JPH066285B2 - Formwork loosening tool and formwork loosening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mold clamping for facilitating clamping and loosening of a mold for molding a concrete secondary product, particularly a long concrete secondary product. TECHNICAL FIELD The present invention relates to a loosening tool and a fastening device therefor.

[Conventional technology]

The conventional tightening and loosening means of a mold for molding a secondary concrete product has been to provide a flange at the mating portion of the mold and tighten and loosen between the flanges with a bolt and a nut. In this tightening / loosening method, it takes time to tighten and remove the bolts and nuts. Especially when using a long formwork, many bolts and nuts must be provided according to the length, and they must be removed one by one. It took a lot of time and ability to tighten and remove.

The present inventor provides a bolt and nut on a moving body and a wedge piece on a flange portion to facilitate the tightening and removing work of the bolt and nut, and tightens and loosens the form frame by sliding the moving body. Developed the device and first applied for Japanese Patent Application No. 48-116955 (Japanese Patent Publication No. 51-252).
No. 44), and the present inventor has also developed a tightening / releasing mechanism provided on a spring-fitted holder flange portion to prevent the bolt from falling off during tightening / loosening work. No. 55-122067 Application (Actual exploitation 57-5
9293). The development of these tightening and loosening devices has improved the ease of tightening and loosening work with the bolts and nuts of the formwork to some extent, but since the tightening and removing work of the halt nut itself remains in these devices, the work time and labor are It cannot be ignored, and especially in the case of a long formwork, the time and labor required for it were large, which hindered improvement in productivity.

[Problems to be solved by the invention]

INDUSTRIAL APPLICABILITY As described above, the present invention facilitates the bolt-nut tightening and dismounting work that has been a problem when tightening and unfastening the mold for molding the concrete secondary product, so that the mold is automatically and quickly and surely secured. It is an object of the present invention to provide a mold clamping device and a clamping device thereof that can clamp a frame.

[Means for solving problems]

The present inventor, as a result of diligent research on specific means for achieving the above-mentioned object, by using a tightening / releasing tool as described below, does not require tightening and dismounting with a bolt nut as in the prior art, and automatically and The present invention has been completed by finding that the mold can be securely fastened in a short time.

That is, the mold clamping device of the present invention is a mold in which a flange is provided at each meeting portion of a split mold consisting of upper and lower molds, and the upper and lower molds are clamped and clamped via bolts inserted into through holes of the flange. In the frame tightening / relaxing tool, an extension spring is attached to a bolt slide cylinder provided on the lower surface of one of the through holes of the flange, and the lower end of the bolt having a nut portion on the lower end of the spring is attached to the spring and the flange. The through-hole is fixed so that it can be inserted, and the wedge that tightens and loosens the head of the bolt is placed on the upper surface of the other flange, and the wedge connecting arm equipped with the wedge slide pin on the side can be slid. It is characterized by being provided.

In addition, the device for tightening and loosening a mold provided with the tightening / releasing device of the present invention includes a mold pedestal supporting a bolt for tightening and loosening, and a mold provided on a beam provided in a beam metal fitting. In addition to providing a claw that slides the wedge, fix the lower part of the cylinder to the end of the beam receiving bracket, connect the beam to the tip of the cylinder ram, and reciprocally move the claw to reciprocate the cylinder to remove the wedge of the formwork. The apparatus is characterized in that a device for sliding and fastening the two split molds is placed on a fastening device receiving table.

[Action]

In the mold clamping device of the present invention, when the mold bolt is placed on the mold holder, the extension spring of the bolt is compressed by the dead weight of the mold to move the bolt upward, and the flanges of the upper and lower molds. It projects above the through hole of the meeting portion. At this time, a predetermined gap is formed between the lower surface of the bolt head and the upper flange surface, and the beam is horizontally moved by driving the cylinder of the mold clamping device in the gap, and the wedge connecting arm and wedge are pushed by the claws provided on the beam. It tightens the formwork. on the other hand,
When loosening the wedge, the tightening is automatically released simply by driving the cylinder in the reverse direction.

〔Example〕

 Next, embodiments of the present invention will be described in detail with reference to the drawings.

In order to configure the entire mold, two upper and lower unit molds 2, 3 can be divided in the lengthwise direction, and flanges 7, 8 are provided at the joints on both ends in the lengthwise direction. This flange 7,
It is exactly the same as the conventional type in this type of mold having a through hole in 8.

In the embodiment of the present invention, the heads of the tightening bolts 9 are provided on the non-joining surfaces of the pair of flanges 7 and 8 of the two unit molds 2 and 3, respectively, which are joined to each other. A wedge 10 for loosening 6 is placed, and this wedge 10 is integrally formed with a connecting arm 16 having a wedge slide pin 18 on its side. The wedge connecting arm 16 includes a pair of arms and two pairs of wedges 10,
A slide guide 1 whose center is fixed to the flange 7.
9 is held by a holding nut 21 via a seat plate 20. Further, a bolt slide cylinder 11 is fixed to the lower surface of the through hole on the flange 8 side.
1, the upper end of the extension spring 14 is fixed, the lower end of the tightening bolt 9 is fixed to the seat plate 12 at the lower end, and the extension spring 14 and the through hole 22 are attached to the nut 13 provided therein.
A tightening bolt 9 is provided so that it can be inserted therethrough. The tightening bolt 9 is normally kept in a state in which the head of the tightening bolt is submerged in the through hole 22 of the flange 8 by an extension spring. A frame-shaped fastening / loosening device cradle 29 having a mold cradle 25 for supporting the lower end of the bolt 9 of the mold provided with the above-mentioned mold fastening / relaxing device is provided with a beam extending upward in the longitudinal direction thereof. A receiving bracket 26 is provided. The beam receiving metal fitting 26 is projected from one side of the fastening device receiving base 29, and the protruding portion 30 has a cylinder for sliding the slide beam 24 supported by the beam receiving metal fitting. Two
7 is provided. The slide beam 24 in which the piston frame of the cylinder ram 27 is provided with a claw 23 for sliding the wedge 10 of the mold 2 with a joint pin 28.
Are linked to. Therefore, the slide beam 24 slides by driving the cylinder 27, and the wedge slide pin 18 and the wedge connecting arm 16 are moved via the claw 23 to tighten and loosen the wedge 10 to the tightening bolt 9.

The positional relationship between the claw 23 and the wedge slide pin 18 is as shown in FIG. 9 between the pair of wedge connecting pins 16 and the claw 23 of the slide beam 24 between the pair of wedge slide pins 18 and 18, respectively. 23 is provided inward. The use of one embodiment of the invention will now be described. On the form frame pedestal 25 of the form frame tightening / loosening device 29 having the structure described above, the bolt 9 portion of the split form frame composed of the upper and lower molds 2 and 3 is placed. In this case, the bolt extension spring 14 is compressed by the weight of the mold, and the head of the bolt 9 is inserted through the through hole 22 protruding from the joint of the flanges 7 and 8 of the upper and lower molds 2 and 3 to project. To do. At this time, a predetermined gap is formed between the upper surface of the flange 7 of the upper mold 2 and the lower portion of the head of the bolt 9. Next, the cylinder 27 is operated to move the long slide beam 24 to the position shown in FIG.
It is moved to the left in FIG. As the slide beam 24 moves to the left, the claws 23 of the slide beam 24 push the wedge slide pins 18 forward, and the wedge connecting arms 16 are simultaneously moved to the left. As a result, the wedge 10 attached to each wedge connecting arm 16 is inserted into the predetermined gap between the head portion 6 of the bolt 9 and the flange 7,
The fastening bolts are pushed up and the flanges 7 and 8 of the upper and lower molds are fastened. Since an external load such as vibration or centrifugal force is applied during the molding of the concrete secondary product, the joint 4 at the time of tightening needs a proper associating force so that the liquid of the concrete component does not leak at the time of molding. When it is large, the formwork is deformed,
Since it affects the accuracy of the product, it is adjusted by the wedge 10 for adjusting an appropriate force and fixed at an appropriate position.

After molding, it is necessary to disassemble the clamped molds 2 and 3 in order to remove the molds from the mold. This disassembling operation places the molds again on the clamping device pedestal and the cylinder 27 is removed. The slide beam 24 moves to the right by moving in the direction opposite to the tightening direction, that is, to the right in FIGS. 9 and 10, and the wedge 10 can be extracted.

〔effect〕

By using the mold clamping device and the clamping device of the present invention, no manual work for tightening and removing the bolt, which requires a great deal of labor, is required, and the mold can be securely and automatically tightened in a short time. It can be said that the present invention plays an important role in improving productivity.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a state view in which upper and lower molds are fastened, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a top view of an upper mold flange portion. FIG. 4 is an enlarged view of a portion E of FIG. 1 of the wedge connecting arm, FIG. 5 is a mold clamping and loosening tool of this embodiment, FIG. 6 is a top view of a lower mold flange portion, and FIG. FIG. 8 is a view showing a state before the mold is placed on the fastening device stand, FIG. 8 is a side view of FIG. 7, FIG. 9 is a top view of the mold placed on the fastening device, and FIG. 9 is a side view of FIG. 9, and FIG. 11 is a sectional view taken along the line BB of FIG. DESCRIPTION OF SYMBOLS 1 ... Concrete molded product, 2 ... Upper formwork, 3 ... Lower formwork, 4 ... Upper and lower formwork joints, 5 ... Rotating tire, 6 ... Upper fastening nut, 7 ... Upper formwork flange, 8 ... Lower formwork Frame flange, 9 ... Tightening bolt, 10 ... Wedge, 11 ... Bolt slide cylinder, 12 ... Washer, 13 ... Nut, 14 ... Bolt extension spring, 15 ... Bolt fall prevention stopper, 16 ... Wedge connecting arm, 18 ... Wedge slide pin, 19 ... Slide guide, 20 ... Seat plate, 21 ... Press nut, 22 ... Bolt through hole, 23 ... Claw, 24 ... Sliding beam, 25 ... Form support, 26 ... Beam receiving Metal fittings, 27 ... Cylinder, 28 ... Joint pin, 29 ... Fastening device stand, 30 ... Projection part.

Claims (2)

[Claims] Claims: 1. A mold clamping device, wherein flanges are provided at respective meeting portions of split molds composed of upper and lower molds, and the upper and lower molds are clamped and clamped via bolts inserted into through holes of the flanges.
An extension spring is attached to a bolt slide cylinder provided on the lower surface of one of the through holes of the flange, and the lower end of the bolt having a nut portion on the lower end of the spring can be inserted through the through hole of the spring and the flange. A wedge that is fastened to the head of the bolt is placed on the upper surface of the other flange, and a wedge connecting arm provided with a wedge slide pin is provided slidably on the side. Form tool for loosening. 2. A form frame pedestal for supporting the bolts of the form frame, and a claw for sliding the wedge of the form frame on the beam provided in the beam bracket, and the end of the beam bracket. The lower part of the cylinder is fixed to this part, the beam is connected to the tip of the cylinder ram, the claw is reciprocally operated by the reciprocating operation of the cylinder, and the wedge of the form is slid to tighten and unclamp the device that halves the form. A mold clamping and loosening device characterized by being placed on a device pedestal.