of formwork low temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 3 at the time of formwork low temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 4 at the time of formwork low temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 5 at the time of formwork low temperature). It is a front view which shows the apparatus structure by the side of the cushion of this invention (formwork feed state figure 6 at the time of formwork low temperature). It is a front view in the conventional structure, Comprising: It is a clearance gap related figure at the time of mold form high temperature and low temperature. It is a front view which shows the apparatus structure of the conventional pusher side. It is a front view (formwork feeding state figure 1) which shows the conventional device structure of the cushion side. It is a front view (formwork feeding state figure 2) which shows the conventional device structure of the cushion side. It is a front view (formwork feed state figure 3) which shows the conventional device structure of the cushion side. It is a front view (formwork feed state diagram 4) which shows the conventional device structure of the cushion side. It is a front view (formwork feed state diagram 5) which shows the conventional cushion side device structure.

Hereinafter, embodiments of the present invention will be described. First, a conventional form feed will be described with reference to FIGS. 16 to 22.
As shown in FIGS. 16 and 17, the mold 101 is carried on a mold carriage 102 having a longer dimension than the mold 101. The conveyance form group 103 arranged in series is conveyed in a state where the form carriages 102 are in contact with each other.

Traversers

106 and 107 for carrying in and out the mold 101 one by one in the perpendicular direction are arranged on the carry-in side 104 and the carry-out side 105 of the transport mold group 103 arranged in series.

A pusher is used to push the mold 101 on the carry-in traverser 106 downstream by one frame, and to place the leading mold 109 of the transport mold group 103 staying on the fixed rail 108 on the carry-out traverser 107. A pusher device 110, which is a cylinder, and a cushion device 111, which is a cushion cylinder, are arranged opposite to the outside of the conveyance mold group 103.

Each of the

traversers

106 and 107 to be loaded / unloaded has a mold carriage holding means 112 for positioning the mold 101 to be loaded, and on the downstream side of the carry-in traverser 106, derailment due to reverse running of the mold 101 is prevented. A derailment prevention stopper 113 is provided (see FIG. 16). The derailment prevention stopper 113 is lowered when the pusher device 110 feeds one frame 101, and is raised by a one-frame feed completion signal of the pusher device 110, thereby preventing reverse movement of the mold 101 (see FIG. 17).

The standard for feeding the mold 101 by the pusher device 110 is, for example, the mold 114 carried out from the carry-in traverser 106 (see FIG. 17). If there is a mold 101 that is desired to be accurately stopped at a predetermined stop position in the intermediate portion of the conveying mold group 103 staying on the fixed rail 108, the mold 101 may be used as a feed reference. The “feeding reference” is a form serving as a reference for the moving distance when the pusher device 110 sends the form 101.

In order to load the mold 101 loaded on the carry-in traverser 106 between the transfer molds 103 arranged in series with the pusher device 110, the return end of the cylinder head 115 of the pusher device 110 and the carry-in traverser 106 are A gap a is provided between the molds 101, and a gap b is provided between the mold 101 on the carry-in side traverser 106 and the mold 114 used as a reference for transporting from the carry-in traverser 106 (see FIG. 17). The “return end” refers to a position where a pusher cylinder (a pusher device) or the like has returned after being extended for feeding a formwork.

The cushion device 111 side stays on the fixed rail 108 in order to carry out the mold 101 loaded on the carry-out side traverser 107 from between the transfer mold group 103 arranged in series and the cushion device 111. A gap d is provided between the leading mold 109 of the conveying mold group 103 and the mold 101 on the carry-out traverser 107, and the effective end of the mold 101 on the carry-out traverser 107 and the cylinder head 116 of the cushion device 111 is provided. A gap e is provided between them (see FIG. 21).

Since the mold carriage 102 in operation is thermally expanded by heating, the installation pitch of the carry-in traverser 106 and the carry-out traverser 107 needs to be determined by the dimensions of the mold carriage 102 when thermally expanded. However, because the reference for feeding the mold 101 by the pusher device 110 is the mold 114 that has been carried out from the carry-in traverser 106, the mold 101 stays on the fixed rail 108 when the mold 101 is cold when the equipment is started. The leading mold 109 in the conveyance mold group 103 is not fed. The length that is not fed is the amount of change in length L due to thermal expansion of the formwork carriage 102 = the amount of change 1 (el) of the frame x the number of frames mounted on the fixed rail 108 (see FIGS. 16, 18, and 19). .

The leading mold 109 of the conveying mold group 103 staying on the fixed rail 108 that has become insufficiently fed is clamped by a clamping device 117, and a convex portion 118 provided at the lower part of the mold carriage 102 is formed. Insert and push out to a predetermined position. Further, the mold 109 pushes the mold 101 on the carry-out side traverser 107 forward. It is to be noted that derailment due to the first run of the mold 109 (moving to the carry-out side) when the cart of the carry-out side traverser 107 is on the unillustrated destination end side is prevented. When the convex part 118 is not provided at the lower part of the formwork carriage 102, the part sandwiched by the sandwiching type clamping device 117 may be used as the formwork truck axle 120. By this step, a gap c is generated between the leading mold 109 of the conveying mold group 103 staying on the fixed rail 108 and the pusher-side mold 121. This gap c is adjusted to a minimum dimension at the time of mold thermal expansion. In a state where the mold 101 at the time of starting the equipment is cold, this gap is c + L (see FIG. 20). Note that the “bound end side” refers to a position where the formwork is unloaded by the unloading-side traverser.

Further, in order to provide a gap d between the leading mold 109 of the conveyance mold group 103 and the mold 101 loaded onto the carry-out traverser 107, the mold 101 on the carry-out traverser 107 is moved to the carry-out traverser 107. The formwork carriage holding means 112 mounted on 107 is fed to a predetermined position of the carry-out side traverser 107. The mold 101 is held in that position until it is unloaded by a pusher device (not shown) downstream of the unloading-side traverser 107 (see FIG. 21).

The formwork carriage holding means 112 has a force to push the roller 112a upward by a spring (not shown) housed in the case 112b from below, and the formwork carriage 102 of the formwork 101 on the carry-out side traverser 107. By pushing up the corner of the convex portion 118, the mold 101 on the carry-out side traverser 107 can be sent to a predetermined position. The formwork carriage holding means 112 may send the formwork in another known configuration.

Similarly, the formwork carriage holding means 112 mounted on the carry-in side traverser 106 transfers the formwork 101 carried from an upstream pusher device (not shown) at the return end of the carry-in side traverser 106 (not shown). It feeds to a predetermined position and holds the mold 101 at that position until it is carried out by the pusher device 110 (see FIG. 17).

In order to secure the gap described above, after the feeding process in the pusher device 110 is completed, and before the process of pushing out the two molds 122 that are not fed by the clamping device 117, the gap c (c + L ), The cylinder head 116 of the cushion device 111 is moved to the side where the rod contracts by the distance of d and e. This process is referred to as a re-effective process of the cushion device 111 (see FIGS. 19, 20, and 21). The gap e is a gap between the mold frame 101 on the carry-out side traverser 107 and the cylinder head 116 of the cushion device 111 after re-operation, which is sent to a predetermined position by the mold carriage holding means 112 (FIG. 21).

In this way, after securing a state where there is a gap between the leading mold 109 of the conveyance mold group 103 and the cylinder head 116 of the cushion device 111, the mold 101 on the carry-out side traverser 107 is unloaded. The side traverser 107 carries out the pusher device 110 and the cushion device 111 in a direction perpendicular to the nipping and feeding direction.

In the case of nipping and feeding by the pusher device 110 and the cushion device 111, in the conventional formwork feeding device, the clearance a + b between the cylinder head 115 of the pusher device 110 and the cylinder head 116 of the cushioning device 111 + c when the mold is hot or the formwork When the temperature is low (c + L) + d is moved at a low speed, the clearance is eliminated and the cylinder head 116 of the cushion device 111 is retracted (specifically, the OFF signal of the cushion head return end detection switch). It is controlled to carry. When the number of molds in the transport mold group 103 is large, the inter-frame gap L when the mold 101 is cold becomes very large. Therefore, when the low speed time becomes long, there arises a problem that the form feed cannot be completed within a predetermined process time. In order to avoid an impact caused by the collision of the formwork carriage 102, the speed cannot be increased at a low speed. Therefore, in order to complete the form feed within a predetermined process time, it is necessary to increase the acceleration / deceleration speed and the high speed speed. For this purpose, it is necessary to improve the capabilities of the pusher device 110 and the cushion device 111.

Up to now, the capacity increase of the pusher device 110 and the cushion device 111 only for the state where the mold 101 at the time of starting the equipment is cooled was regarded as a margin of the facility. However, in recent years when energy conservation is screamed, the above margin is wasted. It has become necessary to change awareness.

Further, conventionally, a hydraulic cylinder 123 has been adopted for the pusher device 110 and the cushion device 111 as an actuator having a large thrust. Therefore, the cylinder stroke is fixed and the thrust of the hydraulic cylinder 123 is very large. When the stroke of the hydraulic cylinder 123 of the cushion device 111 is selected according to the time when the mold 101 is cold, control is performed so that the hydraulic cylinder 123 stops at an arbitrary position in the middle of the stroke of the hydraulic cylinder 123 according to the thermal expansion of the mold carriage 102. Is difficult and sometimes out of control. In the case of not stopping at the midway stop position, there is a concern that the thermally expanded formwork carriage 102 is pushed back and equipment such as the derailment prevention stopper 113 is damaged. However, recently, the lineup of electric cylinders 23 having a large thrust has become abundant, and the electric cylinders 23 can detect the position of the cylinder head 16 using an encoder or the like. For this reason, the stroke of the electric cylinder 23 of the cushion device 11 is selected according to when the mold 1 is cooled, and is stopped at an arbitrary position in the middle of the stroke of the electric cylinder 23 according to the thermal expansion of the mold carriage 2. Control has become easier.

The structure and operation of the present invention will be described below with reference to FIGS.
Unlike the conventional structure, in the conveyance device for the form group of the present invention, the position of the cylinder head 16 can be detected by the cushion device (cushion cylinder) 11 by the expansion / contraction position recognition means (extension / contraction position recognition function) such as an encoder. An electric cylinder 23 capable of stopping the cylinder head 16 halfway is used. Further, the clamping device 17 of the sandwiching method attached to the lower part of the leading mold 9 of the conveying mold group 3 staying on the fixed rail 8 in front of the carry-out side traverser (mold conveying apparatus) 7 has a conventional structure. In addition, a frame returning device 24 is provided for returning the leading mold 9 of the conveyance mold group 3 to the pusher device (pusher cylinder) 10 side. This clamping system (positioning device for frame feeding) 17 feeds the missing mold frame to a predetermined position so that the missing mold frame on the mold unloading apparatus can be moved on the mold unloading apparatus. A frame feeding positioning device having a function of feeding to a predetermined position. Further, the frame returning device 24 is a frame returning device having a function of returning one frame of the mold, which has been fed to a predetermined position by the frame feeding positioning device, to a position where the frame is transported by the pusher cylinder. The frame return device 24 has a claw that can be engaged with and released from the mold carriage 2, and is a device that pulls the mold 9 back to the pusher device by the cylinder 25 through the claw. Since the configuration for engaging and releasing the engagement with the formwork carriage 2 may be a known configuration, a detailed description thereof will be omitted. By detecting the position of the cylinder head 16 by the expansion / contraction position recognition means, the position of the cylinder head 16 at the time of conveyance can be accurately stored when the conveyance mold group 3 is intermittently conveyed. Therefore, the position of the cylinder head 16 at the start of conveyance of the next cycle can be accurately set. The expansion / contraction position recognizing means may be known means such as an encoder, a linear scale, a laser displacement meter, and a porcelain displacement meter. In addition, the electric cylinder or hydraulic cylinder with the expansion / contraction position recognition function may include the expansion / contraction position recognition means as a separate body instead of being integrated. That is, expansion / contraction position recognition means that can measure the position of the cylinder head of the electric cylinder may be installed in the carry-out side traverser, for example.

When the electric cylinder 23 is used for the cushion device 11, the pusher device 10 generally uses the electric cylinder 23 of the same size, but it is also possible to use the pusher device 110 using the hydraulic cylinder 123 having a conventional structure. is there. Further, instead of the electric cylinder 23, a hydraulic cylinder with an expansion / contraction position recognition function and a halfway stop function may be used for the cushion device 11.

Switching between the frame feeding process when the heated and thermally expanded mold 1 is at a high temperature and the frame feeding process when the mold 1 is cold at the time of starting the equipment has extended the pusher device 10 (at the end of the travel). ) The position of the cylinder head 16 at the effective end of the cushion device 11 (see FIGS. 6 and 11) is stored, and the position of the cylinder head 16 of the cushion device 11 is set in advance when attempting to feed the frame in the next process. When the position of the cylinder head 16 of the cushion device 11 is less than the threshold as a frame feeding process in a state in which the mold 1 is cooled when it has come out to the pusher device 10 side more than the predetermined threshold, the mold is 1 Frame feeding process at high temperature.

The heated form 1 cools as the equipment stoppage period elapses, but the cooled formwork 1 immediately after the equipment start-up may be heated by the amount of heat such as pouring, and may expand even during the equipment stoppage period. is there. Therefore, it is impossible to confirm and predict the degree of cooling of the mold 1 when the equipment is started up and when the equipment is temporarily stopped and restarted after a predetermined time. For this reason, the rod contraction end of the cushion device 11 is set as the original position when starting the equipment. The cylinder head 16 position when the rod of the cushion device 11 was extended at the start of the starting process and at the time of restart after a predetermined time had been set in advance. As for the formwork, the cylinder form 16 of the cushion device 11 prevents the conveying formwork group 3 staying on the fixed rail 8 from being pushed back to the pusher device 10 side. From the next step, the cylinder head 16 position at the rod extension end of the cushion device 11 is set to a position calculated from the feed end (effective end of the cushion device 11) position of the mold 9 sent in the previous step.

The return end position based on the storage of the effective end position of the cylinder head 16 of the cushion device 11 is the stored effective end position of the previous cycle + the formwork length−the gap d. The heated and thermally expanded formwork 1 The frame feed process at high temperature is the same as that of the conventional structure, and the frame return device 24 stands by in an open state (not engaged with the formwork cart) and operates. do not do. That is, as shown in FIGS. 5 to 9, the mold 1 is placed on the mold carriage 2 having a longer dimension than the mold 1 and conveyed. The conveyance form group 3 arranged in series is conveyed in a state where the form carriages 2 are in contact with each other.

Traversers 6 and 7 for loading and unloading the mold 1 one frame at a time in the perpendicular direction are arranged on the loading side 4 and the unloading side 5 of the conveyance mold group 3 arranged in series. The formwork 1 on the carry-in traverser (formwork transfer device) 6 is pushed downstream by one frame, and the leading formwork 9 of the transfer formwork group 3 staying on the fixed rail 8 is placed on the carry-out traverser 7. For this reason, the pusher device 10 and the cushion device 11 are arranged opposite to the outside of the conveying mold group 3. Each of the

traversers

6 and 7 to be carried in / out has a formwork carriage holding means 12 for positioning the formwork 1 to be loaded. A derailment prevention stopper 13 for preventing derailment due to reverse running of the mold 1 is provided on the downstream side of the carry-in side traverser 6 (see FIG. 1). The derailment prevention stopper 13 is lowered when the frame 1 is fed by the pusher device 10 and is raised by a one-frame feed completion signal of the pusher device 10 to prevent the mold 1 from running backward (see FIG. 4).

The feed standard of the mold 1 by the pusher device 10 is, for example, the mold 14 carried out from the carry-in side traverser 6 (see FIG. 4). When there is a mold 1 that is desired to be accurately stopped at a predetermined stop position in an intermediate portion of the conveying mold group 3 staying on the fixed rail 8, the mold 1 may be used as a feed reference.

In order to load the mold 1 loaded on the carry-in traverser 6 between the transfer mold groups 3 arranged in series with the pusher device 10, the return end of the cylinder head 15 of the pusher device 10 and the carry-in traverser 6 A gap a is provided between the molds 1, and a gap b is provided between the mold 1 on the carry-in traverser 6 and the mold 14 used as a reference for transporting from the carry-in traverser 6 (see FIG. 4).

The cushion device 11 side stays on the fixed rail 8 in order to carry out the mold 1 loaded on the carry-out side traverser 7 from between the conveyance mold group 3 arranged in series and the cushion device 11. A gap d is provided between the leading mold 9 of the conveying mold group 3 and the mold 1 on the carry-out traverser 7, and the effective end of the mold 1 on the carry-out traverser 7 and the cylinder head 16 of the cushion device 11. A gap e is provided between them. (See Figure 8)

Since the mold carriage 2 in operation is thermally expanded by heating, the installation pitch of the carry-in side traverser 6 and the carry-out side traverser 7 needs to be determined by the dimensions of the mold carriage 2 when thermally expanded. However, since the feed standard of the mold 1 by the pusher device 10 is the mold 14 that has been carried out from the carry-in traverser 6, the conveyance mold group staying on the fixed rail 8 by the gap c at the time of mold thermal expansion. 3, the top formwork 9 is not fed (see FIGS. 1, 5 and 6). The position of the cylinder head 16 of the cushion device 11 at this time (see FIG. 6) is stored, and the position of the cylinder head 16 of the cushion device 11 is set in advance when attempting to feed the frame in the next process. When the position of the cylinder head 16 of the cushion device 11 is less than the threshold as a frame feeding process in a state where the mold 1 is cooled when it is out of the pusher device 10 side or more, the mold 1 is hot. The time frame feeding process.

The leading mold 9 of the conveying mold group 3 staying on the fixed rail 8 that has not been fed is removed from the lower part of the mold carriage 2 by the clamping device 17 of the sandwiching method. Insert and push out to a predetermined position. The mold 9 pushes the mold 1 on the carry-out traverser 7 forward. It is to be noted that derailment due to the advance of the mold 9 when the carriage of the carry-out side traverser 7 is on the outgoing side 19 is prevented. When the convex part 18 is not provided in the lower part of the formwork carriage 2, the part sandwiched by the sandwiching type clamping device 17 may be used as the formwork truck axle 20. By this step, a gap c is generated between the leading mold 9 of the conveying mold group 3 staying on the fixed rail 8 and the pusher-side mold 21. The gap c is adjusted to a minimum dimension during the thermal expansion of the mold (see FIG. 7).

Furthermore, in order to provide a gap d between the leading mold 9 of the conveyance mold group 3 and the mold 1 loaded onto the carry-out traverser 7, the mold 1 on the carry-out traverser 7 is connected to the carry-out traverser. 7 is sent to a predetermined position of the carry-out side traverser 7 and held at that position until it is carried out by a pusher device (not shown) downstream of the carry-out side traverser 7 (see FIG. 8).

The formwork carriage holding means 12 has a force to push up the roller 12a upward by a spring (not shown) accommodated in the case 12b from below, and is provided on the carry-out side traverser 7 sent by the pinching type clamping device 17. By pushing up the corner of the convex portion 18 of the formwork carriage 2 of the formwork 1, the formwork 1 on the carry-out side traverser 7 can be sent to a predetermined position.

Similarly, the formwork carriage holding means 12 mounted on the carry-in side traverser 6 transfers the formwork 1 loaded from an upstream pusher device (not shown) at the return end 26 of the carry-in side traverser 6 to a predetermined value of the carry-in side traverser 6. The mold 1 is held at that position until it is fed to the position and carried out by the pusher device 10 (see FIG. 4).

In order to secure the gap described above, after the feeding process in the pusher device 10 is completed, and before the step of pushing out the mold 22 without feeding in the clamping system 17, the gaps c, d, e For this distance, the cylinder head 16 of the cushion device 11 is moved to the side where the rod contracts. This process is referred to as a re-effecting process of the cushion device 11 (see FIGS. 6, 7 and 8). The gap e is a gap between the mold 1 on the carry-out side traverser 7 sent to a predetermined position by the mold carriage holding means 12 and the cylinder head 16 of the cushion device 11 after reactivation (FIG. 8). reference).

Thus, after ensuring the state which has the clearance gap between the head formwork 9 of the conveyance formwork group 3, and the cylinder head 16 of the cushion apparatus 11, the formwork 1 on the carrying-out side traverser 7 is carried out. The side traverser 7 carries out the pusher device 10 and the cushion device 11 in a direction perpendicular to the sandwiching feed direction.

Next, the frame feeding process in a state where the mold 1 at the time of starting the equipment is cooled will be described with reference to FIGS. The process of sending the mold 1 to the feed reference by the pusher device 10 is the same as the process of feeding the heated and thermally expanded mold 1 at a high temperature. The length change amount L due to thermal expansion of the mold carriage 2 is L = 1 frame change amount l (el) × the number of frames mounted on the fixed rail 8. Therefore, the fixed amount is fixed when the mold 1 is cold. The leading mold 9 of the conveying mold group 3 staying on the rail 8 is short of the maximum gap c + L when the mold is cold (see FIGS. 11 and 12).

The position of the cylinder head 16 of the cushion device 11 at this time (see FIG. 11) is stored, and the position of the cylinder head 16 of the cushion device 11 is set in advance when the next frame feed is to be performed. When the position of the cylinder head 16 of the cushion device 11 is less than the threshold value as a frame feeding process in a state where the mold 1 is cold when it has come out to the pusher device 10 side, the mold 1 has a high temperature. The frame feeding process.

The process of feeding the mold 1 to a predetermined position of the carry-out side traverser 7 by the clamping device 17 of the sandwiching method and the formwork carriage holding means 12 mounted on the carry-out side traverser 7 is also heated and thermally expanded. The same as the time frame feeding process. The leading mold 9 (see FIG. 13) of the conveyance mold group 3 that has been fed by the clamping system 17 of the sandwiching method and the maximum gap c + L gap at the time of mold form low temperature is the gap L by the frame return device 24. Returned to the pusher device 10 side (see FIG. 14). After the mold 1 loaded on the unloading side traverser 7 is unloaded to the leading end 19 side, the cylinder head 16 of the cushion device 11 is a position calculated from the storage of the effective end position of the previous cycle (cushion return stroke Lmax = type Return to cushion return stroke Lmin at the time of high frame temperature + length change amount L) due to thermal expansion of formwork carriage 2.

Basically, the frame return device 24 returns only the first mold frame 9 and 1 frame of the conveyance mold group 3, but the conveyance mold group 3 on the pusher device 10 side also holds the clamping device 17 of the sandwiching method. The frame returning device 24 is a cylinder having a thrust force for pushing back not only the leading mold 9 but also the conveying mold group 3, as the leading mold 9 pushed in may move downstream. 25 is used.

Further, the frame return position by the frame return device 24 is a position where the formwork 1 stops at the length of the formwork cart 2 in a state where the mold 1 is cooled to room temperature, so that the formwork cart 2 that is thermally expanded halfway is returned. In this case, the stroke end of the cylinder 25 may not be reached even if the gap c at the time of mold form low temperature assumed at the stroke end of the cylinder 25 is zero. In this case, since the thrust of the cylinder 25 is applied to the derailment prevention stopper 13 by the frame return, the derailment prevention stopper 13 needs to have a structure that can withstand the thrust of the frame return device 24.

In the mold carriage 2 which is thermally expanded halfway, the effective end of the cushion device 11 detected by an encoder or the like is detected so that the thrust of the cylinder 25 is not applied to the derailment prevention stopper 13 on the pusher device 10 side by returning the frame. Control is performed to switch between the frame feeding process when the mold 1 is heated and thermally expanded depending on the position of the cylinder head 16 and when the mold 1 is cold at the time of starting the equipment. The return end position based on the storage of the effective end position of the cylinder head 16 of the cushion device 11 is the stored effective end position of the previous cycle + the formwork length−the gap e.

In this way, by controlling the return end position of the cylinder head 16 of the cushion device 11, the amount of change L in length due to the thermal expansion of the mold carriage 2 that occurs when the mold 1 is cold is changed by 1 frame. It is possible to eliminate the influence of the quantity l × the number of mounting frames on the fixed rail 8.

Hereinafter, main symbols used in this specification and the drawings will be collectively shown.
DESCRIPTION OF SYMBOLS 1 Formwork 2 Formwork cart 3 Conveyance formwork group 4 Carry-in side 5 Carry-out side 6 Carry-in side traverser 7 Carry-out side traverser 8 Fixed rail 9 Leading formwork 10 Pusher device 11 Cushion device 12 Formwork cart holding means 12a Roller 12b Case 13 Derailment Prevention Stopper 14 Unloaded Form 15 Cylinder Head 16 Cylinder Head 17 Clamping Clamping Device 18 Convex 19 Traveling End Side 20 Formwork Dolly Axle 21 Pusher Side Form Form 22 Insufficient Form Form 23 Electric Cylinder 24 Frame Return Device 25 Cylinder 26 Return end 101 Formwork 102 Formwork cart 103 Conveying formwork group 104 Loading side 105 Unloading side 106 Loading side traverser 107 Unloading side traverser 108 Fixed rail 109 Leading formwork 110 Pusher device 111 Cushion device 112 Formwork cart Holding means 112 Roller 112b case 113 derailment stopper 114 out the mold 115 cylinder head 116 mold 123 hydraulic cylinder of the cylinder head 117 sandwiching method clamping device 118 protrusion 120 formwork carriage axle 121 pusher side mold 122 less than feed

Claims

In a formwork group conveying apparatus that sandwiches formwork groups arranged in series between a pusher cylinder and a cushion cylinder and intermittently conveys one form or multiple formwork pitches,
As the cushion cylinder, it is possible to arbitrarily change the stop position on the extended end side, and includes an electric cylinder or a hydraulic cylinder with an expansion / contraction position recognition function and a halfway stop function,
A frame feed having a function of feeding an insufficient formwork on the formwork unloading device to a predetermined position on the formwork unloading device by feeding an insufficient formwork to a predetermined position on the upstream side of the cushion cylinder. Positioning device, and a frame returning device having a function of returning one frame, which has been fed to a predetermined position by this frame feeding positioning device, to an unfeed position conveyed by a pusher cylinder A conveyance device for a form group.
2. The apparatus for transporting a form group according to claim 1, wherein the frame returning apparatus includes a cylinder having a thrust to push back not only the leading form form but also the subsequent form group on the pusher cylinder side.
In a method for conveying a form group which sandwiches form groups arranged in series between a pusher cylinder and a cushion cylinder and intermittently conveys one form frame or a plurality of form frames at a time,
Using an electric cylinder or hydraulic cylinder with an expansion / contraction position recognition function and a halfway stop function as the cushion cylinder, changing the stop position on the extended end side of the cushion cylinder according to the temperature of the mold,
In a state where the mold is cold, the frame feed positioning device provided on the upstream side of the cushion cylinder feeds the missing mold on the positioning device and the mold unloading device to a predetermined position, and then Further, the frame returning device provided on the upstream side of the cushion cylinder returns the formwork on the positioning device, which has been sent to a predetermined position, to a position where the pusher cylinder is transported. A method for conveying the formwork group.
Depending on the position of the cylinder head at the effective end of the cushion cylinder, the frame feeding process that does not return the frame when the formwork is thermally expanded and the frame feeding process that returns the frame when the mold is cold are switched. The method for transporting a form group according to claim 3
Cushion cylinder rod contraction end is the original position when starting the equipment, cylinder head position when cushion cylinder rod is extended in the first step of startup, and cushion cylinder rod extension when restarting after a certain period of time Cylinder head position is set in advance as the mold position at the time of the most thermal expansion. From the next step, the extended end position of the cushion cylinder is the feed end of the mold form sent in the previous process. The method for conveying a form group according to claim 3, wherein the position is calculated from the position of the effective end of the cushion cylinder.