JP3120761B2 - Erecting device for opening and closing side walls of 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 an auxiliary device for erecting a side wall of a concrete form that can be opened and closed, and more particularly, to reducing the operation force for closing the side wall when assembling a mold and reducing the impact of opening the side wall. The present invention relates to an auxiliary device for raising an opening / closing side wall of a concrete form.

[0002]

SUMMARY OF THE INVENTION Concrete forms are
As shown in FIGS. 9 and 10, a base 32 and an opening / closing side wall 34 rotatably provided on a horizontal support shaft 33 of the base 32 are provided. The opening / closing side wall 34 is turned around the support shaft 33 to be erected to form a mold having a predetermined shape, and then concrete is poured and hardened, and then the opening / closing side wall 34 is supported. The mold is opened around the shaft 33 by rotating in the opposite direction to the above-mentioned closing direction and tilting to open the mold, and the concrete molded body is taken out.

[0003] In such a concrete formwork 31, the opening / closing side wall 34 must be erected against its weight when the mold is assembled. However, since the opening / closing side wall 34 is heavy, the opening / closing side wall 34 is heavy.
Requires a lot of power to stand up. This problem,
This is even more pronounced for large formwork.

For this reason, one end is connected to the open / close side wall 34 and the other end is attached to the base 32.
The spring 33 is inserted into the support shaft 33 of the opening / closing side wall 34 so that the biasing force of the spring 35 acts in the rising direction of the opening / closing side wall 34 to reduce the operation force when the opening / closing side wall 34 is raised. Has been done.

However, in the conventional device for raising the opening / closing side wall 34, when the opening / closing side wall 34 rotates around the support shaft 33, the contact portions between the ends of the mainspring spring 35 and the opening / closing side wall 34 and the base 32 slide. And the spring force applied to both ends of the mainspring 35 tilts the mainspring 35 with respect to the support shaft 33 so that the support shaft 33 and the inner surface of the mainspring 35 come into contact with each other.
When the spring rotates, the contact portion between the mainspring spring 35 and the support shaft 33 slides, so that the resilience of the mainspring spring 35 is reduced by the frictional force of these sliding portions, and the opening / closing side wall 34 is urged in the upright direction. There is a drawback that the force to perform becomes small. In addition, since the mainspring 35 biases the lower portion on the base end side near the rotation axis of the opening / closing side wall 34, it is difficult to sufficiently reduce the operating force when the opening / closing side wall 34 is raised. There was a problem.

For the purpose of solving such a problem, Japanese Utility Model Laid-Open No. 6-9910 discloses a side plate 43 as a side wall which is supported up and down by a horizontal support shaft 42 as shown in FIG. A lower extending portion 44 extending below the support shaft 42 is provided. One end or an intermediate portion is inserted between the lower extending portion 44 and the base 41 through the through hole 48 of the bracket 47, and the other end is supported. A guide rod 46 is swingably mounted on a pin 45 parallel to the shaft 42, and a base 41 is provided between a bracket 47 attached to the lower surface of the base 41 and a flange 49 formed on the guide rod 46. There is disclosed a stand-up assisting device for a side plate of a concrete formwork in which a compression coil spring 50 for applying a compression reaction force to the lower extending portion 44 of the side plate 43 is inserted through the guide rod 46 and mounted.

[0007] However, in the device for assisting the standing of the side plate of the concrete form, the supporting shaft is opened and closed as the side plate 43 is opened and closed.
Since the position of the pin 45 fluctuates in the vertical direction with the fulcrum 42 as the fulcrum, the guide rod 46 is inserted and removed in an inclined state with respect to the through hole 48 of the bracket 47, so that the sliding between the through hole 48 and the guide rod 46 is performed. When the guide rod 46 is inclined with respect to the bracket 47, the compression coil spring 50 is also biased and compressed in an inclined state, so that the elastic force of the compression coil spring 50 is sufficiently reduced. There was a problem that it could not be demonstrated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made in consideration of the above problem. The elasticity of a spring more smoothly acts as an urging force in the direction in which the opening / closing side wall rises. An object of the present invention is to provide a standing assist device.

[0009]

According to the first aspect of the present invention, there is provided an auxiliary device for erecting an opening / closing side wall of a concrete form, wherein the concrete form is supported on a base by a horizontal support shaft so that the concrete form can be turned upside down. An upright assisting device for an opening / closing side wall, wherein a connecting portion is provided on the side wall to extend below a pivot portion by the support shaft, and one end of the connection portion is rotatable in the support shaft direction. A guide rod is provided, and the other end of the guide rod is provided on the lower side of the base with a guide hole which has an insertion hole in which the guide rod can freely move in the axial direction and is rotatable in the support shaft direction. was mounted, the said guide member and the compression coil spring exerting a compression reaction force between the connection portions inserted in the guide lever, front Symbol flange portion provided in the middle of the compression coil spring the guide lever guide The other end of the rod abuts on the guide member And mounted between the vignetting stopper member, the guide rod inserted through the guide lever capable idler for the insertion front Symbol guide member to a bracket provided on the base under the base side to the stopper member and a shaft member having a hole which is provided rotatably on the shaft direction, the shaft member
Has a notched surface with which the stopper member abuts.
And the substantially horizontal insertion surface facing the substantially vertical notch surface.
A hole is formed .

[0010] By adopting such a configuration, when the open / close side wall in the closed state is rotated and opened, the connection portion extends below the pivot portion, so that the open / close side wall is formed. The guide rod is moved toward the guide member side by being pressed by the connecting portion as the cam is inclined, and the compression coil spring is compressed. At this time, the guide rod rotates in the support shaft direction with the guide member as a fulcrum as the connecting portion moves up and down, and the guide member also rotates in the support shaft direction along with this, so that the insertion hole is always guided. Since the guide rod is directly opposed to the rod, the guide rod slides smoothly in the insertion hole. Then, the elastic force of the compression coil spring is transmitted as a force in the opposite direction, that is, in the direction of closing the opening / closing side wall, via the guide rod and the connection portion. As a result, the opening / closing side wall has a considerable weight and tends to open vigorously, but the momentum can be damped and the impact is reduced. Further, when the mold is assembled by closing the open / close side wall, the force of the worker when rotating the open / close side wall upward can be reduced by the elastic force of the compression coil spring. In particular, since the insertion hole and the guide rod face each other, the loss caused by sliding of the guide rod is small, so that the elastic force of the compression coil spring is efficiently transmitted to the open / close side wall via the guide rod and the connection portion. Can be done . Ma
Further, since the compression coil spring is always uniformly compressed by the stopper member and the flange member provided on the stopper rod, the elasticity of the compression coil spring can be exhibited well .
Also, as the guide rod rotates in the support shaft direction, the shaft member also rotates in the support shaft direction, so that the insertion hole always faces the guide rod. It can be inserted and removed smoothly . In particular, the notch in the shaft member
Surface, and an insertion hole is formed facing this notched surface.
Which do Runode, the stopper member is this even the shaft member is rotated
Always perpendicular to the insertion hole by contacting the notch
The compression coil spring is located between the flange and the stopper.
The compression coil is always compressed uniformly in the radial direction.
The spring presses the flange evenly, so the compression coil spring rebounds
The force is exerted well.

[0011] The upright auxiliary device for opening and closing a side wall of a concrete form according to a second aspect of the present invention includes a link member having the connecting portion attached to a lower end of the opening and closing side wall, and a pressing member connected to the link member. One end of the pressing member is rotatably connected to one end of the guide rod in the support shaft direction, and the other end of the pressing member is rotatably fixed to the base. is there. For this reason, when the closed opening / closing side wall is rotated and opened, the pressing member of the connection portion is pushed down by the link member, but this pressing member is fixed to the base so as to be rotatable. Therefore, this downward movement is transmitted to the guide rod mainly as a lateral movement by the pressing member, and the guide rod moves to the guide member side,
The compression coil spring is compressed. The resilient force of the compression coil spring moves the open / close side wall in the opposite direction via the guide rod and the connection portion,
That is, it can be transmitted as a force in the closing direction.
Further, when the mold is assembled by closing the open / close side wall, the force of the worker when rotating the open / close side wall upward can be reduced by the elastic force of the compression coil spring. In particular, by adopting the configuration as described above, the inclination of the guide rod can be minimized, the compression coil spring can be smoothly compressed, and the elastic force of the compression coil spring is efficiently applied to the open / close side wall. Can be transmitted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3, reference numeral 1 denotes a concrete form. The concrete form 1 includes a pair of opposing open / close side walls 2, fixed side walls (not shown), a bottom plate 3, and a base continuous with a lower portion of the bottom plate 3. The table 4 is provided. Such an opening / closing side wall 2 is provided with a pivoting portion 5 at the lower end thereof.
1A, a mold having a predetermined shape is formed by the openable and closable side wall 2, the fixed side wall, and the bottom plate 3 in an upright state when the mold is assembled. In the concrete form 1 as described above, a connecting portion 6 extending below the pivotal connection portion 5A by the support shaft 5 is fixed below the opening / closing side wall 2, and a distal end of the connecting portion 6 is provided. One end of a guide rod 7 is pivotally connected to the portion 6A by a pin 8 so as to be freely rotatable. On the other hand, on the lower side of the base 4 has a bracket 9 is projected, the same direction the shaft member 10 and the supporting shaft 5 on the inside of the bracket 9 having a truncated face 10A on one side as shown in FIG. 3 An insertion hole 11 having a diameter larger than the diameter of the guide rod 7 is formed facing the cutout surface 10A of the shaft member 10. The bracket 9 and the shaft member 10 constitute a guide member. A flange 12 having a concave receiving portion 12A is formed at one end of the guide rod 7, and one end of the guide rod 7 is housed in the concave receiving portion 12A of the flange 12 from the other end. Compression coil spring
13, a stopper member having a concave receiving portion 14A
14 and insert the tip of the guide rod 7 into the above-described insertion hole.
It is mounted on 11. When the guide rod 7 passes through the insertion hole 11, the distance between the stopper member 14 and the flange 12 is a slightly compressed length of the compression coil spring 13 or a position where the extension is limited. Is formed.

The operation of the above configuration will be described. First, the assembled state will be described. In the assembled state, as shown in FIG. 1, the opening / closing side wall 2 is in an upright state, and the tip 6A of the connecting portion 6 is located below the support shaft 5 and It is in the position of the retreat limit (left side in FIG. 1). At this time, the guide rod 7 is substantially horizontal, the notch surface 10A of the shaft member 10 is vertical, and the insertion hole 11 is also substantially horizontal.
Is substantially perpendicular to the notch surface 10A. The compression coil spring 13 is slightly compressed by the flange 12.

In such a state, when the opening / closing side wall 2 is rotated so as to be inclined when the mold is opened as shown in FIG. 4, the distal end 6A of the connecting portion 6 has an arc-shaped locus about the support shaft 5. To the bracket 9 side (right side in the figure)
Go to Then, the guide rod 7 moves forward with respect to the bracket 9 and penetrates deeper into the insertion hole 11, and the interval between the flange 12 and the stopper member 14 is reduced, so that the compression coil spring 13
Is compressed. Then, the resilient force F of the compression coil spring 13 is transmitted to the opening / closing side wall 2 via the guide rod 7 and the connecting portion 6 on the reverse path. The resilient force F is increased as the open / close side wall 2 further rotates and the open / close side wall 2 approaches the horizontal side.
However, it is possible to suppress the vigorous opening due to its own weight, and to greatly reduce the impact at the time of opening. When the mold opening is completed as shown in FIG.
Is in the state of maximum compression, and the maximum elastic force F is transmitted to the connection portion 6 by the compression coil spring 13. In the mold opening operation as described above, the position of the distal end 6A of the connecting portion 6 is displaced in the vertical direction, so that the guide rod 7
As shown in FIG. 4, the vehicle moves forward while being inclined upward to the right from the horizontal state. However, the shaft member 10 is rotatably attached to the bracket 9, and the shaft member 10 has a through hole 11 formed in the shaft member 10. Since the other end of the guide rod 7 is mounted,
Since the shaft member 10 rotates according to the inclination of the guide rod 7, the guide rod 7 and the insertion hole 11 always face each other, so that the guide rod 7 can always smoothly insert and remove the insertion hole 11. It has become. Particularly, in the present embodiment, a notch surface 10A is formed on one side of the shaft member 10, and this notch surface 10A is formed.
Since the insertion hole 11 is formed facing A, even if the shaft member 10 rotates, the stopper member 14 is always perpendicular to the insertion hole 11 by abutting on the cutout surface 10A. 13 is always compressed uniformly in the radial direction between the flange portion 12 and the stopper member 14, and the compression coil spring 13 uniformly presses the flange portion 12, so that the resilient force F of the compression coil spring 13 is exerted well. It is supposed to be.

When the mold is assembled, the opened side wall 2 is turned to the state shown in FIG. 1 as shown by the two-dot chain line arrow in FIG. 5, but at this time, as described above, the compression coil spring 13 is maximized. In a compressed state, the resilient force F of the compression coil spring 13 is transmitted to the open / close side wall 2 via the guide rod 7 as shown by the arrow in FIG. Is done. In particular, as described above, the shaft member 10 is rotatably mounted on the bracket 9 and the other end of the guide rod 7 is mounted in the insertion hole 11 formed in the shaft member 10. 7, the loss of elastic force of the compression coil spring 13 due to the sliding of the compression coil spring 13 is small.
Is transmitted to the opening / closing side wall 2 efficiently.

As described in detail above, the auxiliary device for raising the opening / closing side wall 2 of the concrete form 1 of the first embodiment comprises a concrete form supported by a horizontal support shaft 5 so as to be able to move up and down on a base 4. A connecting portion 6 is provided on the opening / closing side wall 2 so as to extend below a pivot portion 5A by the support shaft 5, and a guide rod 7 is rotatably provided in a tip end portion 6A of the connection portion 6 in the direction of the support shaft 5. And the other end of the guide rod 7 is connected to the base 4
Is mounted on an insertion hole 11 of a shaft member 10 which is rotatably mounted in the direction of the support shaft 5 on a bracket 9 provided on the lower side of the bracket 9, and a compressive reaction force is applied between the bracket 9 and the connection portion 6. The compression coil spring 13 to be operated is inserted through the guide rod 7. Therefore, when the open / close side wall 2 in the closed state is rotated and opened, the compression coil spring 13 is compressed, and the elastic force F of the compression coil spring 13 causes the open / close side wall 2 to move through the guide rod 7 and the connection portion 6. It is transmitted as a force in the closing direction. As a result, it is possible to attenuate the opening / closing side wall 2 from vigorously opening, and the impact thereof is reduced. Further, when the open / close side wall 2 is closed and assembled, the force of the worker when the open / close side wall 2 is turned upward can be reduced by the elastic force of the compression coil spring 13. In particular, since the shaft member 10 rotates in accordance with the inclination of the guide rod 7, the insertion hole 11 and the guide rod 7 face each other, and the loss associated with sliding of the guide rod 7 is small. The elastic force can be efficiently transmitted to the opening / closing side wall 2 via the guide rod 7 and the connecting portion 6. Further, the compression coil spring 13 is mounted between a flange 12 provided in the middle of the guide rod 7 and a stopper member 14 provided at the other end of the guide rod 7 in contact with the shaft member 10. Therefore, the compression coil spring 13 is connected to the stopper member 14 provided on the stopper rod 7.
The compression coil spring 13 presses the flange 12 evenly.
Thirteen resilient forces F are exhibited efficiently.

Next, a second embodiment of the present invention will be described with reference to FIGS. The opening / closing side wall raising assist device of the second embodiment has basically the same configuration as that of the above-described first embodiment. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, as shown in FIGS. 6 and 7, the connecting portion 6 is rotatably mounted on a protruding portion 21 protruding from the lower side surface of the opening / closing side wall 2 and fixed to a tip 21A of the protruding portion 21. And a substantially L-shaped pressing member 23 rotatably connected to the link member 22 at a bent portion 23A. One end of the pressing member 23 Numeral 24 is pivotally attached to one end of the guide rod 7 so as to be rotatable in the direction of the support shaft 5, and the other end 25 of the pressing member 23 is turned to a mounting member 26 fixed to the side surface of the base 4. It is pivoted freely. In the present embodiment, the flange 12 and the stopper member 14 are formed with convex receiving portions 12B and 14B instead of the concave receiving portions 12A and 14A.
The compression coil spring 13 is mounted by fitting the outer periphery of the compression coil springs 13B and 14B. 27, 28, 29 and 30 are pivots.

The operation of the above configuration will be described. In the state where the mold is assembled, as shown in FIG.
Is vertically erected, and one end 24 of the pressing member 23 which is the tip of the connecting portion 6 is located below the support shaft 5 and is at the receding limit (left side in the drawing) with respect to the bracket 9. Position. At this time, the guide rod 7 is slightly inclined to the lower right in the figure, the cutout surface 10A of the shaft member 10 is slightly upward, and the insertion hole 11 is also slightly inclined corresponding to the guide rod 7. The stopper member 14 contacts the notch surface 10A and is slightly upward. The compression coil spring 13 is slightly compressed by the flange 12.

In such a state, when the mold opening is performed by rotating the opening / closing side wall 2 so as to be inclined as shown in FIG. 8, the tip 21A of the projecting portion 21 has an arc shape with the support shaft 5 as a center. The link member 22 pushes down the bent portion 23A of the pressing member 23 as it descends along the locus. Then, the pressing member 23 is substantially L-shaped, and the other end 25 is
By pivoting around the other end 25, one end 24 of the pressing member 23 advances with respect to the bracket 9, and the guide rod 7 is further deeply inserted into the insertion hole 11. As a result, the compression coil spring 13 is compressed because the gap between the flange 12 and the stopper member 14 is reduced. Then, the resilient force F of the compression coil spring 13 is transmitted to the opening / closing side wall 2 via the guide rod 7, the pressing member 23, the link member 22, and the protruding portion 21 along the reverse path. This resilience is based on the open / close side wall 2
The compression coil spring 13 is compressed and becomes larger as the opening / closing side wall 2 approaches the horizontal side further, so that the opening / closing side wall 2 is prevented from vigorously opening due to its own weight, and the impact at the time of opening is greatly reduced. Can be eased. And the shaft member 10 is rotatably attached to the bracket 9,
Since the other end of the guide rod 7 is mounted in the insertion hole 11 formed in the shaft member 10, the shaft member 10 rotates according to the inclination of the guide rod 7, and the guide rod 7 and the insertion hole Since the guide rod 7 always faces directly, the guide rod 7 can always smoothly insert and remove the insertion hole 11. When the mold is assembled, the opened side wall 2 is rotated to the state shown in FIG. 6 as indicated by the two-dot chain line arrow in FIG. 8, but at this time, the compression coil spring 13 is compressed to the maximum as described above. In this state, the elastic force F of the compression coil spring 13 is transmitted to the opening / closing side wall 2 via the guide rod 7 as shown by the arrow in FIG. 8, so that the operating force is greatly reduced. Particularly, in this embodiment, since the link member 22 and the pressing member 23 are used, the vertical inclination of the guide rod 7 can be suppressed to a minimum, and the compression coil spring 13 can be compressed smoothly. At the same time, the elastic force F of the compression coil spring 13 can be efficiently transmitted to the opening / closing side wall 2.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the second embodiment, the link member 22 and the pressing member 23 are used, but only one of them may be used in some cases, and the shapes of these members can be appropriately changed.

[0021]

According to the first aspect of the present invention, there is provided an apparatus for raising and lowering an opening / closing side wall of a concrete formwork which is pivotally supported on a base by a horizontal support shaft. An apparatus, wherein the side wall is provided with a connecting portion extending below a pivoted portion by the support shaft,
A guide rod is provided at the connection portion so that one end thereof is rotatable in the support shaft direction, and the other end of the guide rod is provided below the base so that the guide rod can freely move in the axial direction. was mounted on the rotatable guide member on the support shaft direction and having a bore, a compression coil spring exerting a compression reaction force between the guide member and the connecting portion is inserted into the guide rod, before Symbol compression and mounted a coil spring between the guide said the flange portion provided in the middle of the rod guide lever and the guide member to the stopper member provided in contact with the other end of the stopper portion
Said guide rod is inserted through the wood, freely before Symbol guide member rotates the shaft member in which the guide rod to the bracket provided having a freely movable the insertion hole in the base under the base side to the support shaft direction The shaft member is provided with the stopper member.
Has a notched surface with which the
Since the insertion hole which is substantially horizontal is formed so as to face the lacking surface, the operation force when assembling the mold by erection of the opening / closing side wall can be reduced . Also, the momentum of when the opening side wall is opened can be attenuated, it is possible to reduce the impact. In addition, since the compression coil spring is always uniformly compressed by the stopper member and the flange member provided on the stopper rod, the elasticity of the compression coil spring can be sufficiently exhibited . Et al is, the guide rod is the shaft member pivots in pivot direction with the pivot support shaft direction, wherein the insertion hole guide lever for thereby directly facing against constantly guide lever is insertion hole The inside can be inserted and removed smoothly .

[0022] According to a second aspect of the present invention, there is provided an auxiliary device for erecting an opening / closing side wall of a concrete formwork, comprising: a link member having the connecting portion attached to a lower end of the opening / closing side wall; and a pressing member connected to the link member. One end of the pressing member is rotatably connected to one end of the guide rod in the support shaft direction, and the other end of the pressing member is rotatably fixed to the base. Therefore, it is possible to further reduce the operation force when assembling the mold with the opening and closing side walls erected. Further, the moment when the opening / closing side wall is opened can be damped, and the impact can be further reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an auxiliary device for raising an opening / closing side wall of a concrete formwork according to a first embodiment of the present invention.

FIG. 2 is a side view showing the auxiliary device for raising the open / close side wall of the concrete formwork of the embodiment.

FIG. 3 is an enlarged cross-sectional view showing an upright auxiliary device for opening and closing a side wall of the concrete formwork of the embodiment.

FIG. 4 is an enlarged sectional view showing a state in which the opening / closing side wall of the upright auxiliary device for opening / closing the side wall of the concrete formwork of the embodiment is partially opened.

FIG. 5 is an enlarged cross-sectional view illustrating a mold opening state of the upright auxiliary device for opening and closing the side wall of the concrete formwork of the embodiment.

FIG. 6 is a cross-sectional view illustrating an auxiliary device for raising an opening / closing side wall of a concrete formwork according to a second embodiment of the present invention.

FIG. 7 is a partially enlarged side view showing an upright auxiliary device for opening and closing the side wall of the concrete formwork of the embodiment.

FIG. 8 is an enlarged cross-sectional view of the concrete formwork of the embodiment, showing the mold opening state of the opening / closing side wall assisting device.

FIG. 9 is a front view showing a conventional auxiliary device for raising an opening / closing side wall of a concrete formwork.

FIG. 10 is a side view showing a conventional standing auxiliary device for opening and closing a side wall of a concrete formwork.

FIG. 11 is a front view showing another conventional standing auxiliary device for opening and closing a side wall of a concrete formwork.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete formwork 2 Opening / closing side wall 4 Base 5 Support shaft 6 Connection part 7 Guide rod 9 Bracket 10 Shaft member 10A Notch surface 11 Insertion hole 12 Flange part 13 Compression coil spring 14 Stopper member 21 Projection part (connection part) 22 Link member ( Connection part) 23 Pressing member (Connection part)

Continuation of the front page (56) References Japanese Utility Model Hei 6-9910 (JP, U) Registered utility model 3031432 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B ^7/ 00- 7/46

Claims (2)

(57) [Claims] 1. An auxiliary device for raising an opening / closing side wall of a concrete form supported on a base by a horizontal support shaft so as to be able to be turned up and down, wherein the side wall is provided at a position lower than a pivoted portion by the support shaft. A connecting portion extending to the connecting portion, a guide rod is provided at one end of the connecting portion so as to be rotatable in the support shaft direction, and the other end of the guide rod is provided below the base. A compression coil spring that has a through hole in which the guide rod can freely move in the axial direction and is mounted on a guide member that is rotatable in the support shaft direction and that applies a compression reaction force between the guide member and the connection portion. mounted between the guide rod to be inserted, before Symbol said compression coil spring and the guide flange portion provided in the middle of the rod guide lever and the guide member to the stopper member provided in contact with the other end of the And the stopper member
The de rod inserted, which pre Symbol guide member and the guide rod to the bracket provided on the base under the base side is provided rotatably a shaft member having a freely movable the insertion hole in the support shaft direction The shaft member is a cutting member with which the stopper member abuts.
Having a notched surface and facing the substantially vertical notched surface
An upright support device for an opening / closing side wall of a concrete formwork, wherein the substantially horizontal insertion hole is formed . 2. The connecting portion has a link member attached to a lower end of an opening and closing side wall, and a pressing member connected to the link member, and one end of the pressing member is connected to one end of the guide rod by the support shaft. upright of the opening and closing side wall of the concrete form of claim 1, wherein said the other end of the pressing member is fixed rotatably to the base along with being connected rotatably direction Auxiliary equipment.