JPH0811402B2 - Clamping device for concrete formwork - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete mold clamping device, for example, a device for clamping a mold for molding a tubular concrete product such as a box culvert or a tubular body.

[0002]

2. Description of the Related Art Conventionally, as a mold clamping device for this type of concrete mold, for example, as described in Japanese Utility Model Laid-Open No. 3-106006, a receiver having an engaging recess at the lower end of a fixed mold body. The tool is integrally projected, and the guide plate is integrally projected at the lower end portion of the movable mold body to be matched with the fixed mold body, and the vertical hole is formed at the tip end portion of the guide plate. An engaging tool that can be engaged with and disengaged from the engaging recess is vertically movably inserted into the elongated hole, and a toggle lever is rotated by a spindle to one end of a rotating plate having a connecting rod connected to the engaging tool. There is known a structure in which a movable shaft is supported and an operation shaft rotatably mounted on the guide plate is fixed to the toggle lever.

[0003]

In the structure described in the above-mentioned publication, when the fixed mold body and the movable mold body are clamped, the receiving member of the fixed mold body and the guide plate of the movable mold body are aligned with each other. , When the toggle lever is rotated by rotating the operation shaft, the toggle lever pulls and rotates the rotating plate and the connecting rod in the direction in which the connecting plate is separated from the receiving member. Since the engaging member is moved upward along the long hole of the guide plate and the engaging member is engaged in the recess of the receiving member to perform mold clamping, it is troublesome to perform the mold clamping operation, and the mold opening operation is also performed. Since these operations are also required in this case, the mold opening operation also requires a lot of work, and in particular, this type of mold clamping device has a complicated structure considering the strength of the bottom frame of the fixed mold body and the bottom frame of the movable mold body. This is because it is often installed in a narrow space in the structure. The mold clamping operation and mold opening operation in a case such takes much labor is undesirable on overall work efficiency, its structure becomes complicated, there is a problem in that.

The present invention has been made in view of the above points, and the mold clamping operation and the mold opening operation are easy, and the mold clamping operation and the mold opening operation can be easily performed even in a narrow space. It is an object of the present invention to provide a mold clamping device for a concrete formwork, which can improve operability as a whole and has a simple structure and which is preferable in improving work efficiency.

[0005]

SUMMARY OF THE INVENTION A mold clamping device for a concrete formwork according to the present invention comprises a middle frame body having a mold body on an upper part, and a mold body provided so as to be movable back and forth with respect to the mold body of the middle frame body. A movable side frame body having a movable mold body that forms a cavity between the inner side frame body and the middle side frame body in a side view substantially C-shape at the outer end located on the movable side frame body side. A plurality of formed connecting bodies are rotatably supported, respectively, and an engaging recess is formed at one end of each connecting body, and the other end of each connecting body is provided on the movable side frame body side. A passive projection protruding toward the projection, and the movable side frame body rotatably supports a connecting rod having a handle at an outer end located on the side of each connecting body,
A plurality of engaging projections that engages with the engaging recesses in a disengageable manner are integrally provided on the connecting rod at positions facing the connecting bodies, and are located in the vicinity of the connecting rod. A pusher for pushing the passive protrusion of each of the connecting members toward the inner frame is provided.

[0006]

In the mold clamping device for concrete formwork of the present invention, the movable side frame body is advanced toward the middle frame body, and the plurality of pushers of the movable side frame body are pivotally supported by the middle frame body. When the movable frame body is further advanced toward the middle frame body while being brought into contact with the passive protrusions of the joint body, the pushers of the movable side frame body move the respective joint bodies of the middle frame body. The passive protrusions are respectively pushed toward the middle frame. Then, each connecting body having this passive protruding portion is rotated around the support shaft, and the engaging recessed portion at one end of each connecting body is provided on the connecting rod of the movable side frame body so as to protrude therefrom. The position of the movable side frame body is brought into contact with the end portion of the mold body of the middle frame body while being set to a position substantially the same as the position.

Next, when a handle protruding from the connecting rod of the movable frame is rotated, the connecting rod is rotated by this handle, and the engaging projections of the connecting rod are connected to the connecting members. Are engaged in the engaging recesses. Then, when the handle is further rotated, each connecting body is rotated toward the movable side frame body centering on the support shaft through the engaging concave portion at each engaging protrusion of the connecting rod, and at the same time, each engaging member is rotated. By moving the joint portion to a position displaced toward the movable side frame body with respect to the axis line in the direction connecting the center of the connecting rod and the center of the support shaft, the connecting rod and each connecting body are strongly tightened, In addition, the end of the movable mold body of the movable side frame body is strongly clamped to the end of the mold body of the middle frame body.

Therefore, the ends of the mold body of the middle frame body and the end portions of the movable mold body of the movable side frame body are easily clamped via the connecting rod and the plurality of connecting bodies, and this mold is used. The tightened state is locked.

Next, when the mold body of the middle frame body and the movable mold body of the movable side frame body are opened, when the handle is rotated in the opposite direction to that in the mold clamping operation, The engaging protrusions of the connecting rod are moved in a direction away from the movable-side frame body with respect to the axis of the direction connecting the center of the connecting rod and the center of the support shaft, so that the engaging protrusions of the connecting rod are Clamping between each connecting body is released, and the mold clamping between the end portion of the mold body of the middle frame body and the end portion of the movable mold body of the movable side frame body is released.

Then, each connecting body is automatically rotated about the support shaft, the engaging concave portion of each connecting body is separated from the position of each engaging protruding portion of the connecting rod, and the movable side frame body is formed. When the is moved backward, the movable mold body of the movable side frame body is released from the mold body of the middle frame body and easily opened. Therefore, the end portion of the mold body of the middle frame body and the end portion of the movable mold body of the movable side frame body are easily opened.

[0011]

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

In FIG. 1, reference numeral 1 denotes a fixed frame, which has a fixed base plate 2 horizontally arranged and fixed on its upper part, and horizontally arranged and fixed on its lower parts on both sides. The guide rails 3 are formed in an inverted H shape having the guide rails 3, and the guide rollers 4 are rotatably mounted on the outer ends of the guide rails 3 on both sides.

An intermediate frame body 5 is fixed on the fixed substrate 2. The middle frame body 5 has a middle frame base body 6 placed on the fixed substrate 2, and connecting frames 7 having a substantially U-shaped cross section are integrally formed at both ends of the middle frame base body 6 in the left-right direction. The mold bodies 8 are disposed and supported on the upper surfaces of the left and right connecting frames 7, respectively. The left and right mold bodies 8 have a middle-sized bottom plate 9 arranged on the left and right connection frames 7 and a middle-sized side plate 10 vertically arranged at the inner end portion of the middle-sized bottom plate 9.

Further, a plurality of pairs of brackets 11, one pair in the front-rear direction, are integrally disposed and fixed to the left and right connecting frames 7 outward at predetermined intervals. Mounting holes 1 on the left and right sides of the pair of brackets 11
2 and 13 are formed on the same plane so as to face each other.
In addition, the mounting holes 1 on the left and right sides of the pair of brackets 11 in each set described above.
A connecting body 15 is rotatably and rotatably supported by a support shaft 14 on a selected one of the two and 13, respectively.

Each of the plurality of connecting bodies 15 is formed in a substantially C-shape in side view, and an engaging recess 16 is formed at one end of each connecting body 15 and each engaging recess 16 is formed. A tip portion of an adjusting bolt 17 is screwed therein so as to be able to move back and forth, and a lock nut 18 is screwed on each adjusting bolt 17. Further, an insertion hole 19 is formed in the vicinity of the other end of each of the connecting bodies 15 so as to insert the support shaft 14 in a removable manner, and a passive projection 20 is provided at the other end of each of the connecting bodies 15 to be described later. It is formed so as to integrally project toward the movable side frame body side. Further, the respective connecting bodies 15 are connected to each other by a common interlocking rod 21. Then, each of the connecting bodies 15 is supported rotatably in the up-and-down direction integrally with each of the support shafts 14 as a center,
The outer edge portion 22 near the insertion hole 19 is normally brought into contact with the mounting plate 23 of each bracket 11.

Next, the movable bodies 24 are respectively engaged with the guide rollers 4 of the guide rails 3 on both sides so as to be movable back and forth, and the inner ends of the movable bodies 24 on both sides engage with the guide rails 3. A combined guide roller 25 and a guide roller 27 that engages with a guide 26 formed on the lower surface of the fixed substrate 2 are rotatably supported. The movable bodies 24 on both sides are respectively connected to the guide rollers 4, 25, 27.
It is supported freely in and out.

Support frames 28 are vertically fixed integrally to the outer ends of the movable bodies 24 on both sides, and movable side frames 29 are fixed integrally on the support frames 28 on both sides. Movable mold bodies 30 that are supported and that form a cavity A between the movable frame body 29 on both sides and form the mold body 8 of the middle frame body 5 are vertically fixed integrally. .

Further, the movable side frame bodies 29 on both sides are provided with outer end portions located on the side of the respective connecting bodies 15, that is, the movable side frame bodies 29.
In the movable bottom frame 31, a plurality of pairs of brackets 32, one pair in the front-rear direction, are integrally projected and fixed downward at predetermined intervals, and the brackets 32 of each pair on both sides are fixed. The interlocking rods 33 arranged horizontally are rotatably mounted on the shaft. Thus, the interlocking rods 33 on both sides are arranged and supported on the same plane as the support shaft 14 which pivotally supports the connecting bodies 15. In addition, the interlocking rods 33 on both sides are provided with the engaging recesses 16 at positions facing the connecting bodies 15.
Shaft-shaped engaging projections 34 that engage with each other are integrally projected in parallel with the interlocking rods 33, and handles 35 are integrally projected at one side of the interlocking rods 33 on both sides thereof. .

Further, it is located in the vicinity of the interlocking rods 33 on both sides, that is, between the movable bottom frames 31 of the movable side frame bodies 29 on both sides and the inner ends of the brackets 32 of each set. The pushers 36 are integrally fixed to the respective pushers 36, and the pushers 36 on both sides are
The passive protrusions 20 of the connecting bodies 15 on both sides are pushed toward the connecting frame 7 side of the middle frame body 5. In addition, a packing 37 that abuts the lower end of the movable mold body 30 is integrally fixed to the outer end portion of the middle mold bottom plate 9 of the mold body 8, and the movable mold is attached to the outer end portion of the middle mold bottom plate 9 by the packing 37. The lower end of the body 30 is adapted to be watertightly engaged.

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

First, for each pair of brackets 11 each including one pair of the inner frame body 5, each connecting body 15 is rotated by the spindle 14 into each mounting hole 12 formed in the inner portion thereof. When the left and right moving bodies 24 are pushed toward the middle frame body 5 in a freely supported state, the left and right moving bodies 24 are guided by the guide rollers 4,
Left and right guide rails 3 of the fixed frame 1 via 25 and 27
The movable side frame members 29, which are moved along the movable frame members 24 and are supported by the support frames 28 fixed to the left and right moving members 24, are advanced toward the middle-sized side plate 10 of the middle frame member 5, respectively. A plurality of 29 pushers 36 are respectively brought into contact with the passive projections 20 of the plurality of connecting bodies 15 pivotally supported by the brackets 11 of the middle frame 5.

When the left and right movable side frame members 29 are further advanced toward the middle frame member 5, the left and right movable side frame members 29 are moved.
The passive protrusions 20 of the connecting bodies 15 of the middle frame body 5 by the pushing bodies 36 of 29
Are pushed toward the middle frame body 5, respectively, and the passive protrusions are
Each connecting body 15 having 20 is rotated counterclockwise in FIG. 1 about the support shaft 14, and the engaging recess 16 at one end of each connecting body 15 is connected to the connecting rod 33 of the movable side frame body 29. The movable mold body of the movable side frame body 29 is attached to the outer end portion of the middle-sized bottom plate 9 of the middle frame body 5 while being set to be rotated upward at a position substantially the same as the position of each of the engaging projection portions 34 projecting. The lower end of 30 is abutted via packing 37.

Next, when the handle 35 projecting from the connecting rod 33 of the left and right movable side frame members 29 is rotated counterclockwise in FIG. 1, the connecting rod 33 is rotated by this handle 35. At the same time, the engaging protrusions 34 of the connecting rod 33 are engaged in the engaging recesses 16 of the connecting bodies 15, respectively. And handle
When 35 is further rotated, each connecting body 15 is moved in the counterclockwise direction in FIG. 1 about the support shaft 14 via the engaging recess 16 in each engaging projection 34 of the connecting rod 33. While being rotated toward the bottom frame 31, each of the engaging protrusions 34 is displaced to the movable frame 29 side with respect to the axis of the direction connecting the center of the connecting rod 33 and the center of the support shaft 14. By the movement, the connection rod 33 and each connection body 15 are strongly tightened, and the movable mold bodies of the left and right movable side frame bodies 29 are attached to the outer end portions of the left and right medium size bottom plates 9 of the middle frame body 5.
The lower end of 30 is tightly clamped via packing 37.

In this case, since the adjusting bolts 17 are respectively screwed into the engaging recesses 16 formed to project from one end of each connecting body 15 so as to be able to move forward and backward, the adjusting bolts 17 are rotated to move forward and backward. By adjusting, it is possible to easily perform the mold clamping adjustment operation by each connecting body 15 and each engaging projection 34 of the connecting rod 33, and easily correct the excess or deficiency of the mold clamping condition to bring it into a proper state. Can be set.

Therefore, the connecting rod 33 and the plurality of connecting bodies 15
The outer end portions of the left and right medium bottom plates 9 of the middle frame body 5 and the lower end portions of the movable mold bodies 30 of the left and right movable side frame bodies 29 are easily clamped via the and the clamped state is locked. It Then, the outer ends of the left and right medium-sized bottom plates 9 of the middle frame 5 and the left and right movable side frame
The lower ends of the movable mold bodies 30 of 29 are clamped in a watertight manner via a packing 37, and between the left and right medium side plates 10 of the middle frame body 5 and the movable mold bodies 30 of the left and right movable side frame bodies 29. A cavity 38 is constructed. Although not shown, the middle frame body 6 of the middle frame body 5
A gable plate is arranged and supported before and after. And the cavity 38
A concrete product is molded by the front and rear gable plates (not shown).

Next, when the mold 8 of the middle frame 5 and the movable molds 30 of the left and right movable side frames 29 are opened, the handle 35
1 is rotated clockwise in the direction opposite to the direction of the mold clamping operation, the engaging projections 34 of the connecting rod 33 move in the direction connecting the center of the connecting rod 33 and the center of the support shaft 14. By being moved in a direction away from the movable bottom plate 31 of the left and right movable side frame body 29 with respect to the axis, the tightening between each engaging projection 34 of the connecting rod 33 and each connecting body 15, is released, The outer ends of the left and right medium bottom plates 9 of the middle frame body 5 and the movable mold bodies 30 of the left and right movable side frame bodies 29.
The mold clamping with the lower end of is released.

Then, each connecting body 15 is supported by its own weight.
1, the engaging recess 16 of each connecting body 15 is separated from the position of each engaging protrusion 34 of the connecting rod 33, and is movable left and right. Side frame
When 29 is moved backward, the movable mold bodies 30 of the left and right movable side frame bodies 29 are released from the middle bottom plate 9 of the middle frame body 5 and easily opened. Therefore, the left and right mold bodies 8 of the middle frame body 5 and the movable mold bodies 30 of the left and right movable side frame bodies 29 are easily opened, and the movable mold bodies 30 of the left and right movable side frame bodies 29 are made of concrete. It is released from the product. The front and rear gable plates are opened as necessary, and the mold body 8 of the inner frame body 5 is prepared for taking out the concrete molded product.

Next, a pattern or the like is formed, for example, on the surface portion of the concrete molded product between the middle mold bottom plate 9 of the left and right mold bodies 8 of the middle frame body 5 and the movable mold bodies 30 of the left and right movable side frame bodies 29. Depending on the distance between the left and right mold bodies 8 of the middle frame body 5 and the movable mold bodies 30 of the left and right movable side frame bodies 29 such as interposing a pattern mold body to be molded, one pair of the middle frame bodies 5 is set. Brackets for each set
With respect to 11, a connecting shaft 15 is pivotally supported by a supporting shaft 14 in respective mounting holes 13 formed on the outer side thereof. Then, each connecting body 15 and the connecting rod 33 having the engaging projection 34 are disengaged in the same manner as in the above case, so that the middle frame body 5 having the mold body 8 and the movable side frame having the movable mold body 30. The body 29 can be easily clamped and opened.

In the above-mentioned embodiment, the case where the connecting bodies 15 pivotally supported on the brackets 11 of each set of the middle frame body 5 are connected by the common interlocking rods 21 has been described.
Not limited to this, each connecting body 15 may rotate independently about the support shaft 14. Further, the passive protrusions 20 of each connecting body 15 may be pushed by a pusher body 36 common to each, and by the pusher bodies 36 individually arranged for each passive protrusion 20. It may be pushed.

Further, in the above embodiment, each connecting body 15 is a support shaft.
The case where the shaft 14 is rotatably supported by the shaft 14 and is rotated and returned by its own weight has been described. However, the present invention is not limited to this, and each connecting body 15 rotatably supported by the support shaft 14 is, for example, a spring. The passive projections 20 are constantly supported and are made to project toward the pusher 36 of the movable side frame 29 at all times, and the respective engagement recesses 16 interfere with the engagement projections 34 of the connecting rod 33. You may make it isolate | separate in the position which is not.

Further, in the above-mentioned embodiment, the case where the middle mold side plates 10 on the left and right mold bodies 8 are arranged vertically is not limited to this, but the middle mold side plates 10 are inclined according to concrete products, for example. You may form it.

[0032]

According to the present invention, the inner frame body having the mold body has a plurality of connecting bodies formed in a substantially C-shape in a side view at the outer end of the support body so as to be rotatable. The movable side frame body having the movable mold body is provided with a handle at the outer end thereof while the engaging concave portion is formed at one end portion of each coupling body and the passive protruding portion is projectingly provided at the other end portion. Rotatably supporting a connecting rod having a plurality of engaging projections integrally projectingly engaged with the engaging recesses at positions facing the connecting bodies. Then, since the pusher body located in the vicinity of the connecting rod and for pushing the passive projecting portion of each connecting body toward the inner frame body side is provided, the passive projecting portion of each connecting body is formed by this pusher body. By pushing the, each connecting body is rotated around the support shaft, and the engaging concave portion of each connecting body is set to a position where it can be engaged with each engaging protruding portion of the connecting rod. Therefore, by rotating the connecting rod with the handle, the engaging projections of the connecting rod are engaged with the engaging recesses of the connecting rods to rotate the connecting rods. Can be securely locked. Further, by rotating the connecting rod to release the engagement between the engaging projections and the engaging recesses of the connecting bodies, the lock between the connecting bodies and the connecting rod can be easily released. Therefore, the mold clamping operation and the mold opening operation between the middle frame body and the movable side frame body are easy, and the mold clamping operation and the mold opening operation can be easily performed even in a narrow place, and the operability is improved as a whole. It is possible to provide a mold clamping device for a concrete formwork, which has a simple structure and is preferable in improving work efficiency.

[Brief description of drawings]

FIG. 1 is a partial front view showing a mold clamping device for a concrete form showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view showing the mold clamped state.

FIG. 4 is a front view showing the same mold opening state.

[Explanation of symbols]

 5 Middle frame 8 Type body 14 Spindle 15 Coupling body 16 Engagement recess 20 Passive protrusion 29 Movable side frame 30 Movable die 33 Connection rod 34 Engagement protrusion 35 Handle 36 Pusher

Claims (1)

[Claims] 1. A movable side frame body having a middle frame body having a mold body on an upper part thereof, and a movable mold body which is provided so as to be movable back and forth with respect to the mold body of the middle frame body and forms a cavity between the mold body and the movable frame body. The inner frame body rotatably pivotally supports a plurality of connecting bodies formed in a substantially C-shape in a side view on a support shaft at an outer end portion located on the movable side frame body side. An engaging recess is formed at one end of each connecting body, and a passive protrusion protruding toward the movable side frame is provided at the other end of each connecting body, The body rotatably supports a connecting rod having a handle at an outer end located on the side of each connecting body, and the connecting rod can be engaged with and disengaged from each engaging recess at a position facing the connecting body. A plurality of engaging projections that are engaged with each other are integrally provided, and the passive projections of each of the connecting bodies are located in the vicinity of the connecting rod and the intermediate frame is provided. Mold clamping device of concrete form, characterized in that a pusher that pushes towards.