JPH08294909A - Clamping device for concrete form - Google Patents

Abstract

PURPOSE: To easily attach or detach the part of a coupler to a connecting position capable of magnetically guiding the coupler by providing a magnetic attaching or detaching mechanism for attracting the part of a toggle lever to the other end side of the coupler and a magnetic guiding mechanism at the other form member side. CONSTITUTION: When an operating shaft 1 is rotated counterclockwisely, a rotary force is transmitted to the magnet 17 of a magnetically attaching or detaching mechanism provided at the one end side of a toggle lever 3, and the magnetic unit 18 of the mechanism of a coupler 5 coupled at the rotary shaft on the lever 3, and hence rotated at the same angle as the rotation of the lever 3. That is, the coupling part 6 of the coupler 5 and the magnetic element 14 of the outer periphery are moved to the other form member B side. The element 14 is brought into contact with the magnet 13 side of the other magnetic guiding mechanism by the movement. Further, when the shaft 1 is rotated, the mechanisms 13, 14 always brought into contact cannot be rotated, and magnetically attaching and detaching mechanisms 17, 18 are separated over the attraction force. When it is further rotted, the part 6 moving together with the mechanism 14 is connected to the hook 10 of the other form member B side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete form fastening device capable of reducing the manufacturing cost by using a magnetic guide as a guide element for controlling the movement of a connecting portion.

[0002]

2. Description of the Related Art Various fastening devices using a toggle mechanism have been proposed as fastening devices for concrete formwork. In order to adapt the fastening device using the toggle mechanism for the formwork,
A mechanism that allows the mold to be opened widely, that is, a mechanism that allows one end of a toggle lever or a connection lock to be freely engaged and disengaged has been used. Now, in the fastening device of this mechanism, the connecting portion and the engaging portion which moves integrally with the connecting portion when engaging and disengaging hang down downward by its own weight, and at the time of the next engagement, The hanging position must be moved to the proper position. In order to eliminate such drawbacks, a guide plate that projects outward or on the side of the mold that forms a pair is prepared for the concrete form, and the slanting surface provided on this guide plate causes the downward movement of the guide plate. As a result, the tightening and disengagement can be performed repeatedly without human intervention.

[0003]

However, by adding a mechanical element such as a guide plate in this way, the shape of the connecting portion side or the hook side for receiving the engaging portion becomes complicated. Further, when assembling these, it takes time and effort to connect the connecting portion side and the guide element, so that the cost for replacing or changing the mold once assembled is very high. Thus, the present invention simplifies the condition of engagement with the guide plate, and provides a fastening device for a concrete formwork, which can be easily attached and detached even after replacement or modification of the mold after use or maintenance, and which can reduce the manufacturing cost. It is a thing.

[0004]

In order to achieve the above-mentioned object, the invention of claim 1 is rotatably supported by a support member attached to one of the mold members which are mutually fastened. A toggle lever, and a connecting portion that is eccentrically supported with respect to the toggle lever and rotatably supported eccentrically from a rotation axis of the toggle lever, and has an engaging portion at one end that engages with the other mold member. In a concrete formwork connecting device in which the engaging part can be attached to and detached from the other formwork member by rotating the toggle lever, a part of the toggle lever and the other end side of the connecting part are connected to each other. A magnetic attaching / detaching mechanism for magnetically adsorbing is provided on the other side, and a magnetic guide mechanism is provided on the other mold frame member side along the fastening direction. One end side of the connecting part can be magnetically guided along It is characterized in that the.

According to a second aspect of the present invention, there is provided a magnetic body which is provided so as to project from one end of the connecting portion and which magnetically comes into contact with the connecting portion to attract and support the connecting portion. It is characterized in that it is composed of a magnet having a magnetic sliding guide surface that magnetically attracts slidably.

According to a third aspect of the present invention, a magnetic body is provided so as to project from one end side of the connecting portion and magnetically contacts with the connecting portion so as to adsorb and support the connecting portion. It is characterized in that it is constituted by a magnet having a magnetic guide space that magnetically restrains the trajectory of the magnetic body by sandwiching it.

[0007]

Since the present invention is constructed as described above,
According to the invention of claim 1, the following effects are brought about. That is, by providing a magnetic attachment / detachment mechanism for magnetically attracting each other on a part of the toggle lever and the other end of the connecting portion, the connecting portion and the toggle lever are integrated as long as the magnetic attraction force of the magnetic attaching / detaching mechanism allows. Done. The center of the movement corresponds to the center of rotation of the toggle lever. Furthermore, a magnetic guide mechanism is provided on the other mold member side along the fastening direction, and one end side of the connecting portion is magnetically guided along this magnetic guide mechanism until the engaging portion engages with the other mold member. The mechanism required for guiding the connecting portion is magnetically guided because it can be guided in a magnetic field. Therefore, it is easy to attach and detach the contact between the connecting portion and the guide mechanism. Now, in the state in which the connecting portion and the toggle lever are integrally rotated, one end side of the connecting portion hits the magnetic guide mechanism and is magnetically coupled. When it is further rotated, the toggle lever and the connecting part, which have been integrally rotated until now, are disengaged from the magnetic attachment / detachment mechanism connecting them, and as a result, one end side of the connecting part is a magnetic guide mechanism. It becomes adsorbed and hangs down. When the toggle lever is further rotated in the same direction in this state, the connecting portion moves around the rotating shaft 4 so as not to be disengaged from the magnetic guide mechanism, and as a result, the engaging portion provided on one end side of the connecting portion. Is naturally guided to the engagement position of the other mold member, and both mold members are fastened. In addition,
Both the magnetic attachment / detachment mechanism and the magnetic guide mechanism described above rely exclusively on magnetic movement. Therefore, there is no functional change in the entire device in any orientation.

According to the invention of claim 2, in addition to the above-mentioned action, a magnetic guide mechanism is provided so as to project to one end side of the connecting portion, and a magnetic body for magnetically contacting and supporting the connecting portion by suction is provided. , A magnet provided along the fastening direction and provided with a magnetic sliding guide surface for slidably magnetically attracting the magnetic body, so that the attracting portion magnetically supporting one side of the connecting portion is projected. It is a magnetic body, and since it is in contact with this protruding magnetic body on the magnetic sliding guide surface, it can slide freely while the adsorption conditions are stable.

According to the invention of claim 3, in addition to the operation of claim 1, a magnetic guide mechanism is provided so as to project to one end side of the connecting portion and magnetically contacts to support the connecting portion by suction. It is surrounded by a magnet (magnetic body) by being composed of a magnetic body and a magnet provided along the fastening direction and provided with a magnetic guide space that magnetically restrains the trajectory of the magnetic body with the magnetic body sandwiched therebetween. When a magnetic body (magnet) protruding from the side of the connecting portion is inserted into the magnetic guide space formed as a structure, this magnetic body does not come off unless a stress exceeding the magnetic attraction force is applied from the magnetic guide space, and the guide direction Only freely moveable. Further, since the magnetic attraction effect is exerted in the sandwiched space, the variation of the attraction force is small with respect to the subtle difference in the contact state between the two.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. [Description of FIGS. 1 to 4] FIGS. 1 to 4 are partial cross-sectional side views showing an embodiment of the present invention, the cross section of which is a bottom view of the state of FIG. 4 seen from the bottom side. It is based on the aa section line. Further, all of these four figures disclose the same structure by changing the position of each part.

[Name of Each Part] Each part in FIGS. 2 to 4 is the same as that in FIG. The description will be centered on FIG. In the figure, A is one mold member, B is the other mold member, 1 is an operating shaft, 3 is a toggle lever, 4 is a rotating shaft, 5 is a connecting portion,
6 is an engaging portion, 7 and 8 are nuts, 9 is a hook supporting portion,
10 is a hook portion, 11 is a support plate, 12 is a protruding plate, 13 is a magnetic guide mechanism (magnet), 14 is a magnetic guide mechanism (magnetic body), 15
Is a magnetic sliding guide surface, 16 is a support plate, 17 is a magnetic attachment / detachment mechanism (magnet), and 18 is a magnetic attachment / detachment mechanism (magnetic body). [Description about the relation of each part]

One mold member A and the other mold member B are fastened to each other. One of the form members A has a support plate
11 is connected. The operation shaft 1 is provided on a part of the support plate
Is rotatably penetrated. A toggle lever 3 is attached to the operation shaft 1, and the toggle lever is also rotated with the rotation of the operation shaft 1. The toggle lever 3 is provided with a rotation shaft 4 at a position slightly apart from the operation shaft 1 so as to rotate eccentrically from the rotation axis of the operation shaft 1, and a support plate 16 with one end of the toggle lever protruding. There is.

A connecting portion is rotatably provided on the rotating shaft 4, and one end of the connecting portion is extended with respect to the rotating shaft 4 and an engaging portion 6 is provided on the tip side thereof. The other side of the mating portion 6 opposite to the other side is extended relatively shortly, and a magnetic body 18 forming a part of the magnetic attachment / detachment mechanism is fixed. The engaging portion 6 penetrates the inside of the magnetic body 14 forming the other side of the magnetic guide mechanism, and the state is maintained while being tightened and positioned by the nuts 7 and 8 provided at both ends thereof. Magnetic body 14
Has a shape protruding toward the hook side, and this protruding portion contacts the magnetic sliding guide surface 15. On the other hand, a magnetic plate 18 provided at the other end of the connecting portion is fixed to a support plate 16 provided at the toggle lever 3 and a magnet that attracts the magnetic body 18 with no space.

The other frame member B is provided with a hook support portion 9 substantially vertically, and the hook portion is provided on one side of the hook member so as to project. Hook support 9
A protruding plate 12 made of a magnetic material is fixed to the substantially central side surface of the. A magnet 13 forming a magnetic guide mechanism is provided on the hook side of the projecting plate 12. The surface of the magnet 13 on the hook portion 10 side is formed relatively flat to form a magnetic sliding guide surface 15.

[Operation of Each Part] FIG. 1 shows a state in which one mold member A and the other mold member B are about to be fastened, and there is a slight gap between both mold members. Can be seen. When the operation shaft 1 is rotated counterclockwise, the rotational power is transmitted to the magnet 17 of the magnetic attachment / detachment mechanism provided at one end of the toggle lever via the toggle lever 3. Since the magnetic body 18 of the magnetic attachment / detachment mechanism provided on the other side of the connecting portion connected by the rotary shaft on the toggle lever 3 is magnetically attracted and adsorbed by the magnet 17, rotation of the toggle lever 3 is prevented. The connecting part rotates at the same angle. That is, the engaging part 6 provided on one side of the connecting part and the magnetic body 14 provided on the outer periphery of the engaging part 6 move to the other mold member B side. Along with this movement, the magnetic body 14 comes into contact with the magnet 13 side of the other magnetic guide mechanism. This state is shown in FIG.

In FIG. 2, when the operation shaft 1 is further rotated in the same direction, the magnetic guide mechanisms 13 and 14 already in contact with each other.
However, since it does not move in the rotation direction any more, the turning force is all applied to the magnetic attachment / detachment mechanism formed on the other side of the toggle lever and the connecting portion. When it is further rotated, the attraction force of the magnetic attachment / detachment mechanism is exceeded, and the two mechanisms are separated. This state is shown in FIG.

In FIG. 3, when the operation shaft is further rotated in the same direction, the connecting portion is dragged to the left side in the drawing around the rotation shaft on the toggle lever. In this state, the other end of the connecting portion is also slid to the left by the action of the magnetic guide mechanisms 13 and 14. As a result, the engaging portion 6 that moves together with the magnetic guide mechanism 14 is guided to the hook portion 10 provided on the other mold member B side and engages with each other.

FIG. 4 shows a state in which the operating shaft 1 is further rotated in the same direction in the above-mentioned state in which the two engaging members are engaged with each other, and the two mold members are rotated until they come into close contact with each other. The fastening work is completed in this state.

The structure and method of use of one embodiment of the present invention have been described above. However, as for each constituent element, other embodiments shown below can be obtained as required. In the magnetic guide mechanism based on the magnetic contact described above, the attraction force varies relatively greatly depending on the contact state. An embodiment of the magnetic guide mechanism capable of relatively reducing this variation will be described with reference to FIG. [Description of FIG. 6] FIG. 6 is a partially enlarged perspective view of the magnetic guide mechanism. In the figure, a magnet 13 and a magnetic concentration yoke provided so as to sandwich the magnet 13 below the protruding plate 12 provided on the hook support portion 9 constitute the other form member side of the magnetic guide mechanism. There is. The cross-sectional shape of this magnetic concentration yoke is a substantially rectangular shape that bulges inward with the magnet 13 in the lower part of the drawing. As a result, a relatively narrow magnetic concentration is formed below the two magnetic concentration yokes, and the magnetic concentration forms a magnetic guide space 15 '.

In the figure, the magnetic body 14 'constituting the other magnetic guide mechanism is provided between the magnetic guide spaces 15', and the material thereof is, for example, an iron material. This magnetic body 1
4'is a connection plate 14 "made of a non-magnetic material provided below it
The engaging rod holding member 6'for supporting the engaging portion 6 formed of the engaging rod is connected via the. Further, in the drawings shown, an adjusting nut is provided on the left side of the engagement rod holding member 6 ', and further on the left side, it is in communication with the main body of the connecting portion. As described above, the weight of the connecting portion is due to the fact that the magnetic body 14 'provided on the engaging rod holding member 6'is held by the magnetic attraction force of the magnetic guide space 15', and the magnetic guide space 15 'is held. Is provided in the direction in which the engaging portion 6 is guided to the hook side. Therefore, the hook and the engaging portion are naturally engaged by moving the connecting portion to the left side in the drawing by the rotation of the toggle lever 3.
Further, the magnetic attraction action in the magnetic guide space 15 'provides a play movable up and down by the same distance as the vertical width of the magnetic body 14' in the figure, and the attraction force during that is not extremely reduced. Therefore, the suction action is relatively stable.

In the magnetic guide mechanism by magnetic contact shown in FIGS. 1 to 4, the impact at the time of contact is directly transmitted to the magnet body. In particular, a permanent magnet having a high magnetic force such as a rare earth magnet is vulnerable to an impact, so that the magnet is damaged with a relatively high probability during repeated use. An embodiment that solves such a problem will be described with reference to FIGS. 7 and 8. [Explanation of FIG. 7] In FIG. 7, another magnetic guide mechanism is provided at the same position as the magnetic guide mechanism shown in FIG. 4, and the state is partially cross-sectioned at the line bb cross section line in FIG. It is a partial cross-sectional side view showing the appearance. In the figure, 9 is a hook support portion connected to the other mold member B side, 13 and 14 are magnetic guide mechanisms (specifically, 13 is a permanent magnet, 14 is a magnetic body), 6
Is an engaging portion, and 7 is a nut, which correspond to the articles having the same contents as those of the embodiment described in FIG. 1. Especially, the difference is that a non-magnetic material (for example, an aluminum alloy) is provided between the hook supporting portions 9. ) Is newly provided, and two magnetic plates 7A are provided in the recess of the concave shape so as to sandwich the permanent magnet 13 along the vertical direction in the figure. The magnetic plate 7A is slightly larger than the permanent magnet 13 in the vertical direction, and as a result, the magnetic plate 7A projects toward the engaging portion 6 side. The magnetic body 14 attached to the engaging portion 6 is attracted to the protruding position. Further, the magnetic circuit formed by the magnetic force lines at the time of attraction is, as shown by 7B, the permanent magnet 13, the magnetic plate 7A, the magnetic body 14, the magnetic plate 7A and the permanent magnet.
It forms a loop called 13. With the above configuration, most of the impact force of the magnetic substance 14 magnetically attracted to the magnetic plate 7A and adsorbed is transmitted to the spacer 7B, and the permanent magnet 13
The shock is not transmitted to the. The above mechanism can be similarly applied to a magnetic desorption mechanism.

[Explanation of FIG. 8] FIG. 8 shows another magnetic guide mechanism provided at the same position as the magnetic guide mechanism shown in FIG.
FIG. 4 is a partial cross-sectional side view showing a state in which the state is partially sectioned at a line bb sectional line position in FIG. In the figure,
9 is a hook support portion connected to the other formwork member B side, 12
Is a projecting plate, 13 and 14 are magnetic guide mechanisms (specifically 13 is a permanent magnet, 14 is a magnetic body), 6 is an engaging portion made of a magnetic material, and 7 is a nut. These are described in FIG. It corresponds to the article of the same content as the above-mentioned embodiment, and the difference is that the protruding plate 12 provided between the hook support portions 9 is made of a magnetic material, and the protruding plate 12 is located below the permanent magnet 13 in the figure. The cushion magnetic plate 8A is provided, and as a result, the engaging portion 6 is formed.
The magnetic attraction with the magnetic plate 7A on the side is the magnetic plate 8A for this cushion.
Done through. In addition, the magnetic circuit formed by the magnetic lines of force at the time of attraction includes a loop of the permanent magnet 13, the cushion magnetic plate 8A, the magnetic body 14, the engaging portion 6, the cushion magnetic plate 8A, and the permanent magnet 13 as shown by 8B. I'm forming. With the above-described configuration, most of the impact force of the magnetic body 14 that is magnetically attracted and adsorbed is the cushion magnetic plate 8A.
The impact is not transmitted to the permanent magnet 13. The above mechanism can be similarly applied to a magnetic desorption mechanism.

[0023]

Since the present invention is configured as described above, according to the invention of claim 1, the following effects can be obtained. That is, the connecting portion provided on the side of one mold member makes a relatively large rotational movement in a state where it is magnetically connected to the toggle lever by the magnetic attaching / detaching mechanism, and It is separated from the magnetic guide mechanism provided on the mold member side. On the other hand, when the toggle lever is rotated counterclockwise in FIG. 1, the magnetic body provided on the one end side of the connection portion which has been free until now is attracted to the magnetic guide mechanism, and magnetically the magnetic guide mechanism is provided. Connected to. As mentioned above, this connection is very easy to put on and take off. Conventionally, in order to connect this kind of guide member, it was necessary to repeatedly attach and detach various attachment mechanisms. However, in the present invention, no work cost is required for the attachment and detachment without needing to describe the details.

According to the invention of claim 2, in addition to the above effects, the following effects are exhibited. That is, in the case where the present invention is produced, for example, in the conventional case, the support plate of one mold member is made to have a unique shape such that it is extended to the other mold member, or the guide plate unique to this support plate is used. There was a need for costly molding, such as forming holes in the. However, in the present invention, for example, in the formation of the magnetic guide mechanism, a rectangular magnet is attached to a side surface of the hook support portion of the other mold member at a predetermined position, and an iron material or the like is projected near the corresponding engaging portion. It is only to provide the magnetic body formed by. In this way, the mechanical manufacturing cost can be greatly reduced.

According to the invention of claim 3, claim 1
In addition to the above effects, the following effects are achieved. That is, the magnetic guide mechanism is provided so as to project to one end side of the connecting portion, and is provided along the fastening direction with the magnetic body that magnetically contacts and adsorbs and supports the connecting portion. A magnetic body (magnet) protruding from the connecting portion side in the magnetic guide space formed by being surrounded by the magnet (magnetic body) by being configured with a magnet having a magnetic guide space that constrains the trajectory of the magnetic body.
When the magnetic disk is inserted, the magnetic body does not come off from the magnetic guide space unless stress exceeding the magnetic attraction force is applied, and furthermore, the magnetic body can freely move only in the guide direction. Further, since the magnetic attraction effect is exerted in the sandwiched space, the variation of the attraction force is small with respect to the subtle difference in the contact state between the two. As described above, even if there is a concern about the magnetic holding of the connecting portion, it is possible to hold it by a reliable magnetic force with the above structure.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention and shows a state in which mold members are separated from each other.

FIG. 2 is a side view of the same embodiment shown in FIG. 1 and shows a state where the magnetic guide mechanisms of the two are attracted to each other.

FIG. 3 is the same embodiment as shown in FIG. 1, but shows a state where the magnetic guide mechanisms of the two are attracted to each other and the engagement is incomplete.

FIG. 4 is the same embodiment as shown in FIG. 1 and shows a completely engaged state.

5 is a bottom view of the entire device showing the cross-sectional position of FIG. 1. FIG.

FIG. 6 is a partial cross-sectional perspective view showing another embodiment of the magnetic guide mechanism.

FIG. 7 is a partial cross-sectional side view showing another embodiment of the magnetic guide mechanism.

FIG. 8 is a partial cross-sectional side view showing still another embodiment of the magnetic guide mechanism.

FIG. 9 is a side view showing a conventional technique.

[Explanation of symbols]

 A ... One mold member B ... The other mold member 1 ... Operation shaft 3 ... Toggle lever 4 ... Rotation shaft 5 ... Connection part 6 ... Engagement part 7 and 8 ... Nut 9 ... Hook support part 10 ... Hook part 11 … Support plate 12… Projection plate 13… Magnetic guide mechanism (magnet) 14… Magnetic guide mechanism (magnetic material) 15… Magnetic sliding guide surface 16… Support plate 17… Magnetic detachment mechanism (magnet) 18… Magnetic detachment mechanism (magnetism) body)

Claims (3)

[Claims] 1. A toggle lever (3) rotatably supported by a support member (11) attached to one mold member (A) of mold members (A, B) to be fastened to each other, and the toggle lever (3). An engaging portion that is eccentrically supported on the lever (3) from the rotation axis of the toggle lever (3) and is rotatably supported, and has one end engaged with the other mold member (B).
And a connecting portion (5) having (6), and by rotating the toggle lever (3), the engaging portion (6) is moved to the other mold member (
In a concrete form connecting device that can be attached to and detached from (B), a part of the toggle lever (3) and a connecting part (
Magnetic detachment mechanism (17, 18) that magnetically attracts each other to the other side of 5)
And a magnetic guide mechanism (13, 14) is provided along the fastening direction on the other mold member (B) side, and the engaging portion (6) engages with the other mold member (B). This magnetic guide mechanism to the position
A connecting device for a concrete formwork, characterized in that one end side of the connecting portion (5) can be magnetically guided along (13, 14). 2. The connecting portion (5) is provided so as to project to one end side,
A magnetic material (1
4) and a magnet (1) provided along the fastening direction and provided with a magnetic sliding guide surface (15) for slidably attracting the magnetic body (14).
3. The concrete form connecting device according to claim 1, wherein the magnetic guide mechanism (13, 14) is composed of 3). 3. The connecting part (5) is provided so as to project to one end side,
A magnetic material (1
4 ') and a magnet (13' provided with a magnetic guide space (15 ') which is provided along the fastening direction and magnetically restrains the trajectory of the magnetic body (14') with the magnetic body (14 ') interposed therebetween. ') And the magnetic guide mechanism (13, 1
4. The concrete formwork connecting device according to claim 1, which is configured as 4).