JPH0253563B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joint frame fastener, and particularly to a joint frame fastener for concrete construction joints.

[Conventional technology]

As is well known, in concrete pavement work for road surfaces or the ground, it is customary to make construction joints at the end of the paving work after one day's paving work is completed. By the way, as a means of applying this construction joint,
Conventionally, joint plates were set by driving pins into the roadbed at the construction end and fixing the joint plates through gaskets.

[Problem to be solved by the invention]

However, such conventional methods have the following problems.

(b) When the roadbed is hard or when elevated work is to be carried out on top of an existing concrete base, holes are drilled into the roadbed for pins to be driven in, and the joint plates are fixed by driving the pins. It took a lot of time. Furthermore, it takes a lot of effort and time to set the fasteners, and during this time there is a loss in that the paving machines, such as the finishers, are stopped and idle.

(b) Because pins were set, the paving machine had to stop in front of the pins, and the parts that contacted the joint plates had to be manually laid with concrete, which was inefficient. In addition, it was necessary to remove the pins before resuming the paving work, and subsequent processing also took time.

[Means for solving problems]

The present invention solves the above-mentioned problems, and provides a joint frame fastener that is effective in setting joint plates in a short time with a simple configuration and operation, and increasing the amount of work per day. The purpose is to

The specific measures taken by this invention are characterized by utilizing the side formwork laid for paving work, and attaching and detaching joint frame fasteners having the following structure to the side formwork. Therefore, the joint construction can be performed by setting the joint frame fasteners and standing the joint plate material in contact with the set joint frame fasteners.

First, a joint plate frame support and a pair of formwork hanging bodies were provided. The joint plate frame support is configured so that the span can be adjusted according to the paving width at the concrete paving site. The formwork assembly was constructed so that its cross-sectional shape was key-shaped and had a horizontal fitting groove that fit into the upper edge of the side formwork that was also laid at the concrete paving site. Next, the formwork hanging bodies having the horizontal fitting grooves are fixed symmetrically to both ends of the joint plate frame support with the horizontal fitting grooves facing downward, thereby forming joint frame fasteners. be.

[Effect]

Since the joint frame stopper of the present invention is constructed as described above, the horizontal fitting grooves of the formwork hooks symmetrically fixed to both ends of the joint plate frame support are placed on both sides of the paving site. It can be set so as to engage the upper end edge of the installed concrete form, and then the joint plate material can be erected and fixed on the roadbed so as to be in contact with the joint plate frame support. In other words, unlike conventional methods, there is no need to drive pins into the roadbed, and it is easy to set on the roadbed.Furthermore, paving machines such as finishers can be used close to the joint boundaries, and additional manual work is not required. do not need.

〔Example〕

Next, the present invention will be explained based on the drawings of an example in which the present invention is utilized in the construction of a cement-concrete paved road.
Figure 1 is a plan view showing the embodiment, Figure 2 is a front view,
FIG. 3 is a sectional view taken along the line AA in FIG. 1.

As already explained, the joint frame stopper 1 has a pair of formwork hooks 3,
3' is fixed and constructed integrally.

First, the joint plate frame support 2 is formed of a square pipe as shown in FIG. 3, and its length is configured so that it can be arranged according to the paving width of the paving site.

Next, the pair of formwork hooking bodies 3, 3' having horizontal fitting grooves that fit into the upper edges of the side forms 5, 5 installed on both sides of the paving site form horizontal fitting grooves. Therefore, as shown in FIG. 2, there is a main body part 3a which is vertical in the front, a hooking part 3b horizontally disposed on the upper end of the main body part 3a, and an outer edge hanging down from the outer end of the hooking part 3b. It is formed into a key shape with a substantially L-shaped cross section consisting of a portion 3c. The formwork hanging bodies 3, 3' are fixed to both ends of the joint board frame support 2, with the outer edges 3c, 3c facing outward, and the main body parts 3a, 3a facing each other. be. In other words, they are fixed symmetrically. In the drawing, reference numeral 4 indicates a roadbed, 5 indicates a side formwork installed on both sides of the paving site, 6 indicates a support base for running a paving machine, and 7 indicates a rail. Said side formwork 5
As shown in FIG. 2, the wall 5a and the fixed portion 5b are formed into a substantially L-shaped cross section, and are disposed at both ends of the paved road, facing the left and right walls 5a.
This is a so-called commonly used formwork set in the usual manner.

Next, in order to set the joint frame fasteners 1 to the side forms 5, 5, the engaging portions 3b, 3b of the left and right formwork hooks 3, 3', that is, the horizontal fitting grooves, are inserted into the side forms 5. The upper end of the wall 5a is engaged with the main body 3a.
The wall 5a is sandwiched between the wall 5a and the outer edge 3c. That is, it is set in such a way that it is fitted into the side forms 5, 5 on both the left and right sides from above.

Next, an example of use of the joint frame fastener according to the present invention will be explained.

In FIG. 1, a portion A indicates an area where concrete is being poured, and a portion B indicates an area where concrete is being poured subsequently. now,
As today's concrete pouring is finished, we will set the construction joints. First, the engaging portions 3b, 3b of the joint frame stopper 1 of the present invention are engaged with the construction part from above in such a manner that they fit into the walls 5a of the formwork on both sides, that is, the upper edges, which have already been installed. let

Thereby, the joint frame stopper 1 is fixed to the side formworks 5, 5 installed on both sides of the paving site without any movement.

Next, a lower joint frame board 8 serving as a joint board material is erected on the roadbed in the mid-casting region A in contact with the joint board frame support 2 of the joint frame stopper 1. Further, an upper joint board frame 9 is placed on top of the lower joint board frame 8 that has been erected,
A plurality of slip bars 10, 10, . . ., which serve as joint joint members, are inserted and set between both joint plate frames 8, 9. That is, they are arranged on the joint plate frames 8 and 9 at a predetermined interval in the longitudinal direction.

After that, cement concrete is poured in close proximity to the joint board frames 8 and 9, and the slip bar 10...
The surrounding area is manually leveled and a surface finishing machine is moved onto the rail 7 to finish it flat.

With this, the joint plate frames 8 and 9 are attached to the joint frame stopper 1.
The position is fixed and does not move.

As can be understood from the above explanation, the joint frame stopper 1 according to the present invention can be set by simply engaging the upper edges of both side formworks installed on both sides of the paving site. Attachment and detachment operations for setting plate materials are extremely easy. Therefore, compared to conventional methods, it can be set in a shorter time, and more time can be effectively used for paving work. This makes it possible to increase the amount of work per day.

In the embodiment, the joint plate frames 8 and 9 are divided into two plates, but of course they may be made of one plate.

FIG. 4 shows an embodiment in which the joint plate frame support 2 is configured to be expandable and contractible. As already explained, in the embodiment, the joint plate frame support 2 is formed of a square pipe.
Therefore, in this embodiment, the square pipe is divided into two parts at the longitudinal center, and a relay body 2a is placed between the two opposing parts.
The relay body 2a is slidably fitted into the pipe holes 2b, 2b' of both joint plate frame supports 2, 2', and is configured to be expandable and contractible. Note that the reference numeral 2b in the drawings is a pin hole.

As described above, since the span of the joint board frame support 2 is configured to be freely adjustable, when the opposing distances between the formworks 5 and 5 on both sides are different, that is, when the width of paving work is different, the relay body 2a is The expansion and contraction of the joint plate frame supports 2, 2' on both sides can be adjusted through the joint plate frame supports 2, 2'. That is, the single joint plate frame support 2 can be used for various construction sites with different paving widths.
When adjusting the span, fix by fitting pins into the respective pin holes 2d, 2d of the relay body 2a and joint plate frame supports 2, 2', or by fixing with the fixing screws 2e.
The structure is such that it can be carried out depending on whether it is used or not.

Further, the reference numeral 2c shown in FIG. 5 is a spacer. This is a member for replenishing the amount that has become thinner because the relay body 2a is fitted into the pipe hole 2d of the joint plate frame support 2.

Incidentally, as shown in FIG. 4, it is also possible to omit the right side joint plate frame support 2' and attach a formwork hooking body 3 to the right end of the relay body 2a.

FIG. 6 shows the joint plate frame support 2 as in the previous embodiment.
FIG. 4 is a plan view showing another embodiment for making the span adjustable.

The joint plate frame supports 2, 2' are constructed of square pipes as described above. The other small-diameter support 2' is slidably inserted into one of the tube holes 2b, so that its overall length can be adjusted, and is fixed with a fixing screw 2e. Arms 2f are attached to both ends of the joint plate frame supports 2, 2'.
It has a configuration in which formwork hooking bodies 3, 3 are respectively attached via 2f.

The arms 2f, 2f are the joint board frame support 2,
2', with the tip facing toward the subsequent pouring block B, and the formwork hooking bodies 3, 3 are attached to the arm 2'.
It is attached to the outer side of the tip of f and 2f. Therefore,
The formwork hanging bodies 3, 3 move away from the joint board frame supports 2, 2', and as a result, a machine such as a surface finisher runs over the rails 7, 7 to a position where it straddles the joint board frame supports 2. can proceed. the result,
The formwork hanging assembly 3 does not interfere with finishing work, etc.

It should be noted that the present invention is not limited to the above-mentioned configuration, and it goes without saying that the design can be changed as appropriate. For example, a diagonal reinforcing arm may be provided between the joint board frame support 2 and the formwork hanging assembly 3.

Further, the joint plate frame support 2 and the formwork hanging assembly 3 can be attached and detached by screws or the like, or can be pivoted so as to be rotatable.

〔effect〕

Since the present invention is configured as described above, it has the following excellent effects.

(b) The structure is extremely simple, making it easy to operate. Production costs are also low.

(b) Setting can be done by simply hooking the formwork assembly to the formworks on both sides, that is, just by fitting them together, and the installation work can be completed in a short amount of time by one person. Therefore, the setting work that conventionally required several people and a long time is significantly shortened, paving costs can be reduced, and there is less time for the machine to be idle, which allows for a considerable increase in the amount of pouring per day. can be achieved.

[Brief explanation of drawings]

The drawings relate to the present invention, and FIG. 1 is a plan view of a joint frame stopper, showing a first embodiment, FIG. 2 is a front view, FIG. 3 is a sectional view taken along line A-A in FIG. 1, and FIG. FIG. 5 is a plan view showing the second embodiment, FIG. 5 is a sectional view taken along line BB in FIG. 4, and FIG. 6 is a plan view showing the third embodiment. 1... Joint frame stopper, 2, 2'... Joint plate frame support, 2a... Relay body, 2b, 2b'... Pipe hole, 2c
... Spacer, 2d ... Pin hole, 2e ... Fixing screw, 2f ... Arm, 3, 3' ... Formwork hanging body,
3a... Main body part, 3b... Engagement part, 3c... Outer edge part, 4... Roadbed, 5... Side formwork, 5a... Wall body,
5b... Fixed part, 6... Rail support stand, 7... Rail, 8, 9... Joint plate frame, 10... Slip bar, A... Area in the middle of pouring, B... Subsequent pouring area.

Claims (1)

[Scope of Claims] 1. It has a joint plate frame support and a pair of formwork hanging bodies, and the joint plate frame support has a span that can be adjusted according to the paving width at the concrete paving site, The formwork hanging assembly has a horizontal fitting groove that fits into the upper edge of the side formwork that is also installed at the concrete paving site, and the horizontal fitting grooves are provided at both ends of the joint board frame support, respectively. A joint frame fastener characterized in that the joint frame fasteners are fixed symmetrically with the ends facing downward.