JPH0221205Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing device for plug collars used by concrete product manufacturers in manufacturing track slabs.

Conventionally, as an embedded plug collar fixing device for a track slab, a shaft rod is attached and detached from a base together with an embedded plug collar, and this device is known from Japanese Patent Application Laid-Open No. 53-36023. A guide tube is provided corresponding to the installation position of the embedded plug collar, an elevating tube that is pushed up by a cam and pulled down by a spring is disposed inside the guide tube, and a horizontal hole is provided around the elevating tube. A ball is installed in the horizontal hole, which escapes into the relief groove provided in the guide tube when the elevator tube is pushed up, and which engages with the clamping head of the stop shaft of the embedded plug collar when the elevator tube is lowered to lower it. Since the embedded stopper collar can be fastened with a single touch without the operator having to enter the underframe, it is not only possible to significantly improve the molding efficiency of track slabs. Since the fastening can be performed by operating a handle outside the underframe, the work is easy and there is no danger at all. In addition, this device can loosen the fastening of the embedded plug collar when steam curing the molded slab, so the collar will not be deformed by the curing heat, making it the industry's best choice as a fastening device for embedded plug collars for track slabs. can make an extremely large contribution. It had a unique effect. However, in this case, a guide tube with a relief groove is provided on the back side of the formwork, and an elevating tube that is pushed up by a cam and pulled down by a spring is arranged between the guide tubes, and the circumferential surface of the elevating tube is It has a complicated structure in which a hole is provided to accommodate the ball, which is released into the relief groove of the guide tube when the elevator tube is raised, and then engaged with the clamp head of the stop shaft when the tube is lowered, so the manufacturing cost is high, but the price is low. It could not be offered on the market, and it also had the problem of being prone to breakdowns due to wear and tear on parts due to its structure.

The present invention is a track slab that eliminates the above-mentioned drawbacks of the conventional method by elevating and lowering the wedge by engaging and disengaging the wedge body with the pressurizing stage of the shaft rod, which can be freely inserted into and removed from the supporting cylinder of the base. The purpose of the present invention is to provide a fixing device for an implantable stopper collar.

Next, an example of the implementation of the device related to the present invention will be explained based on the drawings.

In FIGS. 1 to 5, reference numeral 1 denotes a base of a formwork A, and a support cylinder 3 is vertically installed at the position where the plug collar 2 is to be set. 4 is a shaft rod that can be freely inserted into and removed from the support tube 3, and the upper end is marked with the number 3 in the drawing.
A T-shaped head 5 as shown in the figure is provided, and a pressurizing step 6 is formed at the lower end by drilling as shown in Figs. 3 and 4 or by step machining as shown in Fig. 5, and the whole is integrated. Although it may be formed by a regular steel rod, the upper part b and the lower part c are formed separately, and both ends of the coil spring 7 are inserted into the spiral grooves d and d provided at each end, and the shaft rod is 4 may be joined by a spring 7 so that it can be expanded and deflected. Reference numeral 8 denotes a continuous rod that is supported by the formwork A so as to move horizontally along the shaft rod 4, and is shaped like a plate as shown in FIG. is provided. Reference numeral 10 denotes a wedge body attached to the connecting rod 8, and when the pressurizing stage 6 of the shaft rod 4 is formed by drilling as shown in Figures 3 and 4 of the drawings, it is shaped like a plate as shown in the drawings. , When forming the pressure stage 6 by step processing as shown in FIGS. 5 and 6,
As shown in the figure, it is formed into a U-shape. Reference numeral 11 denotes an operating lever for the above-mentioned connecting rod 8, which is attached to a shaft 12 on the above-mentioned formwork A, and the connecting rod 8 is connected to the lower end of the shaft 12.
Reference numeral 13 denotes a housing provided at the upper end of the embedded plug collar 2, and the T-shaped head 5 of the shaft rod 4 described above is placed inside the housing.
A locking part 15 of the T-head 5 is provided on both sides of the hole 14 and has a recess 15' orthogonal to the hole 14 in the center, and
When the T-shaped head 5 is rotated 90 degrees within the recess 15, the T-shaped head 5 falls into the recess 15 and becomes stable. 1
Reference numeral 6 denotes a rotary plate loosely fitted to the lower end of the upper part b of the shaft rod 4, and the upper end of the coil spring 17, one end of which is fixed to the rotary plate 16, is fixed to the T-shaped head 5 of the shaft rod 4. A projection 18 is provided on the shaft rod 4,
Two pins 19 and 19' are attached to the rotary plate 16 with a phase difference of 90 degrees between these protrusions 18, and the rotary plate 16
When the shaft 4 is inserted into the socket collar 2 by twisting the spring 17 by the rotation of
The T-shaped head 5 is rotated by the restoring force of the spring 17 to automatically lock the T-shaped head 5 to the locking portion 15.

In the brace constructed as described above, when the upper part b and the lower part c are joined by the spring 7 and the shaft rod 4 is used, which can be extended and deflected, the embedded stopper collar 2 is fitted. The shaft rod 4 is inserted into the support tube 3 of the base 1, and the connecting rod 8 is moved to the position shown in the figure 8 by the operation lever 11.
When the wedge body 10 is moved in the direction of the arrow in the figure, the wedge body 10 fixed to the protrusion 9 of the connecting rod 8 moves from the position shown by the chain line to the position shown by the solid line in the figure, and presses the pressure stage 6 on the shaft rod 4. to lower the shaft 4 and press the locking portion 15 of the embedded plug collar 2 with the T-shaped head 5. Therefore, the operation of securely pressing and fixing the embedded plug collar 2 to the base 1 can be performed with a single touch.

Once the embedded plug collar 2 is fixed in this way, concrete is poured into the formwork A, and a track slab with the embedded plug collar 2 embedded in the predetermined position is manufactured, so when this slab is demolded, If the connecting rod 8 is moved in the opposite direction to the above using the operating lever 11,
The wedge body 10 moves from the position shown by the solid line in FIG.
Remove wedge body 10 from. Therefore, if the completed track slab is lifted out of the formwork A in this state, the track slab can be easily removed from the formwork A by pulling out the shaft rod 4 from the support cylinder 3.

In the device related to the present invention, when the connecting rod is moved to one side outside the formwork, the wedge advances toward the pressure stage of the shaft rod, presses the pressure stage, and presses and fixes the embedded plug to the base. When the rod is moved to the other side, the wedge body disengages from the pressure stage of the shaft rod and releases the fixation of the embedded plug, making it possible to attach and remove the embedded plug collar easily and reliably. The collar can be positioned accurately and concrete slag leakage can be prevented.

In particular, this device has a structure in which a wedge body is attached to a connecting rod that is moved forward and backward by an operating lever, and a pressurizing stage is formed to engage and release the wedge body from the shaft rod. fits in the space of
However, since only a wedge body that engages and disengages from the pressure stage is used to operate the shaft rod, an elevating cylinder that is raised and lowered by a cam is fitted into the guide cylinder that has a relief groove, and Unlike conventional devices, which contain a ball that escapes into a relief groove when ascending and engages the clamp head of the shaft rod when descending, the structure is extremely simple, so it can be manufactured at low cost and has excellent workability. It does not break down or get damaged even when used frequently, and even if it does break down, it does not become impossible to remove from the mold.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of the implementation of a device related to the present invention. Figure 2 is a side view of the same formwork as above. FIG. 3 is a longitudinal sectional side view showing the structure of the main parts of the same device. Figure 4 is a longitudinal sectional front view of the same as above. FIG. 5 is a longitudinal sectional side view showing another example of the wedge body in the same device. 6th
The figure is a plan view across the same shaft rod. FIG. 7 is a longitudinal sectional side view of the same device as above, with the setting means attached to the shaft rod. FIG. 8 is a cross-sectional lower side view taken along the line X--X in FIG. 7. In the figure, 1 is a base, 2 is a plug collar, 3 is a support tube, 4 is a shaft rod, 5 is a T-shaped head, 6 is a pressure stage, 8 is a connecting rod, and 10 is a wedge body.

Claims (1)

[Scope of utility model registration request] A support tube is installed vertically at the position where the plug collar on the base should be set, and the support tube is inserted into the support tube so that it can be raised and lowered, and the upper part having a T-shaped head and the lower part having a pressure step are connected by a spring. A track characterized in that it is provided with a shaft rod, a connecting rod that moves horizontally along the shaft rod, and a wedge body attached to the connecting rod so as to be connected to and disengaged from a pressurizing stage of the shaft rod. Embedded plug collar fixing device for slabs.