JPH0811403B2 - Mold opener for concrete product molding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold opening / closing device for molding concrete products, and more particularly to a device for opening / closing molds such as a mold plate of a medium mold body, a side plate of an outer mold body and a gable plate.

[0002]

2. Description of the Related Art Conventionally, as a mold opening / closing device for molding concrete products of this type, for example, a middle mold opening / closing device, has a front-rear, left-right, middle-sized body, and each of the front-rear, left-right, middle-shaped bodies is molded into a substantially rectangular shape. Then, the ends of each of these middle-sized bodies are tightened and fixed with a plurality of bolts and nuts through packing, and when the mold is released after the product is molded, the ends of each of the middle-sized bodies are secured to each other. A configuration is known in which a plurality of connected bolts and nuts are removed and released.

Further, when the end plate and the side plate of the outer mold body are assembled, the end plate and the side plate are manually moved to a position where a clamp is applied, and then the mold is clamped and fixed by the clamp, and when the mold is released after molding the product, the clamp is performed. There is also known a means for removing the mold and using the bar as a lever and releasing it from the concrete product.

[0004]

In the structure for opening and closing the middle mold, the middle mold is clamped at the time of molding the product and the middle mold is released after molding the product. Since it is necessary to remove the bolts and nuts of the above, it takes a lot of work to clamp and release these molds, and packing is interposed between the ends of each medium-sized body, so these molds can be easily clamped. Also, in the configuration of the end plate and the side plate of the outer mold body, since a large force is required for mold release from the concrete product at the time of mold release after product molding, it is necessary to use mold releasing means such as a pantograph, Therefore, there is a problem that overall operability is poor and it is not preferable in improving workability.

The present invention has been made in view of the above points, and it is possible to easily and easily perform a mold assembling operation of a mold body during product molding and a mold release operation of the mold body after product molding. It does not require a lot of trouble for these operations and does not need to use a mold releasing means such as a bar or pantograph separately, and therefore, it is a mold for concrete product molding that has excellent operability as a whole and can improve workability. It is intended to provide an opening / closing device.

[0006]

A mold opening / closing device for concrete product molding according to the present invention forms a concrete product with a fixed bottom plate, a first cam guide and a second cam guide arranged on the fixed bottom plate. And a first cam surface which is rotatably supported by the mold body and engages with the first cam guide, and the first cam surface. And a cam that has a second cam surface that engages with the second cam guide and that opens and closes the mold body.

[0007]

In the mold opening / closing device for molding concrete products of the present invention, when the cam supported by the mold is rotated when releasing the mold after the product is molded, this cam has its first cam surface. Engages with a first cam guide arranged on the fixed bottom plate and is rotated, and with this rotation of the cam, the mold body is moved by the first cam guide via the first cam surface. The mold is pushed in the mold opening direction, and the mold is gradually opened and moved in the mold opening direction to be released from the molding surface of the concrete product. Therefore, by rotating the cam, the mold can be easily released from the molding surface of the concrete product.

[0008] Next, when the cam pivotally supported by the mold body is rotated at the time of mold matching at the time of molding a product, the second cam surface of this cam is the second cam whose fixed bottom plate is arranged. The mold is engaged with the guide and is rotated, and the mold is interlocked with the second cam guide in the mold closing direction via the second cam surface as the cam rotates. It is set to a mold assembly position where it is gradually closed and moved in the closing direction to form a concrete product. Therefore, by rotating the cam, the mold can be easily fitted to the form for molding the molding surface of the concrete product.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The structure of an embodiment of the present invention will be described below with reference to the drawings.

First, an embodiment of the medium-sized switchgear will be described. In FIGS. 1 to 4, 1 is a fixed frame,
A fixed bottom plate 2 formed in a substantially horizontally long rectangular shape is integrally fixed to the upper surface of the fixed frame 1 in a horizontal shape, and guides a side plate and a lateral plate to the lower surface of the fixed frame 1 in the front, rear, left and right directions. The guide rails 3 are arranged and fixed in the front-rear direction and the left-right direction, respectively.

Further, the front and rear left and right mid-sized bodies which are positioned on the fixed bottom plate 2 and are fitted in a substantially rectangular shape, that is, the front side mid-sized body 4 and the front-side middle shaped bodies 4 are arranged at both ends in the left-right direction. A middle mold 8 including a left and right middle mold bodies 5, 6 as a mold body and a rear middle mold body 7 arranged between the left and right middle mold bodies 5, 6 is arranged.

The front middle mold body 4 has a vertical mold plate 9, and a plurality of reinforcing frame bodies 10 are arranged in a multi-stage manner inside the mold plate 9 at predetermined intervals in the vertical direction. An inner inclined portion 11 and an outer inclined portion 12 are formed at both ends of each of the reinforcing frames 10 in the left-right direction. Then, connecting fittings 13 having an L-shaped cross section that is long in the vertical direction are integrally fixed to the inner inclined portions 11 at both ends of each of the reinforcing frames 10, and the connecting fittings 13 at the both ends have a predetermined vertical direction. A plurality of shaft supporting plates 14 are horizontally fixed to each other at intervals. Further, the outer inclined portions 12 at both ends of each of the reinforcing frames 10 and the connecting metal fittings 13 on the same plane as the outer inclined portions 12 at the both ends are inclined portions formed at both ends of the template 9. 15 are fixed to each one.

The left and right middle mold bodies 5, 6 each have a vertical mold plate 16, and a plurality of reinforcing frame members 17 are provided inside the mold plate 16 at predetermined intervals in the vertical direction. Are arranged and fixed in a multi-stage manner, and an inner inclined portion 18 and an outer inclined portion 19 are formed at one end of each reinforcing frame body 17, and the inner inclined portion 18 of each reinforcing frame body 17 is formed. A vertically long connecting plate 18a is integrally fixed to the connecting plate 18a, and a plurality of shaft supporting plates 20 are horizontally integrally fixed to the connecting plate 18a at predetermined intervals in the vertical direction.

At the other end of each reinforcing frame 17, an inwardly inclined frame portion 21 and a parallel frame portion 22 parallel to the front middle mold body 4 are formed. Then, an inclined portion 23 formed by bending at one end portion of the template 16 is integrally fixed to the outer inclined portion 19 at one end portion of each of the reinforcing frame bodies 17, and An inclined portion 24 and a parallel portion 25, which are bent and formed at the other end of the template 16, are integrally fixed to the outer edge portions of the inclined frame portion 21 and the parallel frame portion 22 at the other end portion, respectively. In addition, in the left and right middle-sized bodies 5 and 6,
A connecting metal fitting 26 having an L-shaped cross section, which is long in the up-down direction, is integrally fixed to the outer end of the parallel frame portion 22 at the other end of the one-sided middle-sized body, that is, the right-side middle-sized body 5, and the connecting metal fitting 26 is vertically movable. A plurality of shaft support plates 27 are horizontally fixed to each other at predetermined intervals in the direction. Further, an engaging portion 28 is provided on the outer end of the parallel frame portion 22 at the other end of the other middle-sized body, that is, the left-side middle-molded body 6.
Are formed respectively.

Further, upper and lower shaft support plates 14 projecting from both ends in the left-right direction of the front middle mold body 4 and upper and lower parts projecting from one end of the left and right middle mold bodies 5 and 6, respectively. The shaft supporting plate 20 and the shaft supporting plate 20 are overlapped in a vertical position, and the upper and lower shaft supporting plates 14 and 20 are rotatably supported by a rotation center shaft 29 extending therethrough in the vertical direction. The left and right middle mold bodies 5, 6 are opened and closed with respect to the front middle mold body 4 about the rotation center shafts 29 at the left and right ends of the front middle mold body 4, respectively.

Further, the rear middle mold body 7 has a vertical mold plate 30, and a plurality of reinforcing frame bodies 31 are formed in a multi-stage manner inside the mold plate 30 at predetermined intervals in the vertical direction. The reinforcing plates 31 are fixedly attached to each other, and vertically long connecting plates 32 are integrally fixed to both left and right ends of each reinforcing frame 31, and the connecting plates 32 at both ends are provided with a predetermined interval in the vertical direction. Here, the plurality of shaft support plates 33 are horizontally fixed integrally.

Further, upper and lower shaft support plates 27 projecting from the other end of the right middle mold body 5 and upper and lower shaft support plates 33 projecting from one end of the rear middle mold body 7. And the upper and lower shaft support plates 27 and 33 are rotatably supported by a vertically rotatable central shaft 34 extending therethrough. Then, the rotation center shaft 34 of the right middle-sized body 5
The rear side middle mold body 7 is opened and closed with respect to the right side middle mold body 5 around the center. Further, a plurality of engaging members which are releasably engaged with the other engaging portions 28 of the upper and lower portions of the left-side middle mold body 6 are vertically spaced apart from each other at the other end of the rear middle-mold body 7. The united 36 is attached respectively.

When the front middle mold body 4, the left and right middle mold bodies 5, 6 and the rear middle mold body 7 are combined with each other, the middle frame 8 having a horizontally long rectangular shape is constituted by them.
Template plate 9 of the front middle mold body 4 and template plates 16 of the left and right middle mold bodies 5 and 6
Also, a series of molding plate bodies 37 is configured by the template 30 of the rear middle mold body 7.

Next, a series of molded plate members 37 are formed in the middle frame 8.
In the state in which the above-mentioned structure is configured, the mold abutment 38 is located on the fixed bottom plate 2 in the vicinity of the outside of the front middle mold 4, the left and right middle molds 5, 6 and the rear middle mold 7, and is separated from the front middle mold 4. , And is fixed along the left and right middle mold bodies 5, 6 and the rear middle mold body 7.

Further, a plate-shaped first cam guide 39 is vertically and integrally fixed to the die support 38 on the side of the left and right middle dies 5, 6. In addition, at the upper end of the mold abutment 38, the front middle mold 4, the left and right middle molds 5, 6 and the rear middle mold 7 are formed.
A mold body 43 for molding the open end portion of the product is fixed along. In addition, between the mold body 43 and each of the mold plates 9, 16 and 30 bonded to the mold body 43, and between the mold body 43 and a movable outer mold described below bonded to the mold body 43, respectively. packing
43a is provided.

Further, roller support shafts 44 in the up-down direction are respectively projected upward on the fixed bottom plate 2 at spaced positions in the vicinity of the inner sides on the other end side of the left and right middle mold bodies 5, 6.
A second cam guide 45, which is a guide roller, is rotatably mounted on the protruding ends of the left and right roller support shafts 44.

Next, in the left and right middle-sized bodies 5 and 6,
Positioned on the other end side from the middle portion in the front-rear direction, the operating rods 46 that are long in the vertical direction are vertically disposed in the reinforcing frame bodies 17 in the upper and lower portions, respectively, and are rotatably inserted. Plural sets of a pair of flanges 47 for sandwiching the reinforcing frame 17 at a predetermined position from above and below are integrally formed at intermediate positions in the vertical direction of the left and right operation rods 46, and the flanges 47 of each set are formed by the flanges 47 of each set. The left and right operating rods 46 are rotatably supported by the reinforcing frame bodies 17, respectively.

Further, the lower ends of the left and right operating rods 46 are respectively projected to positions close to the fixed substrate 2, and the protruding lower ends of the left and right operating rods 46 are arranged in a substantially disk shape horizontally. Cam bases 48 are integrally fixed at their eccentric positions. Further, disc-shaped cams 49 are integrally fixed to the lower ends of the left and right operation rods 46 which are overlapped with the lower portions of the left and right cam bases 48, respectively.

The left and right cams 49 have respective operation rods 46.
Has a base end portion 50 fixed to the protruding lower end portion and a curved portion 51 curved from the base end portion 50 around the outer peripheral edge of each cam base 48 around the protruding lower end portion of the operating rod 46. The first cam surface 52 is formed at the outer edge of the curved portion 51 and has the same shape as the outer circumference of the cam base 48, and the inner edge of the curved portion 51 has the above-mentioned shape. Second cam surfaces 53 each having a shape substantially along the first cam surface 52 are formed in an arc shape, and an inner end portion of the second cam surface 53, that is, an inner end portion toward the base end portion 50 is formed. Engagement recess 54
Are formed. The first cam surface 52 contacts the first cam guide 39 and is slidably contacted with the first cam guide 39, and the second cam surface 53 contacts the second cam guide 45. It comes into contact with and is rotated in sliding contact.

Further, it is located on the upper surface of the reinforcing frame 17 provided at the upper ends of the left and right middle-sized bodies 5 and 6 and is horizontally provided near the upper ends of the left and right operating rods 46. A connecting piece 55
Are integrally fixed to each other, and an insertion hole 56 is formed at the tip of each connecting piece 55. Further, the left and right reinforcing frame bodies 17 have locking holes 57 communicating with the insertion holes 56 of the connecting pieces 55.
Is formed, and the stopper pins 58 are inserted into and removed from the left and right locking holes 57 and the insertion holes 56 communicating with the locking holes 57, respectively. 58 is a chain on each of the connecting pieces 55
It is connected via 59.

Then, by inserting the stopper pin 58 into the left and right insertion holes 56 and the locking hole 57, the respective operating rods are inserted.
The rotation of each cam 49 is locked via 46. Further, an operating portion 60 for rotating the operating rod 46 is integrally provided on the upper end of the left and right operating rods 46 so as to project.

Further, the front middle mold 4 is fixed to the mold support 38 by bolts (not shown). Further, casters 61 as guide rollers are located on both sides of the reinforcing support frames 10, 17, 31 arranged at the lower ends of the left and right middle mold bodies 5, 6 and the rear middle mold body 7. Each caster 61 is rotatably and vertically positionally adjustable, and each caster 61 is installed on the fixed substrate 2. And
The casters 61 support the left and right middle mold bodies 5, 6 and the rear middle mold body 7, and the respective casters 61 open and close the left and right middle mold bodies 5, 6 and the rear middle mold body 7, respectively. It is supposed to be moved.

Next, the operation of the above embodiment will be described.

A rectangular middle mold 8 is constructed by sequentially assembling the front middle mold 4, the left and right middle molds 5, 6 and the rear middle mold 7, and the respective mold plates 9, 16, 30 are formed. As a result, a series of molded plate bodies 37 is formed. Further, the movable outer dies 62 on the front, back, left and right are guided by the guide rails 3 on the front, rear, left and right by a moving means (not shown) to face the front middle dies 4, the left and right middle dies 5, 6 and the rear middle dies 7 simultaneously or sequentially. When the movable outer dies 62 are moved forward and backward, the movable outer dies 62 on the front, rear, left and right are stopped at the stop positions for the front middle mold 4, the left and right middle molds 5, 6 and the rear middle mold 7. A cavity 63 is formed on the mold body 43 between the front middle mold body 4, the left and right middle mold bodies 5, 6, and the rear middle mold body 7. Then, concrete is cast in the cavity 63 and the concrete product is cured.

Next, the medium mold 8 after molding the concrete product
At the time of releasing the mold, the tightening of each engaging portion 28 at the other end of the rear middle mold body 7 and each engaging body 36 at the other end of the other middle mold body 6 is released, and the rear middle mold body 7 is released. The front side middle mold body 4 around the rotation center shaft 34 that pivotally supports the one side middle mold body 5 on the other end.
When the mold is opened and rotated toward the mold opening direction, the mold plate 30 of the rear middle mold body 7 is separated from the inner molding surface of the concrete product, and the rear middle mold body 7 is molded inside the concrete product. Easily released from the surface. On this occasion,
The rear-side medium-sized body 7 is supported by each caster 61 and fixed to the fixed substrate 2
Since it is opened and rotated along the upper side, the rear middle mold body 7 is easily released from the inner molding surface of the concrete product.

Further, an operating rod pivotally supported by the one-sided medium-sized body 5
When the operating rod 46 is rotated in one direction by the operating portion 60 of the 46, the cam base 48 and the cam 49 fixed to the protruding lower end portion of the operating rod 46 are rotated, and the outer edge of the curved portion 51 of the cam 49 is rotated. The first cam surface 52 formed on the portion and the outer edge portion of the cam base 48 at a position corresponding to the first cam surface 52 are engaged with the first cam guide 39 arranged and fixed on the fixed base plate 2. And the cam 49 and the cam base 48 rotate, and the first
The one-side middle mold body 5 is pushed in the mold opening direction by the cam guide 39 via the first cam surface 52 and the outer edge portion of the cam base 48.

The one-side middle mold body 5 is gradually opened and rotated in the mold opening direction in which the one-side middle mold body 4 approaches the front middle mold body 4 around a rotation center shaft 29 pivotally supported at one end of the front middle mold body 4. The mold plate 16 of the one-side middle mold body 5 is separated from the inner molding surface of the concrete product, and the one-side middle mold body 5 is easily separated from the inner molding surface of the concrete product.

When the one-sided medium-sized body 5 is rotated by releasing from the concrete product, the rear-sided medium-sized body 7 pivotally supported on the other end of the one-sided medium-sized body 5 via the rotation center shaft 34. The mold release rotation of the one-sided middle-sized body 5 is interlocked with the mold release rotation, and the mold release rotation is further increased. At this time, the one-side middle mold body 5 and the rear-side middle mold body 7 are supported by the respective casters 61 and are opened and rotated along the fixed bottom plate 2. Is lightly released from the inner molding surface of the concrete product.

Further, the operating rod pivotally supported by the other middle-sized body 6
When the operating rod 46 is rotated in one direction by the operating portion 60 of the 46, the cam base 48 and the cam 49 fixed to the protruding lower end portion of the operating rod 46 are rotated, and the outer edge of the curved portion 51 of the cam 49 is rotated. The first cam surface 52 formed on the portion and the outer edge portion of the cam base 48 at a position corresponding to the first cam surface 52 are engaged with the first cam guide 39 arranged and fixed on the fixed base plate 2. And the cam 49 and the cam base 48 rotate, and the first
With the cam guide 39, the other middle mold body 6 is pushed in the mold opening direction via the first cam surface 52 and the outer edge portion of the cam base 48.

The other middle mold body 6 is gradually opened and rotated in the mold opening direction in the direction of approaching the front middle mold body 4 about the rotation center shaft 29 pivotally supported on the other end of the front middle mold body 4. Then, the template 16 of the other middle molding 6 is separated from the inner molding surface of the concrete product, and the other middle molding 6 is easily separated from the inner molding surface of the concrete product. At this time, the other-side middle mold body 6 is supported by the casters 61 and is opened and rotated along the fixed bottom plate 2, so that the other-side middle mold body 6 is easily released from the inner molding surface of the concrete product. .

Therefore, by rotating the cam 49, the rear middle mold body 7 and the left and right middle mold bodies 5, 6 are sequentially opened and rotated in the mold opening direction.
The inner diameter of the middle mold 8 made of 6, 7 is reduced, and the middle mold 8 is easily released from each of the inner molding surfaces of the concrete product.

Next, when the front, rear, left and right middle mold bodies 4, 5, 6, 7 are matched with each other at the time of molding the product, the other middle mold body 6 is formed.
When the operating rod 46 is pivotally operated in the other direction by the operating portion 60 of the operating rod 46 pivotally supported by, the cam base 48 and the cam 49 fixed to the protruding lower end portion of the operating rod 46 are different from those in the case of the release. Is rotated in the opposite direction, and the second cam surface 53 of the cam 49 engages with the second cam guide 45 provided on the fixed bottom plate 2 and is guided and rotated.

Also, as the cam 49 rotates, the second cam guide 45 causes the second cam surface 53 to intervene and the other middle-sized body 6 is formed.
Is interlocked with the mold assembly direction, and the other side middle mold body 6 is gradually closed and rotated in the mold assembly direction about a rotation center shaft 29 pivotally supported on the other end of the front side middle mold body 4. And the second
Engaging recess formed on the second cam surface 53 of the cam guide 45 of
When 54 is engaged, the other side middle mold 6 is pivotally set to a mold clamping position for molding a concrete product.

The operating rod pivotally supported by the one-sided medium-sized body 5
When the operating rod 46 is rotated in the other direction by the operating portion 60 of the 46, the cam base 48 and the cam 49 fixed to the protruding lower end portion of the operating rod 46 are rotated in the opposite direction to the case of the mold release. The second cam surface 53 of the cam 49 engages with the second cam guide 45 provided on the fixed bottom plate 2 and is guided and rotated.

Further, with the rotation of the cam 49, the second cam guide 45 causes the second cam surface 53 to intervene and the one-side middle mold body 5 is inserted.
Is interlocked with the die assembling direction, and the one-side middle die body 5 is gradually closed and rotated in the die assembling direction about a rotation center shaft 29 pivotally supported by one end of the front side middle die body 4. And the second
Engaging recess formed on the second cam surface 53 of the cam guide 45 of
When 54 is engaged, the one-side middle mold 5 is pivotally set to the mold clamping position for molding the concrete product.

When the one-side middle mold body 5 is closed and rotated in the mold assembling direction, the rear-side middle mold body is pivotally supported on the other end of the one-side middle mold body 5 via the rotation center shaft 34. 7 is rotated in association with the mold assembly rotation of the one-side middle mold body 5.

When the rear middle mold body 7 is closed and rotated in the mold assembly direction around the rotation center shaft 34 that pivotally supports the rear middle mold body 5 at the other end of the one middle mold body 5, the rear middle mold body 7 is rotated. By engaging each engaging body 36 at the other end with each engaging portion 28 at the other end of the other middle-sized body 6, the engaging portions 28 and the engaging bodies 36 are tightened and connected to each other. The rear middle mold 7 is set at a predetermined position for molding a concrete product.

Therefore, by rotating the cam 49, the left and right middle mold bodies 5, 6 and the rear middle mold body 7 are sequentially closed and rotated in the mold assembling direction. , 6, 7 are combined to form the middle mold 8, and a series of molding molds 37 for molding the inner molding surfaces of the concrete product by the mold plates 9, 16, 30 on the front, rear, left and right of the middle mold 37. Is configured. When the left and right middle mold bodies 5, 6 and the rear middle mold body 7 are sequentially closed and rotated in the mold assembling direction, the respective middle mold bodies 5, 6, 7 are supported by the respective casters 61. Then, it is lightly closed and rotated along the fixed bottom plate 2.

Next, an embodiment of the outer die opening / closing device will be described. In FIGS. 14 and 15, there is provided a fixed bottom plate 64 on which the middle die 8 of the embodiment is arranged.
In the front and rear portions of 64, front and rear side plates 65 as molds are respectively arranged facing the front middle mold body 4 and the rear middle mold body 7 of the embodiment so as to be movable back and forth along guide rails (not shown). At the same time, the left and right end plates 66 as molds are arranged on the left and right portions of the fixed bottom plate 64 so as to move toward and away from the left and right middle mold bodies 5 and 6 along guide rails (not shown). The outer die 67 is openable and closable by the front and rear side plates 65 and the left and right end plates 66.

A first cam guide 68, which also serves as a pedestal and is formed in a substantially U-shaped cross section, is integrally fixed to the front and rear portions and the left and right portions of the fixed bottom plate 64. Fixed support plates 69 as fixed bottom plates are horizontally and integrally fixed to outer lower portions of the left and right first cam guides 68, respectively, at substantially middle portions in the lengthwise direction. A vertical roller support shaft 70 is vertically projectingly supported by each fixed support plate 69 in a vertically upward direction, and a second cam guide formed of a guide roller is provided at an upper end portion of each of the front, rear, left and right roller support shafts 70. Each 71 is rotatably mounted.

Further, the front and rear side plates 65 and the left and right end plates 66 are each formed in a substantially rectangular shape, and reinforcing edge frames 72 are integrally fixed to the outer peripheral edge portions thereof. A plurality of reinforcing frame bodies 73 are integrally fixed at predetermined intervals in the vertical direction and the horizontal direction of the frame 72. Further, in the front and rear side plates 65 and the left and right end plates 66, lower end edge portions 74 of the respective reinforcing edge frames 72 and lower reinforcing frame pieces 75 of the respective reinforcing frame bodies 73 located above the respective lower end edge portions 74. An operating rod 46 is vertically disposed between and in the middle of each lengthwise direction, and is rotatably supported in the same manner as in the above embodiment.

Further, the lower end edge portions 74 of the respective operating rods 46 are
A cam base 48 and an integral cam 49 are integrally fixed to the lower part of the cam base 48 at the projecting end protruding downward from the cam base 48 as in the above-described embodiment. Each of the cams 49 has a first cam surface 52 that engages with the first cam guide 68 and a second cam surface 53 that engages with the second cam guide 71, as in the previous embodiment. ing. In addition, operating portions 60 are provided at the upper ends of the operating rods 46, respectively, as in the above-described embodiment. In addition, 76 in FIG. 15 is packing.

With this structure, as in the case of the above-described embodiment, the operating portions 46 of the operating rods 46 are used to rotate the operating rods 46 and rotate the cams 49 toward one side. , The front and rear side plates 65 and the left and right end plates 66 are respectively closed and moved toward the mold assembling direction, and the front and rear side plates 65 and the left and right end plates 66 are combined to form an outer die 67, and the outer die The front and rear side plates 65 and the left and right end plates 66 form a series of molding dies for molding the outer molding surfaces of the concrete product.

Further, when the outer die 67 is released from the mold, the operating rods 46 are rotated by the operating portion 60 of the operating rods 46 to rotate the cam 49 toward the other side, as in the above embodiment. As a result, the front and rear side plates 65 and the left and right end plates 66 are opened and moved toward the mold release direction, respectively, and the front and rear side plates 65 and the left and right end plates 66 are moved.
While the mold is released, the front and rear side plates 65 and the left and right end plates 66 are easily released from the outer molding surfaces of the concrete product.

In each of the above-described embodiments, the case where the cam 49 is integrally fixed to the lower portion of the cam base 48 in the overlapping state has been described. However, the present invention is not limited to this, and only the cam 49 is used without using the cam base 48. It may be integrally fixed to the lower end of 46.

[0051]

According to the present invention, the fixed bottom plate is provided with the first cam guide and the second cam guide, and the mold body is arranged to be openable and closable with respect to the mold assembly position for molding the concrete product. Since a cam having a first cam surface that engages with the first cam guide and a second cam surface that engages with the second cam guide is rotatably supported in the By the dynamic operation, it is possible to easily and easily perform the mold assembling operation of the mold during product molding and the mold releasing operation of the mold after product molding.
It does not require a lot of trouble for these operations and does not need to use a mold releasing means such as a bar or pantograph separately, and therefore, it is a mold for concrete product molding that has excellent operability as a whole and can improve workability. A switchgear can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a concrete product molding die opening / closing device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same cam.

FIG. 3 is a plan view of the same medium-sized opening / closing device.

FIG. 4 is a cross-sectional view taken along line AA of the above.

FIG. 5 is a cross-sectional view taken along line B-B of FIG.

FIG. 6 is a plan view of the same cam mechanism section.

FIG. 7 is a front view of the same cam operating mechanism.

FIG. 8 is a plan view showing a cam in a state where the above-mentioned middle-sized body is matched.

FIG. 9 is an operation explanatory diagram of the cam showing the releasing start state of the same.

FIG. 10 is an operation explanatory diagram showing a state in which the first cam surface is in contact with the first cam guide of the same.

FIG. 11 is an operation explanatory view showing a state in which the intermediate mold body is released from the mold.

FIG. 12 is an explanatory view of the operation of the cam showing the mold matching start state.

FIG. 13 is an operation explanatory diagram showing a state in which the second cam surface is brought into contact with the second cam guide and the middle-sized body is closed and rotated.

FIG. 14 is a perspective view of an outer mold opening / closing device showing another embodiment.

FIG. 15 is a side view showing the same cam mechanism section.

[Explanation of symbols]

 2,64 Fixed bottom plate 4 Front middle mold 5,6 Mold 39,68 First cam guide 45,71 Second cam guide 49 Cam 52 First cam surface 53 Second cam surface 65,66 Mold

Claims (1)

[Claims] 1. A fixed bottom plate, a first cam guide and a second cam guide arranged on the fixed bottom plate, and a molding unit which is arranged to be openable and closable with respect to a mold assembly position for molding a concrete product. And a first cam surface that is rotatably supported by the mold body and that engages with the first cam guide, and a second cam surface that engages with the second cam guide. A mold opening and closing device for concrete product molding, comprising: a cam for opening and closing the mold body.