JP2606724B2 - Middle frame demounting device for concrete forming form - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for attaching and detaching a middle frame of a mold for molding a hollow concrete product. The middle frame is also called the core or inner frame.

<Conventional technology> When a hollow part is made in a concrete product, a middle frame is inserted into a required position in the molding form and filled with concrete. At the mass production factory, the formwork is sent to the curing area, the filled concrete is cured for the required time, then the formwork is demolded,
Proceed to the mold assembly process line, remove the middle frame, separate the mold (open), take out the product concrete, send the removed product to the product storage area, clean the separated form, apply oil, reassemble it, The cleaned and oiled inner frame is charged and sent to the concrete loading site.

The formwork is placed on the underframe, for example, from the curing plant, from the mold release site → product demolding site → lubrication site → steel bar yard → mold demolition product demolding and die assembly process line, from the concrete input site Circulates to the nursery.

The middle frame that can be taken in and out manually or with a crane is taken out of the form at the mold release line of the form circulation line, and loaded into the form at the mold assembly site.

For large hollow products, when circulating the line in a horizontal posture instead of vertical, the hollow shaft of the formwork requires special equipment that can put a relatively heavy large middle frame horizontally into and out of the required position of the formwork. . Then, at the position where the dedicated equipment is located, the above-described process from separating the mold to forming the mold is completed and sent to the concrete loading site.

<Problems to be Solved by the Invention> Mass production equipment for concrete products having no hollow portion is a flow line system that circulates a formwork, and has high productivity.

However, in the case of a hollow product, productivity decreases because extra time is required in a mold unloading place or a mold unloading place where a middle frame is manually put in and out.

Even more, when circulating a large hollow product, for example, a product form such as a sewage dark block, with the hollow shaft beside it, there is a special facility to put the middle frame into and out of the form, and then remove the product and mold. Since all operations of the assembling process are performed, the advantages of the running operation are lost, and productivity is significantly reduced.

In the past, it was said that productivity was unavoidable due to the special circumstances of large hollow products.

This invention overturns the conventional wisdom that not only large products but also all hollow products are naturally less productive than solid products, and even if a middle frame is used, it is equivalent to the case where a middle frame is unnecessary. It begins with the development of systems and devices that can increase productivity as issues.

<Means for Solving the Problems> The middle frame detaching device of the concrete molding formwork of the first invention is:
The undercarriage with the formwork in place is advanced in the direction perpendicular to the direction of removal of the middle frame in the formwork, and the processing station for the product demolding and mold assembly process with the front and rear of the middle frame unloading place and loading place added A formwork transport path that passes one after another, and a medium frame extracting device that is located outside the medium frame transport path, extracts the medium frame from the formwork of the medium frame extraction area, and transfers the medium frame to the medium frame transport path, A middle frame loading device which is located outside the middle frame transport path, picks up the middle frame on the transport path, and inserts the middle frame into the form of the middle frame loading entrance.

The second invention is further provided on the opposite side of the middle frame charging device with both the formwork and the middle frame interposed therebetween, and supports the leading end of the middle frame to be charged into the formwork and horizontally. A middle frame front end supporting device having a supporting arm that expands and contracts is provided.

A third embodiment of the present invention is a middle frame attaching / detaching apparatus for horizontally inserting / removing a middle frame of a cylindrical concrete product forming mold, wherein the target inner frame has a U-shaped or C-shaped main plate; And an auxiliary plate disposed in the notch portion of the inner frame. The inner frame has a purging mechanism such as a screw, a crank arm, a cam, etc. for separating and approaching the auxiliary plate to the inner surface of the product, and separation of the auxiliary plate. By providing a link mechanism provided so as to draw a part of the main frame connected to the left and right thereof inward, a pull-out engaging portion and a passive portion of the pursed shaft end are provided on the end surface of the middle frame. A detachable device head having an engaging member for engaging with the engaging portion and a rotary drive mechanism for rotating the passive portion, and a guide and drive for moving the head forward and backward in the insertion / removal direction. It is characterized by having a mechanism.

<Operation> According to the first invention, the middle frame detaching device for forming a large-sized concrete product having a horizontal hollow shaft breaks the conventional fixed concept in which both the removal and the insertion of the middle frame are performed. Into the inlet device. Before and after the conventional product demolding and mold assembling steps of the formwork circulation line, a new middle frame unloading step and a charging step were added. In other words, by making the middle frame processing an independent process equivalent to the formwork and product processing, the number of processing lines in the flow line increased by two places. , The line speed was almost the same as that of the product without the middle frame.

In order to realize this method, the present invention provides a middle frame transporting path which is arranged side by side with the form transporting path of the production line, and a middle frame extracting device, which is directed to a middle frame extracting place of the form transporting path, outside the same. A mid-frame charging device for entry was provided. In both devices, the middle frame can be transferred to the middle frame transport route and picked up, so the middle frame of the form that has reached the middle frame removal area is immediately transferred to the middle frame transport route by the middle frame removal device, Finishes the subsequent product demolding and mold assembling processes one after another and reaches the middle frame entrance.

By then, the inner frame has reached the front of the inner frame charging device via cleaning of its transport path, oiling station, and the like. Accordingly, the formwork that has arrived at the middle frame charging entrance is immediately charged with the middle frame and proceeds to the concrete charging site.

In this way, the processing stations of the new product demolding and mold assembly process line, starting from the middle frame unloading area and ending with the middle frame loading area, proceeded in parallel with each unit work of assembly work.

The second invention is to provide a middle frame front end support device on the opposite side of the middle frame charging device, and a horizontally extending and contracting support arm of this support device is inserted into the inside of the mold to advance the middle frame to be advanced into the mold. Since the front end is supported, both ends of the middle frame are supported by the support arm and the head of the loading device, so that the middle frame can be stably inserted into a required position in the mold.

It should be noted that the middle frame front / rear end support mechanism is provided on the mold side as in the related art.

The third invention is suitable as a middle frame extracting device and a loading device of the first invention, and also as a conventional middle frame removing device for both removal and loading. It is Applicant's Patent No. 935518
No. “core of concrete form” was applied to the inner mechanism of the inner frame, and furthermore, a pull-out engaging part and a purse bearing moving part were provided on the end surface of the inner frame. The pull-out engaging portion is used not only for pulling out the middle frame from the mold but also for pushing. The purse bearing moving part drives the inner structure of the inner frame to shrink or expand the inner frame.

As the middle frame attaching / detaching device, a purging mechanism inside the middle frame, an engaging portion on the end surface of the middle frame, a passive portion, an engaging material to the engaging portion,
There is a detachable device head having a drive mechanism for the passive unit, and a guide and drive mechanism for moving the head to extract and insert the middle frame.

In the case of removing the middle frame, the head on the guide mechanism is close to the end face of the middle frame, and the shaft end of the drive mechanism is engaged with the purse bearing moving portion of the middle frame and turned. This causes the pursed shaft in the middle frame to rotate, and the center of the lower surface of the middle frame and the entire length of the bottom plate are pulled up by a lifting mechanism appropriately combining any of screws, links, and gears.

The raised bottom plate pulls the middle frame side plate connected to the left and right a little inward through the link, so that the lower surface and the side surface of the middle frame are narrowed. With this, the lower surface and the side surfaces of the inner frame are separated from the concrete, but the upper surface of the inner frame is still attached. The adhesion between the ceiling plate on the upper surface of the middle frame and the product concrete comes off when the middle frame is forcibly extracted. However, as described later, if the sheet is easily peeled off by impact or vibration and then withdrawn, no scratch is formed on the product surface.

<Embodiment> FIG. 1 is a plan view showing an embodiment of the first and second inventions.
Is a formwork transport path, and 2 is an intermediate form transport path that passes through a lower place, and both of them intermittently feed the formwork M and the intermediate form N in the direction of the arrow. 2 and 3 show cross sections taken along lines AA and BB of FIG. 1, respectively.

The formwork M sent from the left side of FIG. 1 is on the fixed position of the underframe on the formwork transport path 1, but in FIG. 1 the underframe is omitted and only the formwork M is drawn. . A diagonal line is inserted in the middle frame N in the mold frame M for easy viewing. On the form transport route 1, a,
Six positions of b, c, d, e, f, and g are processing plants in the product demolding and mold assembling steps, and the mold M is stopped at each of them. a is a middle frame extraction place, b is a mold release place, c is a product demolding place, d is an oiling place,
e is a steel bar entrance, f is a mold yard, and g is a middle frame entrance. The middle frame transport path 2 also has an oiling station d '.

Outside the middle frame transportation path 2 along the middle frame extraction site a, there is a middle frame extraction device 3. The extraction device 3 includes a head 3a, a rail 3b for bringing the head 3a closer to the form M of the extraction site a, and a lifting cradle 3c hidden under the extracted middle frame N in FIG.
Is also included. As shown in FIG. 2, the elevating cradle 3c, which has been lifted from below, receives the middle frame N extracted from the form M at the position of the chain line 3c ', and descends to move the middle frame transport path (chain conveyor).
2 and the middle frame N is passed over to the standby position indicated by the solid line. The elevating pedestal 3c is dimensioned to freely move up and down between the rails 3b on both sides of the extracting device 3 and between the chains on both sides of the middle frame transport path 2.

The middle frame loading device 4 and the middle frame tip support device 5 face each other across the middle frame loading entrance g on the right side of FIG. The latter has a long support arm 5a that expands and contracts horizontally. The middle frame loading device 4 has the same structure as the middle frame unloading device 3, and its head 4a and rail 4b are both lifted and lowered provided at the intersection between the rail 4b and the middle frame transport path 2. The cradle 4c is also the same. FIG. 3, which is a cross-sectional view taken along the line BB of FIG.
2, except for the middle frame tip support device 5, which has the same structure as that of FIG. 2 and the stopper 6 is the same, but the drawing is omitted.

4 and 5 show the drawing frame end face of the middle frame N, and FIG. 6 shows the same longitudinal section. FIG. 7 shows the front surface of the head 3a of the middle frame extracting device. FIG. 8 shows a target product of this embodiment.

Next, the configuration and operation of this embodiment will be described in detail in the order of steps.

From the left side of FIG. 1, the formwork M sent by the formwork transport path 1 is first stopped at the middle form extraction area a. In order to stop exactly at the fixed position, sandwich the beam on the underside of the underframe P from front and back,
A positioning stopper 6 that stops while correcting the position is provided. This means that a pair of fluid pressure cylinders 6a, a crank portion 6b, and a stopper arm 6c as shown in FIG. 2 are set before and after the expected stop position of the beam of the underframe P, and a normal detection switch stops the approach of the underframe P. When notified, it activates and moves the underframe beam to the front and rear stopper arms.
Hold by 6c and stop at the right position.

Since the underframe P is accurately positioned in this manner, both the mold frame M and the middle frame N at the fixed positions on the upper surface stop at the correct positions. Therefore, when the head 3a of the middle frame extracting device that has been waiting at the solid line position in FIG. 2 advances to the chain line position 3a ', the engagement portion 7 for pulling out the end surface of the middle frame N (see FIGS. 4 to 6) The head 3a comes to a position where it can be properly engaged with the engaging member 10.

The middle frame N is a ceiling plate N ₁ and left and right side plates descending from the left and right.
A main plate having a U-shaped or C-shaped cross section composed of N ₃ and N ₃ and a bottom plate or an auxiliary plate N ₂ disposed between the lower ends of the left and right side plates, and the end surface thereof is, as shown in FIGS. as a lead engaging portion 7 of the third invention, the holes 7a hanging below the left and right of the middle frame ceiling board N _1, are lined up hooked frame 7b in the middle. Below them, the passive part 9 of the center frame pursed shaft 8 protrudes. The head 3a of the middle frame unloading device (the same applies to the charging device) which engages with them is shown in FIGS. 6 and 7, and is attached to the hook frame 7b at the center of the front end of the middle frame in FIG. An engaging member (pin) 10b to be inserted and a fluid pressure cylinder 11 for vertical movement thereof are attached, and an engaging member (horizontal shaft bar) 10a to be inserted into the left and right hanging holes 7a in FIG. In addition, by the engagement material 10a entering the hanging hole 7a,
Fine adjustment of the relative position between the extraction device head 3a and the middle frame N is also performed. And with a flange for striking the hooking frame 7b in Kakarigozai (pin) 10b, a ceiling plate N ₁ of pursed the inner frame N may be a means for peeling from the concrete.

Shaft 8 just below the hook frame 7b at the center of the end face of the middle frame N
In the same manner as the passive unit 9 described above, just below the engaging member (pin) 10b at the center of the front surface of the extraction device head 3a, there is a connection end 12a of the rotary drive mechanism 12 connected to the passive unit 9. When the engaging portion 7 and the engaging material 10 are engaged at the upper side, the passive portion 9 is at the lower side.
And the connection end 12a are engaged.

Then, when the motor 12b of the rotary drive mechanism 12 of the head 3a is turned, the pursed shaft 8 of the middle frame N rotates, and the respective female screws 13 are moved to the position 13 'of the chain line in FIG. Can be These into the internal thread 13, the link 14 which connects the bottom plate N ₂ of the lower surface central portion the entire length of the middle frame N is attached. Therefore, when the female screws 13, 13 at both ends are brought inward of the middle frame,
Bottom plate N ₂ is pulled up to the position of the N ₂ 'of Figure 6 chain line.

A state where the bottom plate N ₂ is pulled is illustrated in FIG. 5, this pulling, the left and right brackets standing on the bottom plate N ₂ 15, 1
5 upper left and right side plates N _3, the link connecting the reinforcing rib 18 of the N ₃ 16,1
6 works to draw the side plates N ₃ and N ₃ (the shoulders 19 of the ceiling plate N ₁ )
Bends). This narrows the middle frame N, and the left and right side plates N ₃ , N
₃ and the bottom plate N ₂ is peeled from the concrete products inner wall of the surrounding (shown in cross-section). Central portion of the ceiling plate N ₁ is still attached to the concrete.

Then, the extraction device head 3a is forcibly retracted, or the catching frame 7b is hit by the fluid pressure cylinder 11 of the engaging material 10 and the hitting piece added in particular, or the formwork is vibrated, and the ceiling is removed. after removing the plate N ₁ from the concrete draws middle frame N onto the middle frame transport path 2. The pulled out middle frame N is the second
Once temporarily supported by the roller stand 17 and the horizontal shaft bar 10a shown in the figure, the elevating pedestal 3c is raised to the position 3c ', and when the middle frame N is further pulled out, the middle frame N is placed on the elevating pedestal 3c. Appears.

Then lower the lifting pedestal 3c, and the middle frame N
After passing between 3b, it is put on the left and right chains of the middle frame transport path 2, and the receiving table 3c is lowered to the standby position.

This completes the extraction process at the middle frame extraction site a in FIG. At the same time, the formwork coming from the extraction place a is opened at the mold unloading place b, the product concrete is carried out of the formwork by the crane equipped with the vacuum adsorber at the product demolding place c, and the formwork is cleaned and painted at the oiling station d. Oil (release agent application) is performed,
In the rebar entrance e, the assembled rebar is put into the formwork by a crane. In the formwork f, the side plates and end plates of the open formwork are returned and fixed. Is inserted into the original form M as shown in FIG.

Since the middle frame N on the middle frame transport path 2 is only moved forward except for cleaning and oiling at the oiling station d ', the middle frame N is loaded into the original form M without delay. However, it is not necessary to limit the middle frame N to the same mold M.

 FIG. 3 shows the processing status at the middle frame entrance g.

The head 4a, the rail 4b, and the elevating cradle 4c of the middle frame loading device 4 have the same structure as the unloading device 3, and the operation is performed in the reverse order. That is, when the elevating cradle 4c scoops up the middle frame N on the middle frame transport path 2 to a predetermined loading height, the loading device head 4a advances and engages with it.

The pull-out engaging portion 7 on the end face of the middle frame N, that is, the hanging hole 7a,
An engaging member 10 of the head 3a, that is, a horizontal shaft 10
a, the head 4a is engaged with the end of the middle frame N just like the head 3a in FIGS. 2 and 6 in which the pin 10b is engaged.

The purse bearing moving part 9 of the middle frame N also engages with the rotation drive mechanism connecting end 12a of the head 4a at the same time. ,
Alternatively, it may be after the middle frame N has been placed in the mold M.

Now, the head 4a engaged with the end of the middle frame N on the elevating cradle 4c is moved to the third position.
When the middle frame N is placed on the roller stand 17, the elevating cradle 4c is lowered. Further advance the head 4a,
When the leading end of the middle frame N has entered the mold M to some extent, the horizontal shaft rod 10a at the leading end of the support arm 5a that greets it enters the hanging hole 7a on the end surface of the middle frame N. The horizontal shaft 10a is the same as that of the head 4a, and the suspension hole 7a is the same as that of the opposite end face of the middle frame N.

When the head 4a further moves forward, the support device 5 itself, which was initially forward, retreats in synchronization with this, and the support arm 5a continues to be retracted. In this way, the middle frame N has a horizontal shaft 10
It is suspended by a and inserted into the correct position of the formwork M.

In this middle frame charging entrance g, the mold M that has completed all of the product demolding and mold assembling steps is directed to the concrete loading site as before.

Although the embodiment has been described above, it goes without saying that the middle frame attaching / detaching apparatus of the first to third inventions can be variously changed and applied in accordance with the implementation conditions by the well-known technique of the engineer in charge. For example, it is possible to use the middle frame extraction place a and the mold release place b, or the mold release place b and the product demolding place c, or to perform the process at the same time, depending on the implementation conditions.

<Effects of the Invention> The first invention realizes, for the first time, a production method that can achieve the same productivity as a product that does not require a middle frame even when a middle frame for forming a hollow portion is used in a mass production factory for hollow concrete products.

According to the second invention, when the middle frame is charged into the mold in the first invention, the front end of the horizontally inserted middle frame is supported by the horizontally expandable and contractable supporting arms and is received into the mold, whereby the middle frame is charged. And improved accuracy.

The third invention is a unique middle frame purging mechanism, a driving mechanism thereof, and a forward / backward movement thereof as a middle frame detaching / attaching device for horizontally extracting / inserting / unloading / inserting the inner frame from the mold. The mechanism was developed. This makes it possible to carry out the middle frame withdrawing step and the charging step of the first invention in a required time balanced with other steps.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the first invention, and FIGS.
AA, BB cross-sectional enlarged view of the figure, FIGS. 4 and 5 are views of the drawer side end face before and after shrinking the middle frame, and FIG. 6 is a vertical section of the middle frame and a side surface of the extraction device head. FIG. 7 is a schematic view of the front of the head, and FIG. 8 is a perspective view of the concrete product (dark block) of the above embodiment. Road, 3 is a middle frame removal device, 3a is its head, 4 is a middle frame loading device, 5 is a middle frame tip support device, 7 is an engagement portion for pulling out, 9 is a purse bearing moving portion, and 10 is an engagement. Materials, 14 and 16 indicate links.

Continuation of front page (56) References JP-A-48-15912 (JP, A) JP-A-55-111212 (JP, A) JP-A-53-35720 (JP, A) JP-A-49-129713 (JP) JP-A-61-130008 (JP, A) JP-A-60-64804 (JP, A) JP-B-53-13485 (JP, B2)

Claims (3)

(57) [Claims] 1. A product demolding and molding method in which a frame on which a form is placed in a fixed position is advanced in a direction perpendicular to a direction in which a middle frame in the form is extracted, and a middle frame extracting place and a loading place are added before and after. A form transport route that stops at each processing station of the process one after another, and is located outside the middle frame transport route, and the middle frame is extracted from the form at the middle frame extraction place and transferred to the middle frame transport route. A frame unloading device, a middle frame loading device that is located outside the middle frame transport path, picks up the middle frame on the transport path, and charges the middle frame into the formwork of the middle frame loading entrance. Demounting device for concrete forming formwork. 2. The apparatus according to claim 1, further comprising a transport path for both the formwork and the middle frame, which is provided on a side opposite to the middle form loading apparatus, and which is mounted on the formwork. A middle frame detaching device comprising a middle frame front end support device having a support arm which supports a front end portion of a middle frame to be inserted and extends and contracts horizontally. 3. A middle frame attaching / detaching apparatus for horizontally inserting / removing a middle frame of a mold for forming a tubular concrete product, wherein the target middle frame includes a main plate having a U-shaped or C-shaped cross section and a cutout portion of the main plate. An auxiliary plate to be disposed, wherein the inner frame has a screw for separating and approaching the auxiliary plate to the inner surface of the product,
Equipped with a purging mechanism such as a crank arm and a cam, and a link mechanism provided to pull in a part of the main frame connected to the left and right sides of the auxiliary frame by separating the auxiliary plate. A detachable device head, comprising: an engagement portion for use; and a passive portion at the end of the pursed shaft, and having, outside the middle frame, an engagement member for the engagement portion and a rotation drive mechanism for rotating the passive portion. And a guide and drive mechanism for moving the head back and forth in the insertion / removal direction.