JP5335707B2 - Clamping mechanism for lifting and lowering spacer members in the core of concrete formwork - Google Patents

Description

  The present invention relates to a core of a concrete mold used for forming a pipe block which is a concrete product, and more particularly, a spacer member for reducing the core frame is lifted and lowered by a simple mechanism, and a concrete product is provided. The present invention relates to a clamp mechanism for a spacer member in a core of a concrete mold that can be molded with a thick wall with the same standard and can be easily removed.

  The pipe block that forms a waterway such as a sewer is a concrete product having a through hole in the center, and the core used together with the formwork to form this through hole is an easy to mold product after solidifying the concrete. A structure that can be released from and taken out from the machine is required.

Conventionally, in order to make it easier to pull out the inner frame installed inside the outer frame, the spacer member forming a part of the frame surface is mechanically removed by a link mechanism and fluid pressure to reduce the peripheral wall. Something to be restored is proposed.
Also, there is a type in which a link mechanism driven by a screw rod is provided on a core frame that can be contracted in the side surface direction, and the core frame is elastically deformed by this link mechanism to release the core frame.

  Furthermore, as a mechanism for moving the spacer member up and down using a link mechanism, a shaft is disposed in the longitudinal direction between the core frame and the spacer member, and a sleeve is slidably inserted into the shaft. In some cases, a link mechanism for raising and lowering the spacer member is provided, a clamp mechanism is interposed between the sleeve and the shaft, and the advancement and retreat of the sleeve and the shaft and the link mechanism interlock to raise and lower the spacer member.

  As this clamping mechanism, for example, in Japanese Patent Application Laid-Open No. 2004-1568, the clamping mechanism extends to the sleeve to fix the mounting plate, and is provided with a groove in the longitudinal direction of the mounting plate so that the drive shaft of the rotating plate is A pin that is rotatably attached to the tip of the mounting plate and fixed to one end of the shaft is connected to the swing link rod and is slidably inserted into the groove of the mounting plate. .

  The core has an auxiliary mechanism that expands and contracts the core frame as the spacer member moves up and down. The spacer members are provided with expanding and contracting guide plates that are wider than the spacer members at both ends. Connecting pins are provided on both sides of the guide plate, and the connecting pins are slidably engaged in the long holes of the reinforcing plate in the side wall portion. With such a configuration, a simple configuration and a small driving force are provided. It is possible to advance and retract the shaft rod.

Actual Kaihei 01-142746 JP2004-1568

  In the link mechanism that moves the spacer member up and down, one end of the link rod is pivotally attached to the core frame or spacer member, and the other end is overlapped to pivotally attach to the sleeve or shaft. The longer the distance, the longer the distance between the pivots, and the larger the lift, the easier the product release and removal.

On the other hand, a pipe block installed under a road that receives the weight of an automobile or the like is required to be strong and have a thicker wall.
Furthermore, in a product having a slit hole on one side, the slit frame plate to be molded is suspended from the spacer member, and if the one side becomes thicker, the slit frame plate also hangs down accordingly. Ensuring is a problem.
However, since the outer dimensions are constant, the space of the core frame is reduced. On the other hand, if the raising / lowering width of the link mechanism is not increased, the product cannot be released or taken out.

Under such circumstances, in the operation of the clamp mechanism, if the clamp mechanism is arranged away from the core while avoiding the entry and exit of the components into the core, it will be impossible to raise and lower the end plate. The protrusion width from the core is also limited.
On the other hand, if it is inevitable that a part of the constituent material enters and exits the core, a configuration that can secure a space for entering and exiting the smaller core space is required.

  Therefore, the present invention provides a clamp mechanism for raising and lowering a spacer member in a core of a concrete mold that can secure a sufficient movement width even when the inner space of the core frame is small and narrow, and the thickness of one surface of the product is formed. In addition, the product can be removed from the mold in the horizontal direction as in the past, and the purpose is to improve the efficiency of the die cutting operation.

Lifting clamping mechanism of the spacer member in the core of the concrete form of the present invention comprises a core frame having an opening over the lower surface of the entire length of the peripheral wall forming the frame surface of the cylindrical, with interposed said opening comprising a spacer member for opening and closing the opening portion, the shaft is disposed in the longitudinal direction between the spacer member and the core frame, slidably insert the sleeve to the shaft, the on and the said sleeve shaft linkage to lift the spacer member is provided, the sleeve and the clamping mechanism is interposed between the shaft and reciprocating with the concrete form the link mechanism in conjunction elevating the spacer member of the said sleeve shaft In the core of
The clamping mechanism swing link is configured from the rotary link and the connecting member, that the base swinging axis of the swinging link pivotally attached to the proximal end of the shaft, the rocking end of said rocking link it has pivotally attached the rotation end of the rotary link rotatably, to the base pivot axis of the rotary link and pivotably connected to a distal end portion of the connecting member formed integrally to extend in the sleeve, the pivot the swinging of the link as well as acting outside of the core, proximal is characterized in that close to a position where it does not interfere with the installation side end surface of the core.

Further, the invention of claim 2, in lifting the clamping mechanism of the spacer member in the core of the concrete formwork according to claim 1, formed in a gate shape the connecting member before and after plate and top plate, the base of the sleeve connected by fixing the ends to embrace the with the swing link and device within該門shape for guiding the forward and backward to prevent lateral deflection, the proximally swing shaft of the swing link forming an arcuate end surface abutting against the upper plate, it is characterized in that to suppress the floating due to the pressure upward direction to the oscillation axis.

  According to the present invention, the shaft rod can be advanced and retracted with a simple structure by a clamp mechanism and with a small driving force, and the maintenance is easy and the cost is low.

Since the swing of the swing link acts outside the core and the base end is brought close to the position where it does not interfere with the end surface of the core, the swing link and the rotary link are located inside the core. There is only a possibility that a part of the connecting member that only moves in the lateral direction does not enter or exit the core but enters or exits the core.
Therefore, if the outer width is almost equal to that of the sleeve having the device space in the core, the clamping mechanism can be operated without having to make a special space.

  In addition, by installing the base of the swing link close to the position where it does not interfere with the core installation side end surface even when swinging, the projecting width from the core can be minimized, and the tread plate can be raised or lowered. By setting the rotation link to a length that does not hinder the length of the link mechanism, it is possible to increase the moving width of the clamp and increase the lifting / lowering width of the link mechanism.

  Further, the invention of claim 2 is that the connecting member is formed in a gate shape with the front and rear plates and the top plate, and is fixedly connected so as to hold the base end of the sleeve, so that the base end of the sleeve is tough. The effect of enabling the shaft and the sleeve to slide smoothly by sufficiently absorbing the influence pressure in the vertical direction of the shaft due to the swing of the swing link.

  In addition, the swing link is installed in this portal shape to prevent lateral swing and guide advancement and retraction, and the front and rear plates that serve as bearings for the rotary link are connected by the top plate for reinforcement. However, it can withstand the rotation of the rotating link, and by making the top and bottom of the front and rear plates narrow, the effect of enabling the space near the base portion to enter and exit from the core is as small as the sleeve.

Since the arcuate end surface that contacts the top plate is formed on the base end swing shaft portion of the swing link, the upward pressure on the swing shaft generated before and after the lower fulcrum of the rotary link is absorbed to lift the shaft base It is possible to suppress the rotation of the rotating link and to smoothly slide the shaft and the sleeve.

  As described above, in the mold for molding a product having the same outer shape by the clamping mechanism of the present invention, the core is made thicker by increasing the raising / lowering width of the spacer member of the core. This makes it possible to mold a sturdy product, and it is also possible to take out the product from the mold without affecting the slit frame plate only by moving in the lateral direction.

It is the simplified front view which shows the time of the fall of the core which abbreviate | omitted the front board of the clamp mechanism of the concrete formwork of this invention. It is a principal part front view at the time of the middle of the core of FIG. It is a principal part front view at the time of a raise of the core of FIG. It is the top view which abbreviate | omitted the upper surface board of the clamp mechanism of the core of the concrete formwork of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The core 1 of the present invention is used together with the main body of a concrete mold (not shown), and is used for manufacturing a hollow tube block.

The core 1 is interposed in a substantially circular cylindrical core frame 3 in which an opening 2 is formed over the entire length of the lower surface, and the opening 2 of the core frame 3, and the opening 2 extends over the entire length. A spacer member 4 having an inverted trapezoidal cross section is provided.
The spacer member 4 is provided with a slit frame plate 4A for forming a slit hole provided on one surface of the product, and a link mechanism 5A between the spacer member 4 facing the inner side of the ceiling portion 3A of the core frame 3; 5B is provided so that the spacer member 4 can be moved up and down.

Next, the configuration of the link mechanisms 5A and 5B will be described.
A bearing member 8 is fixed to the inside of the ceiling portion 3A of the core frame 3, and upper ends of the upper link rods 6A and 6B are pivotally attached 9 to the shafts on the front and back sides of the bearing member 8, respectively. The bearing member 10 is fixed on the spacer member 4 so as to face this, and the lower ends of the lower link rods 7A and 7B are pivotally attached 9 to the bearing member 10 so as to be rotatable.

A shaft 11 is disposed in the longitudinal direction in the core frame 3 at an intermediate portion between the upper links 6A and 6B and the lower links 7A and 7B.
A sleeve 12 is fitted on an outer peripheral surface of one end (the advancing / retreating mechanism side described later) of the shaft 11, and a holder bearing 14A is attached to the sleeve 12, and a lower end portion and a lower portion of the upper link rod 6A of the link mechanism 5A The upper end of the link rod 7A is pivotally attached 9.

On the other hand, the shaft 11 on which the link mechanism 5B is disposed on the opposite side of the sleeve 12 is similarly provided with a holder bearing 14B so that the lower end portion of the upper link rod 6B and the upper end portion of the lower link rod 7B are pivotally attached. is there.
In the drawing, an adjustment pipe 13 is integrally fixed to the shaft 11 and mounted with a holder bearing 14B so as to be moved up and down in alignment with the link mechanism 5A.

In addition, the crank mechanism 15, which is an advance / retreat means for the shaft 11 and the sleeve 12, includes a swing link 16, a rotation link 17, and a connecting member 18.
The base of the swing link 16 is connected to a bearing 19 provided at the base end of the shaft 11 by a pin 20 so as to be swingable, and the tip of the swing link 16 is pivotably connected to the tip of the rotary link 17. It is attached with a shaft.

Swinging movement of the swing link 16, together takes place in the outer space of the core 1, at the time of stretching of the clamping mechanism 15 in FIG. 1 (when the product is molded), a base end of the swing link 16 of the core 1 The shaft 11 is attached to the shaft 11 at a position close to the end face 1A ( position close to the limit ) without interfering (contacting) with the end face 1A.
By comprising in this way, the advancing / retreating distance can be obtained long due to the relationship between the core 1 and the end plate (not shown), which contributes to the raising and lowering of the spacer member.

The connecting member 18 is formed in a portal shape by the front and rear plates 18A and the upper surface plate 18B, and is welded and fixed integrally so as to hold the base end of the sleeve 12, and the rotating link 17 is attached to the extended tip portion. Is pivotally attached to the pin 22 and prevents the swing link 16 installed in the portal form from sideways and also serves as a guide for advancement and retreat.
By rotating the pivoted rotation link 17 by the handle 23, the shaft 11 and the sleeve 12 move relative to each other to expand and retract the link mechanisms 5A and 5B.

As the swinging link 16 swings, the base portion of the shaft 11 where the swinging shaft is located generates swinging pressure in the vertical direction and affects the end of the sleeve 12. Since it is strengthened, it can be absorbed sufficiently.
Further, the swing link 16 is formed with an arcuate end surface 16A that contacts the top plate at the periphery of the swing shaft (pin 20), and the upward direction to the swing shaft generated before and after the lower fulcrum of the rotary link 17 is formed. It has the effect of suppressing the lifting due to the pressure of.

In the method of using the core having such a configuration, the core 1 is mounted in an expanded state on a concrete mold body (not shown) (FIG. 1), and the concrete is cast to solidify the concrete.
When the core 1 is degenerated and demolded after solidification, first, the front and rear frames of the concrete mold body and the end plate on the crank mechanism 15 side are turned over.

  Next, the rotary link 17 is rotated 180 degrees from the state of FIG. 1 to the front side of the core 1 with the handle 23 so that the shaft 11 advances to the front side of the core 1 (the side where the crank mechanism 15 is mounted). Then, the connected rocking link 16 (shaft 11) and the connecting member 18 (sleeve 12) move relative to each other, and the linked link mechanisms 5A and 5B are degenerated and brought into close contact with the concrete product 2. The spacer member 4 having a small surface is raised (FIG. 2).

  As the spacer member 4 is raised, the side wall of the core 2 is flexed and contracted inward (actually, it has an auxiliary mechanism for contraction), and the core frame 3 is also separated from the contact surface of the concrete. The product can be pulled out from the mold body and the core 1 in the lateral direction.

  When the core 1 is returned to the original position for the next process of placing the concrete, if the handle is rotated 180 degrees in the reverse direction, the shaft 11 moves backward to the rear side of the core 1 and at the same time the sleeve 12 On the contrary, the link mechanisms 5A and 5B extend, the spacer member 4 descends, and the side wall portion of the core frame 3 returns to its original state by elasticity (FIG. 1).

  The embodiments of the present invention have been specifically described with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and other embodiments can be used without departing from the spirit of the invention. Is also applicable.

DESCRIPTION OF SYMBOLS 1 Core 2 Concrete product 3 Core frame 4 Spacer member 5 Link mechanism 6A, 6B Upper link rod 7A, 7B Lower link rod 8, 10 Bearing member 9 Pivot 11 Shaft 12 Sleeve 13 Adjustment pipe 14A, 14B Holder bearing 15 Crank Mechanism 16 Oscillating link 16A Arc-shaped end face 17 Rotating link 18 Connecting member 18A Front and rear plates 18B Top plate 19 Bearings 20, 21, 22 Pin 23 Handle

Claims (2)

Comprising a core frame having an opening over the lower surface of the entire length of the peripheral wall forming the frame surface of the cylindrical, a spacer member for opening and closing the opening with interposed said opening, said spacer member and said core frame is longitudinally shaft disposed between said shaft slidably insert the sleeve, the link mechanism for lifting the spacer member and the said sleeve shaft is provided, between said sleeve shaft in the by interposing a clamping mechanism, the core of forward and backward with the concrete form the link mechanism in conjunction elevating the spacer member of the said sleeve shaft,
The clamping mechanism swing link is configured from the rotary link and the connecting member, that the base swinging axis of the swinging link pivotally attached to the proximal end of the shaft, the rocking end of said rocking link it has pivotally attached the rotation end of the rotary link rotatably, to the base pivot axis of the rotary link and pivotably connected to a distal end portion of the connecting member formed integrally to extend in the sleeve, the pivot with the swinging of the link acting outside the core, proximal end for lifting the spacer member in the core of the concrete form, characterized in that close to a position where it does not interfere with the installation side end surface of the core Clamp mechanism. The connecting member is formed on the gate-shaped in longitudinal plate and the upper plate, and connected by fixing the proximal end of the sleeve so as to embrace, to prevent lateral deflection and device the swing links in該門form in addition to guiding the forward and backward, and wherein the swing link in contact to form the arcuate end surface to said upper plate in the proximal pivot shaft portion of the suppresses lifting due to pressure on the direction to the oscillation axis The clamp mechanism for raising / lowering the spacer member in the core of the concrete mold according to claim 1.

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