JPH0796514A - Core device of form for producing hollow block - Google Patents

Abstract

PURPOSE:To facilitate demolding and assembling by dispensing with the attachment and detachment of a core by connecting the one end hole part of a link to the intermediate connection hole of an arm and connecting the leading end connection hole of the arm and the non-deformation part of the skin of the core through an expansible and contractible mechanism. CONSTITUTION:A non-deformation part 55 is provided to the skin 50 of an elastic core becoming a round shape at the time of expansion and upper and lower separation parts 52,53 extending over the total length of the core and obliquely separated with respect to the outer periphery of the core are provided to a part of the outer periphery of the core. A link attaching metal fitting 52a is fixed to the inside of the upper separation part 52 and an arm 80 wherein a leading end connection hole 82 and an intermediate connection hole 85 are provided is provided to the inside of the lower separation part 53 obliquely upwardly. The intermediate connection hole 85 and the link attaching metal fitting 52a are connected in a freely rotatable manner by the link 60 while the non-deformation part 55 and the leading end connection hole 82 of the arm 80 are connected in a freely expansible and contractible manner by a expansible and contractible mechanism 100. By this constitution, demolding becomes easy and the penetration of fine concrete powder separated at the time of demolding into the core can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core device for a hollow body block manufacturing frame, which is useful for shortening the manufacturing time of the hollow body block and for labor-saving production.

[0002]

2. Description of the Related Art In a random order, there is a concrete mold core structure disclosed in Japanese Utility Model Publication No. 5-33301, which is shown in FIG. The core structure of this concrete formwork comprises an inverted U-shaped core frame 8 and an inverted trapezoidal flat plate frame 9 provided in the opening of the core frame 8 so that the core frame 8 can be housed inside. Between the flat plate frame 9 before and after the core and the ceiling part of the core, there is provided an elevating link 10 which is moved up and down by the operation of the operating rod 16 and which shows a front view and a side view in the lower part of the figure.
The contraction link 18 is axially supported above through the elongated hole of the base end part, the tip end part of the contraction link 18 is connected to the left and right side parts of the core frame 8, and the core frame 8 is linked with the elevating link. When the operating rods 16 of the elevating links 10 provided at the front and rear of the core are pushed down during demolding, the flat plate frame 9 rises and the core frame 8 contracts, so that the contracted core is fixed. , The forklift claws are inserted into the upper space of the flat plate frame 9, the core 7 is removed from the mold, the mold is opened, and the product is demolded. After closing
The core 7 is supported by the claws of the forklift to be transported, inserted into the mold and mounted, and then widened to assemble the mold. The applicant conducted an investigation, but found no core device for the hollow frame block manufacturing formwork, which does not require detachment of the core.

[0003]

A core device for a mold for manufacturing a hollow body block, which does not require detaching and attaching of the core, can be easily demolded and assembled in a short time, and can shorten the manufacturing time and save labor. To provide.

[0004]

In order to solve the above-mentioned problems, according to claim 1, an upper separation part and a lower separation part which can be sealed at the time of abutment are provided in a longitudinal direction of one side surface of a core outer skin. ,
An arm having a tip connecting hole and an intermediate connecting hole is fixed inside the lower separating portion, and one end of the link is rotatably pivotally attached to a link mounting metal fitting inside the upper separating portion, and the other end hole portion of the link is formed. In the hollow body block manufacturing form, characterized in that the intermediate connection hole of the arm is connected, and the tip connection hole of the arm and the non-deformable portion of the core outer shell are connected via an expansion / contraction mechanism. It constitutes a child device.

According to a second aspect of the present invention, there is provided an upper separation part and a lower separation part which can be sealed when they come into contact with one side of a core outer skin in a longitudinal direction of the core skin, and a link fitting inside the upper separation part and a lower separation part are provided. The link fittings on the inner side of the part are rotatably connected by a link, and the lower end connecting part of the link and the non-deformable part of the core skin are
A core device for a mold for manufacturing a hollow body block, which is characterized in that it is connected through an expansion / contraction mechanism.

According to a third aspect of the present invention, the expansion / contraction mechanism is a link mechanism for converting the rotational movement of the screw rod into the expansion / contraction movement, and the hollow body block manufacturing mold according to any one of the first and second aspects. It constitutes the core device of the frame.

In the fourth aspect, the expansion / contraction mechanism is a fluid actuator connected to the fluid pipe connecting means provided at the rear end of the core device, or an electric cylinder connected to the power supply means provided at the rear end of the core device. The core device of the mold for manufacturing a hollow body block according to claim 1 or 2 is configured.

According to a fifth aspect of the present invention, there is provided widening limiting means between the non-deformable portion and the upper separating portion and between the upper separating portion and the lower separating portion of the core. A core device for a mold for producing a hollow body block according to item 1 is constituted.

According to a sixth aspect of the present invention, the core device is supported by the rear supporting means so as to be movable in the upward / rearward / leftward / rightward directions. A core device of the mold (hereinafter referred to as a core device) is configured.

[0010]

In the core device according to the first aspect, when the expansion / contraction mechanism is operated, the arm is pulled toward the non-deformable portion, and the bending moment of the core outer skin (difference in length of the flexible portion) causes the lower side first. When the separating part separates from the upper separating part while avoiding sliding and displaces inward and upward, and the arm is further pulled, a pulling force acts on the link fitting via the link connected to the arm, and the upper separating part The part follows the lower separating part and is gradually displaced inward, so that the core shell is reduced so as to wrap the lower separating part in a V shape, and especially in the case of a small-diameter core. Therefore, demolding is facilitated, and intrusion of fine concrete powder, dust, etc., which has fallen off during demolding, into the core is reduced.
In addition, if the expansion / contraction mechanism is operated in reverse at the time of placing (when assembling the formwork and driving in concrete), the lower separation part will follow the upper separation part and expand to the outside, and at the final stage of expansion. The upper separation part and the lower separation part abut on each other while avoiding sliding, and the core width /
Return the height of the core to the normal size.

In the core device according to the second aspect, when the expansion / contraction mechanism is operated, the lower link mounting member is pulled toward the non-deformable portion, and the difference in bending moment of the core outer skin (the difference in length of the flexible portion). ), The lower separation part first separates from the upper separation part while avoiding sliding and is displaced inward and upward, and when the lower link mounting bracket is further pulled, the upper link mounting is performed via the linked link. A pulling force acts on the metal fittings, the upper separation part follows the lower separation part and is gradually displaced inward, and the core outer skin is contracted so that the lower separation part is wound in a V shape, especially the small diameter circle. The core device of the mold section can be smoothly reduced (widened). Therefore, demolding is facilitated, and intrusion of fine concrete powder, dust, etc., which has fallen off during demolding, into the core is reduced. At the time of pouring (when assembling the formwork and driving concrete)
If the expansion / reduction mechanism is operated in reverse, the lower separation part will follow the upper separation part and widen outward, and at the final stage of widening, the upper separation part and the lower separation part will contact while avoiding sliding. , Return the core width and core height to the normal dimensions.

According to a third aspect of the present invention, when the screw rod of the expansion / contraction mechanism is rotated in a predetermined direction, the output end is expanded and contracted by the link mechanism, and the link mechanism is swingably provided around the screw rod. The upper and lower separators are urged along the line that follows the optimal trajectory, and the core outer skin is reduced to a V shape.If the reverse rotation is performed, the upper and lower separators are urged and reduced along the line that follows the optimal trajectory. Return to the previous regular size. Since the expansion / contraction mechanism expands in a short time only by a simple turning operation, it becomes easy to install a pneumatic tool (impact wrench) or electric tool on hand or an automatic machine (automatic tightening / loosening machine) in the production line.

According to the present invention, the expansion / contraction mechanism is a fluid actuator having fluid pipe connecting means at the rear end of the core device or an electric cylinder having power receiving means at the rear end of the core device. A fluid pipe connecting means or a power receiving means protruding from one end of the slave device and a pressurized fluid pressure supply device or a power supply device provided on an intermittently moving production line (moving about every 2.5 minutes) may be connected. For example, the core expansion / contraction process can be performed within the stop time on the production line as in the expansion / contraction mechanism described above.

According to the present invention, the widening limiting means is provided between the non-deformable portion of the core and the inside of the upper separating portion and between the inside of the upper separating portion and the lower separating portion. The upper separation part and the lower separation part are separated accurately while avoiding sliding, preventing excessive core widening during core widening and without sliding the upper separation part and the lower separation part. Abut. Therefore, wear and excessive expansion of the packing can be avoided, and the reproducibility of the sealing of the separation portion can be maintained for a long time.

According to the sixth aspect of the present invention, the core device is supported from the rear side by the supporting means so as to be movable in the upward, forward, backward and leftward and rightward directions. Therefore, the core device is reduced during demolding (when the product is taken out of the mold). The child device remains supported on the mold and naturally moves in the direction with the least resistance when the product is extracted.
Therefore, demolding can be performed easily in a short time, wear and damage of the core outer skin are reduced, and durability is improved.

[0016]

1 to 12 show an embodiment of the present invention. FIG. 1 is a perspective view showing a schematic structure of the embodiment of the present invention and a mounting state on a mold, and FIG. 1 is a front view of the embodiment according to claim 1, FIG. 3 is an operation explanatory view of the embodiment according to claim 1, FIG. 4 is a front view of the embodiment according to claim 2, and FIG. 5 is an embodiment according to claim 2. FIG. 6 is a perspective view of the embodiment according to claim 3, FIG. 7 is a perspective view of the embodiment according to the fluid pressure according to claim 4, and FIG. 8 is a fluid pressure according to claim 4. 9 is an explanatory view of an electric embodiment according to claim 4, FIG. 10 is a front view of a widening limiting means according to claim 5, and FIG. 11 is related to claim 5. FIG. 12 is an explanatory view of the operation of the widening limiting means, FIG. 12 is an explanatory view of the supporting means according to claim 6, and FIG. 13 is an explanatory view of a conventional core device.

The configuration and operation of each embodiment will be described below with reference to FIGS.

FIG. 1 is a perspective view showing a schematic structure of the embodiment of the present invention and a state of being mounted on a mold. A hollow body block mold K shown by a thin line (hereinafter referred to as a mold) is shown in FIG. The hollow body block BL (shown by the chain double-dashed line) is manufactured upside down, and the bottom surface of the mold is the product upper surface. This figure shows the front and rear end plates 20 and 21 of the form K. In a state in which (one side plate is omitted) is opened in the direction of the chain line arrow, the core device N shows a partially cut-out internal structure, and the supporting means 500 described later is horizontally projected from the rear end plate 21 side of the form K. By this, it is supported so as to be movable in the upward, front-rear, and left-right directions. Reference numeral 10 in the drawing is an underframe of the formwork.

The core device N mounted on the form K as described above.
At the time of pouring, after operating the expansion / contraction mechanism 100 to widen the core device N, the side plates 30 and 30 and the front and rear end plates 20 and 21 are closed, and concrete is put in from the direction of the arrow A to insert the hollow body block BL. At the time of forming and demolding, the expansion / contraction mechanism 100 of the core device N is reversely operated to reduce the cross-sectional dimension of the core, and the core device N is left on the mold K in the direction of the arrow B toward the hollow body. The block BL is demolded. The sharp positioning pins p protruding from both end surfaces of the core device were fitted into the positioning holes ph provided at the corresponding positions of the end plates by closing the end plates 20 and 21 of the mold, and moved during the demolding. It is a positioning pin that returns the core device N to an appropriate position and holds it.

FIG. 2 is a front view of an embodiment according to claim 1, in which a non-deformable portion 55 is provided at a predetermined position of an elastic inner core 50 which becomes a round shape at the time of widening, and a full length is provided on a part of the outer periphery. An upper side separating part 52 and a lower side separating part 53 which are obliquely separated from the outer circumference, and a link mounting metal fitting 52a is fixed inside the upper side separating part 52, and a tip connecting hole 82 is formed inside the lower side separating part 53. Also, an arm 80 provided with an intermediate connecting hole 85 is provided so as to project obliquely upward, and the intermediate connecting hole 85 and the link mounting bracket 5 are provided.
2a are rotatably connected by a link 60, and the non-deformable portion 55 and the tip connecting hole 82 of the arm 80 are extendably and contractably connected through an expansion / contraction mechanism 100, and fixed to the non-deformable portion on the upper part of the core. The supporting frame 90 is fitted into the supporting means 500 described later with a predetermined gap G, and given a degree of freedom in the front-rear, left-right, and upward directions to the core device at the time of demolding to prevent the core device from slipping out. Configured to do so. In the present embodiment, the configuration of the core device having a round cross section is shown, but a core device such as an oval cross section or various square cross sections can be configured in substantially the same manner without departing from the idea of the invention. . In addition, reference numeral 56 in the drawing is a reinforcing member that gives the expansion / contraction operation a regularity.

FIG. 3 is an operation explanatory view of the embodiment according to claim 1, and shows a case where the core device N is reduced. When the rotary head 121 of the expansion / contraction mechanism 100 is rotated in a predetermined direction when the core device is contracted (when the mold is removed), the orthogonal joint 140 is urged to the left in the drawing to start pulling the arm 80, and the lower side. The separating portion 53 avoids sliding with the upper separating portion 52, separates and begins to bend inward and upward, and the link 60 also starts to rotate inward at the same time, but at this point, the upper separating portion 52 is still stopped. When is further attracted, a tensile force acts on the link fitting 52a via the link 60, the upper separation part 52 follows the lower separation part 53 and is displaced inward, and the core device is reduced to a square shape. To do. Therefore, when the hollow body block BL is slightly raised and pulled out at the time of demolding, the core device moves in the direction in which the resistance naturally decreases while remaining on the mold K, which facilitates demolding. . In addition, 50 A in the figure is a contour line of the core device before reduction.

Further, when the rotary head 121 of the expansion / contraction mechanism 100 is reversely rotated at the time of driving, the orthogonal joint 140 is urged to the right in the figure, and the arm 80 fixed to the lower separating portion 53 is moved to the right. The upper separating portion 52, which has been pushed and pulled via the link 60 connected to the intermediate connecting hole 85 of the arm 80, releases the tensile force, and the upper separating portion 52 side follows a trajectory opposite to that at the time of contraction. The width of the lower separating portion 53 starts to widen first, while the lower separating portion 53 is constrained by the radius of gyration of the link 60 during the process of widening. Therefore, the lower separating portion 53 expands and approaches while sliding along a trajectory avoiding contact with the upper separating portion 52 and sliding. By avoiding the above, the upper and lower separating portions 52 and 53 are brought into contact with each other to be sealed, and the cross section returns to the regular cross-sectional dimension shown by the chain double-dashed line 50A.

FIG. 4 is a front view of an embodiment according to claim 2, showing an embodiment particularly useful in a core device having a small diameter round cross section. A non-deformable portion 55 is provided at a predetermined position of an elastic core shell 50 that becomes a round shape when it is widened, and an upper separation portion 52 and a lower separation portion 53 are provided on a part of the outer circumference over the entire length and obliquely separated from the outer circumference. Is provided, a link mounting metal fitting 52a is fixed inside the upper separating portion 52, and a similar link mounting metal fitting 53a is fixed inside the lower separating portion 53 as well.
Thus, the two fittings 52a and 53a are rotatably connected to each other, and the non-deformable portion 55 and the link fittings 53a inside the lower separating portion 53 are connected to each other via the expansion / contraction mechanism 100. The support frame 90 is a support means 500 described later.
A predetermined gap G is provided on the core so that the core device can be fitted to the core device at the time of releasing the mold, and the core device is prevented from slipping out. The present embodiment has a structure that is particularly useful for reducing the core device of a small-diameter round-shaped cross section because the internal mechanism can be made small. The child can be configured in substantially the same manner. In addition, reference numeral 56 in the drawing is a reinforcing member that gives the expansion / contraction operation a regularity.

FIG. 5 is an operation explanatory view of the embodiment according to claim 2, and shows a case where the core device N is reduced. The rotating head 1 of the expansion / contraction mechanism 100 when the core device is contracted (during demolding).
When 21 is rotated in a predetermined direction, the orthogonal joint 140 is urged to the left in the drawing, and the link fitting 53a fixed to the lower separating portion 53 is first pulled inward, so that the link fitting 53
The link 60 whose lower end is pivotally attached to a starts rotating inward at the same time with the connecting hole in the upper part as the center of rotation, and the lower separating portion 5
3 is displaced diagonally upward inside the core. When the contraction operation further proceeds, the line of action of the expansion / contraction mechanism 100 changes obliquely upward (in the direction of the connecting hole of the link mounting bracket 52a), and the tensile force acts on the link 60. The link attachment fitting 52a starts to be pulled, the upper separation part 52 follows the lower separation part 53, and the core device is reduced to a V shape. Therefore, when the hollow body block BL is slightly raised and pulled out at the time of demolding, the core device moves in the direction in which the resistance naturally decreases while remaining on the mold K, which facilitates demolding. . In addition, 50 A in the figure is a contour line of the core device before reduction.

Further, when the rotary head 121 of the expansion / contraction mechanism 100 is reversely rotated at the time of driving, the orthogonal joint 140 is urged to the right in the figure, and the upper separating portion 52 follows a trajectory opposite to that at the time of reduction. The width of the lower separation part 53 starts to widen first, and the lower separation part 53 follows the upper separation part 52 and expands to the outside of the core while following the trajectory restricted by the radius of rotation of the link 60. 52,5
3 avoids sliding and abuts (seals), and the chain double-dashed line 50A
Return to the normal cross-sectional dimensions shown in.

FIG. 6 is a perspective view of an embodiment according to a third aspect of the present invention, showing an expansion / contraction mechanism 100 for converting the rotational movement of the screw rod 120 into an extension / contraction movement via a link 130. The expansion / contraction mechanism 100 includes a rotating head 121 at the end of a screw rod 120 in which a plurality of sets of left screw portions 120L and right screw portions 120R are threaded in series.
The left nut member LN is screwed into the left screw portion 120L of the threaded rod 120, the right nut member RN is screwed into the right screw portion 120R, and the left nut member LN and the right nut member R are screwed together.
One end of a link 130 is pivotally attached to each vertical shaft of N, and the other ends of the links 130 are gathered together, pivotally attached to a vertical shaft 140a of an orthogonal joint 140 having a vertical shaft 140a and a horizontal shaft hole 140b, and a screw rod. 120 is supported by a bearing portion 105 provided at a main part of the frame 101, and the screw rod 120 and the link 13 are supported during expansion and contraction.
The 0, the orthogonal joint 140, and the like are configured to be vertically swingable as indicated by the arrow Y.

Next, the operation of the above configuration will be described. If the rotating head 121 is rotated to the right when the core device N is widened, the left nut member LN and the right screw part 1 screwed into the left screw part 120L.
The right nut members RN screwed into 20R approach each other, and the linked link 130 urges the orthogonal joint 140 in the direction opposite to the threaded rod 120 (core widening side), but the threaded rod 120 is supported by the bearing portion 105. Since the mechanism is capable of swinging around the screw rod, the line of action of the extension force is such that the upper and lower separation parts 52, 5 of the core outer skin
3 is urged on the line that follows the optimum trajectory, and the core device expands. Further, when the turning head 121 is rotated counterclockwise when the core device N is contracted, the left nut member LN screwed into the left screw portion 120L and the right nut member RN screwed into the right screw portion 120R are in the arrow directions. The link 130 which is separated from and connected to each other urges the orthogonal joint 140 in the direction of the screw rod 120 (arrow direction),
The pulling force is urged on the line along which the upper and lower separating portions 52 and 53 of the core outer skin follow the optimum trajectory, and the core device shrinks. Therefore, the expansion / contraction mechanism 100 is provided with the non-deformable portion 55 of the core device N and the arm 80.
The core device can be easily expanded / contracted by interposing between the tip connection holes 82 or between the link mounting brackets 53a, and the expansion / contraction mechanism is operated by an air tool (hand-held tool) such as an impact wrench.
It can be completed in a short time of 10 to 20 seconds (according to in-house measurement) with an electric tool or an automatic machine of a production line.

FIG. 7 is a perspective view of a fluid pressure embodiment according to a fourth aspect of the present invention, in which a fluid pressure expansion / contraction mechanism 200 is a double-acting type that expands and contracts by fluid pressure pivotally attached to a frame 201. A fluid actuator 205, a fluid pipe connecting means 230 provided at the rear of the core device, and a forward pipe 210 and a backward pipe 220 that connect the two together. The fluid pipe connecting means 230 includes a forward valve 240 and a backward valve 250. The connecting pipe 260 is configured to project from the rear of the core device so as to be able to pass through the rear end plate 21, and the frame 201 is fixed to the inner side of the non-deformable portion 55 of the core, and the rod end 206 of the fluid actuator 205 is The core 80 is connected to the tip connecting hole 82 of the arm 80 of the slave device or the link mounting bracket 53a to expand and contract the core. The pressure accumulator 270 indicated by the chain line
May be connected to the forward pipe 210.

Fluid pipe connecting means 2 shown enlarged in the lower part of the figure
30 comprises a forward valve 240 for advancing the fluid actuator 205 by pressurizing the fluid, and a retreat valve 250 for retreating the fluid actuator 205.
The forward valve outer cylinder 240a and the retreat valve outer cylinder 250a, which are provided with 10, 220 connecting portions and threaded portions 245b at their ends, are provided with a top-shaped valve body 235 having an operating rod 235a protruding outward, and a spring sp. The valve seat 240 at the rear of the connecting pipe 260
The valve seat 240c is inserted into the forward valve outer cylinder 240a and the backward valve outer cylinder 250a at the threaded portions 245b.
The connecting pipe 260 that also serves as a screw is screwed in, and the packing 265 is attached to the taper portion of the inner surface of the connecting pipe 260.

FIG. 8 is a diagram for explaining the operation of the embodiment based on the fluid pressure according to claim 4, wherein the forward valve 240 and the backward valve 250 of the fluid pipe connecting means 230 are either one of the core expansion and contraction. At the time of pressure supply from the valve, the other operates as a discharge valve. FIG. 8 (a) is a view showing the core widening process. When the formwork stops at the pouring stop position on the production line, the control circuit provided on the production line causes the advancing member provided at the corresponding position. When the pressurizing pipe 281 and the exhaust pipe 282 of the pressure supply device 280 move forward and the pressurizing pipe 281 is coupled to the connecting pipe 260 of the advancing valve 240 of the fluid pipe connecting means 230, the advancing valve 240 is activated by the fluid pressurization indicated by the arrow d. Of the fluid actuator 205 is pressurized in the forward direction, the valve body 235 of the discharge valve 250 is pushed by the tip of the discharge pipe 282 of the pressurizing and supplying device 280, and the fluid actuator 2
The back pressure applied to the piston of 05 (pressurized fluid due to the previous retreat) is discharged from the discharge port 283 of the discharge pipe 282, and the rod end 206 of the fluid actuator 205 advances in the arrow D direction. The accumulator 270 is connected to the forward pipe 2
If it is provided on the 10th side, the backward displacement of the fluid actuator 205 can be prevented even if there is a slight leak in the forward valve or the like during curing of the concrete product.

FIG. 8 (b) is a view showing a state in which the core is reduced. When the mold is stopped at the demolding stop position on the production line, it is provided at the corresponding position by the control circuit provided on the production line. The backward pressure supply device 290 moves forward, and the pressure pipe 291 of the backward pressure supply device 290 moves the backward valve 2 of the fluid pipe connecting means 230.
The valve element 235 is connected to the connecting pipe 260 of the valve 50 and is pressurized by the fluid indicated by the arrow e to retract the valve element 235 and pressurize the piston of the fluid actuator 205 in the opposite direction, thereby advancing the valve element 23 of the forward valve 240.
5 is pushed by the tip of the discharge pipe 292 of the backward pressure supply device 290, and the back pressure (pressurized fluid for the previous advance) applied to the piston of the fluid actuator 205 is discharged to the discharge pipe 29.
2 is discharged from the discharge port 293 of the fluid actuator 2
The rod end 206 of 05 moves backward in the direction of arrow E.

FIG. 9 is an explanatory view of an electric embodiment according to claim 4, wherein the expansion / contraction mechanism 300 is a direct current low-voltage motor 305 (for example, D
(For example, C12V) is decelerated, and the distal end connecting portion 307 is screwed into the threaded portion of the decelerated output shaft 306 so as to be able to move back and forth (extend and contract).
Electric cylinder 33 including a spindle 308 and the like provided with
0 and the power receiving means 340 provided at the rear end of the core device N are connected to each other, and the power receiving electrode portions 341 and 342 of the power receiving means 340 are protruded so as to be able to pass through the rear end plate 21.

Next, the operation will be described. When the formwork stops at the pouring stop position on the production line, the forward power supply device 380 provided at the corresponding position has the polar power feeding electrode section 3
81 and 382 move forward, and the power receiving electrode unit 3 of the power receiving unit 340.
41, 342 are inserted and connected, the electric cylinder 33
The leading end connecting portion 308 advances and the core widens. Further, when the mold is stopped at the demolding stop position on the production line, the reverse-direction power supply electrode parts 392 and 391 of the backward power supply device 390 provided at the corresponding position move forward and the power receiving means 340.
Connected to the power receiving electrode portions 341 and 342 of the electric cylinder 3
The 30-tip connecting portion 308 retracts in the arrow E direction to shrink the core.

FIG. 10 is a front view of the widening limiting means according to claim 5, showing the widening limiting means 400 applied to the core device N. The expansion / contraction mechanism 100, the arm 80, the link 60, etc. are not clearly shown, and therefore the chain line is shown. It shows with. The widening limiting means 400 limits the widening when the core is widened and slides when the core is reduced (arrow F
Direction) a restricting member 430 including a contractable elongated hole portion 401, a member 430a provided with a length adjusting portion 410 in the vicinity of the elongated hole portion, and a member 430b engaging with the elongated hole portion 401 is not deformed. The fixing member 440 is provided between the portion 55 and the link attachment metal fitting 52a of the upper separation portion so as to be rotatable and contractible, and as shown in detail in the lower part of the drawing, the fixing member 440 whose tip is formed into a substantially right angle chevron 440a is attached to the upper separation portion. 52 Inner link mounting bracket 52
A plurality of sets are provided on the front surface or the rear surface side at the same position as a, a notch 455 having substantially the same length as the arm 80 inside the lower separating portion, and a substantially quadratic cutout portion 455 on the outer end of the tip that conforms to the shape of the tip of the fixing member. Plural sets of the engaging members 450 protruding from the front surface or the rear surface side of the arm 80 are protruded so that the chevron 440a of the fixing member 440 and the notch 455 of the engaging member 450 come into close contact with each other when the core is widened. I am configuring.

Further, the tip of the link mounting member 52a inside the upper separating portion 52 is formed in a substantially right angled mountain shape 440a to serve also as the fixing member 440, and the tip of the fixing member is formed outside the tip of the arm 80. Notch 4 opened at a right angle to match
It is also possible to project 55 and serve also as the meshing member 450, and the same effect as described above can be obtained.

FIG. 11 is an explanatory view of the operation of the widening limiting means according to the fifth aspect, and FIG. 11A is a view showing the end of the widening of the core device, in which the fixing member 440 and the meshing member 450 are in close contact with each other. The upper and lower separating parts 52 and 53 are also in close contact with each other. When the contraction operation of the core device is started in this state, the arm 80 is urged to the left on the trajectory limited by the radius R of rotation of the link 60 (see the previous figure), and the upper separating portion 52 moves. The slope of the lower separating portion 53, which was in close contact with the slope, moves to the inside of the core without sliding, and the notch 455 of the meshing member 450 and the fixing member 4 are provided.
In the chevron 440a portion of 40, the lower side surface of the notch 455 and the lower side surface of the chevron 440a of the fixing member 440 start to separate from each other, and then the lower separating portion 53 moves upward while advancing inside the core, When the expansion / contraction operation further progresses, the upper separation part 52 follows the lower separation part 53 and contracts inward, but the elongated hole portion 401 of the restricting member 430 provided so as to be contracted slides in the arrow F direction. When it moves and contracts to a predetermined position, the upper separating portion 52
The side stops the contracting displacement, the side of the lower separating portion 53 further contracts upward inward, and the core device contracts to a shape as shown in FIG. 11B.

Therefore, when the core is widened, the width is widened by the reverse operation from FIG. 11 (b) to FIG. 11 (a). That is, when the arm 80 is biased in the outward direction, the upper separating portion 52 side, which has been contracted following the lower separating portion 53 side, begins to widen first and expands to the extension allowable length of the limiting member 430. , Lower separation part 53
Under the restriction of the radius of gyration of the link 60, the notch 455 opened substantially at a right angle of the engaging member 450 is guided to the chevron 440a of the fixing member 440 before the end of the widening. The upper side surface of the cutout portion abuts the upper side surface of the chevron 440a of the fixing member 440, and at the end of widening the cutout portion 4
55 and the upper surface of the chevron 440a slide to form the cutout 455.
And the mountain-shaped 440a portion are in close contact with each other over the entire surface, and the slopes of the upper separating portion 52 and the lower separating portion 53 are brought into contact with each other without sliding to complete the widening.

FIG. 12 is an explanatory view of the supporting means according to the sixth aspect of the present invention, and shows the supporting means 500 with a part of the core device N having an internal mechanism omitted to be cut away. The front end plate 20 is opened, the rear end plate 21 rotatably supported by the underframe 10 is pushed back by the interlocking rod 22 connected to the front end plate 20, and the positioning pins are provided at the front and rear ends of the core device N. The p has been disengaged from the positioning holes ph of the gable plates 20 and 21. The supporting means 500 is provided by horizontally projecting a supporting beam 510 from the inside of the rear end plate 21, and the supporting beam 510 is provided with the core device N shown in FIG. 2 or 4.
In the supporting frame 90, a gap G is provided in the upper / backward / leftward / rightward directions so as to be loosely inserted, and the supporting beam 510 is attached to the tip end portion 511 of the supporting beam 510 as shown in the partial perspective view in FIG. A back-and-forth movement restricting piece 520 for preventing the slip-out of the sheet is fixedly constructed. The support beam 510 may be configured so that the support beam 510b extending from the underframe 10 can pass through the rear end plate 21 as shown by the chain line. Of course, it is applicable even if it is attached to a butterfly.

Next, the operation of the supporting means 500 will be described with reference to FIG.
The front and rear gable plates 2 of the formwork, for example, when demolding with reduced size
0.21 and the side plate 30 are opened, and the core device N is contracted asymmetrically as shown in FIGS. 3 and 5, but the product is slightly lifted by the vacuum pad of the demolding machine. And pulling the demolding machine forward, the support frame 90 and the support beam 5
Since there is a gap G in the upper / backward / leftward / rightward direction and a back-and-forth movement restricting piece 520 between 10, the core device N naturally moves in the direction with less frictional resistance while being supported by the support beam 510, It is possible to reduce or prevent damage such as abrasion and deformation of the core outer skin, and easily remove the core device N in a short time while leaving the core device N on the mold.

Further, the core device N, which was moved when the core was widened and the mold was closed at the time of driving, was fitted with the sharp positioning pin p guided to the positioning holes ph of the front and rear end plates. As a result, it returns to the proper position and is held in a short time.
Therefore, it is not necessary to remove the core device N one by one at the time of demolding / placing, and the time and labor can be saved.

[0041]

When the core device according to the first aspect is applied to the mold for producing the hollow body block, the core reduction in the demolding process is 10 times.
Can be done within 20 seconds, and no core extraction process is required.
The entire demolding process is completed within about 2 minutes, and the production is dramatically improved. Also, since the upper and lower separating parts are separated without sliding, the packing provided in the separating part is not worn. In addition to being able to prevent it, it is possible to reduce the intrusion of fine concrete powder, dust, etc., that has fallen off during demolding, into the core device, which has the effect of increasing the durability of the core device.

Further, the core mounting step is not required even in the mold assembling step at the time of placing, and the simple turning operation 10 to 20 is performed.
In 2 seconds, the core width and core height will return to the normal dimensions, so the mold assembly will be completed within 2 minutes, and the upper and lower separating parts will abut without sliding, so the separating part It is possible to prevent wear of the packing provided on the side, shorten manufacturing time, and save labor.

If the core device according to claim 2 is applied to a mold for producing a hollow body block, in addition to the effect of claim 1, the mechanical portion can be downsized, so that a small diameter round mold which is difficult to internally install The core device of the cross section can be smoothly expanded and contracted.

According to the core device of the third aspect, the core can be easily widened in a short time of 10 to 20 seconds only by rotating the core expansion / contraction mechanism, and the air / power tool or the production line can be automatically operated. The machine has the effect of saving labor.

According to the core device of the fourth aspect, it is connected to a pressure supply device or a power supply device provided at a predetermined position of a production line that moves intermittently (in our company, moves about every 2.5 minutes). The core expansion / contraction process can be performed in a short time of about 10 to 20 seconds by supplying / discharging the fluid pressure or changing the polarity of the fluid pressure, and there is an effect that the automatic machine of the production line can further save the labor.

According to the core device of the fifth aspect, when the core is widened, the core is prevented from being excessively widened, and the upper separation part and the lower separation part are brought into contact with each other without sliding more accurately. It is possible to avoid wear of the packing and excessive pressing, maintain the reproducibility of the separation part sealing for a long time, and improve the durability of the core device.

According to the core device of the sixth aspect, when the mold is removed, the core device is contracted while being supported on the mold and moved in the direction with the least resistance. Therefore, the core device is worn and damaged. There is an effect that the durability is reduced and the durability is improved, and that it is not necessary to remove the core device one by one at the time of demolding and placing, labor saving and time reduction can be achieved, and production is dramatically improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of the present invention and a mounting state on a mold.

FIG. 2 is a front view of the embodiment according to claim 1.

FIG. 3 is an operation explanatory diagram of the embodiment according to claim 1;

FIG. 4 is a front view of an embodiment according to claim 2.

FIG. 5 is an operation explanatory view of the embodiment according to claim 2;

FIG. 6 is a perspective view of an embodiment according to claim 3;

FIG. 7 is a perspective view of an embodiment by fluid pressure according to claim 4;

FIG. 8 is an operation explanatory view of the embodiment by fluid pressure according to claim 4;

FIG. 9 is an explanatory view of an electric embodiment according to claim 4.

FIG. 10 is a front view of the widening limiting means according to claim 5;

FIG. 11 is an operation explanatory view of the widening limiting means according to claim 5;

FIG. 12 is an explanatory view of a supporting means according to claim 6;

FIG. 13 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 A-Placing direction B-Demolding direction G-Gap K-Form frame N-Core device 10-Form frame underframe 20,21-Front / rear gable plate 50-Core skin 52-Upper separating part 53-Bottom Side separation part 55-non-deformable part 60-link 80-arm 90-support frame 100-expansion / contraction mechanism 120-screw 200-expansion / contraction mechanism (by fluid pressure) 205-fluid actuator 230-fluid piping connection means 300-expansion / contraction mechanism (electric) 330-electric cylinder 340-power receiving means 400-width expansion limiting means 440-fixing member 450-engaging member 500-supporting means 510-supporting beam

Claims (6)

[Claims] 1. An upper shell and a lower shell that can be sealed when they come into contact with one side of a core shell of an arbitrary shape in the longitudinal direction of the shell are provided, and a tip connecting hole and an intermediate connecting hole are provided inside the lower separating section. The provided arm is fixed, one end of the link is rotatably pivotally attached to the link attachment fitting inside the upper separation part, the other end hole part of the link is connected to the intermediate connection hole of the arm, and the tip end of the arm. The connecting hole and the non-deformed portion of the core outer shell were connected via a scaling mechanism.
A core device for a mold for producing a hollow body block, which is characterized in that: 2. A core outer shell of an arbitrary shape is provided with an upper separation portion and a lower separation portion that can be sealed when abutting on one side surface in a longitudinal direction, and a link mounting metal fitting inside the upper separation portion and a lower separation portion inside. A mold for manufacturing a hollow body block, wherein link mounting metal fittings are rotatably connected by a link, and a lower end connecting portion of the link and a non-deformable portion of a core outer shell are connected via an expansion / contraction mechanism. Core device. 3. The mold for producing a hollow body block according to claim 1, wherein the expansion / contraction mechanism is a link mechanism for converting the rotational movement of the screw rod into an expansion / contraction movement. Child device. 4. The expansion / contraction mechanism is a fluid actuator connected to a fluid pipe connecting means provided at the rear end of the core device, or an electric cylinder connected to a power receiving means provided at the rear end of the core device. The core device for a mold for producing a hollow body block according to claim 1 or 2. 5. The expansion limiting means is provided between the non-deformable portion of the core and the upper separating portion and between the upper separating portion and the lower separating portion, according to any one of claims 1 to 4. Core device for the mold for manufacturing the hollow body block of. 6. The mold for producing a hollow body block according to any one of claims 1 to 5, wherein the core device is supported from the rear by a supporting means so as to be movable in the upward, forward, backward and leftward and rightward directions. Core device.