JPH0578814U - Jig for inserting wedge member into PC cable - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A wedge member to be used for fixing the end of a PC cable that has been strained after hardening of concrete to an anchor head is inserted into the PC cable and set. The purpose is to obtain ingredients. An operation cylinder body 20 having a diameter slightly larger than the diameter of the PC steel material 18 is connected to an end portion of a holding cylinder 16 surrounding a head side portion of the wedge member 14, and a wedge member is provided inside the holding cylinder 16. It is configured by forming a step portion that abuts 14 heads. In this insertion jig 10, the wedge member 14 and the operation cylinder body 20 mounted on the holding cylinder 16 are connected to the PC cable 1.
8 and slides to the wedge fixing recess of the anchor head 34 to temporarily fix it, so that the wedge member 14 can be set easily and quickly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig for inserting and setting a wedge member used for fixing an end portion of a PC cable that is strained after hardening of concrete to an anchor head into the PC cable.

[0002]

[Problems to be solved by conventional techniques and devices]

 As a method of prestressing a concrete structural member with a PC cable, a so-called post-tension system, in which the PC cable is tensioned and fixed after hardening of the concrete, is known, and the end of the tensioned PC cable is known. As a concrete method for fixing the above, a fixing method called VSL method has been widely adopted and provided for the convenience of users.

That is, this VSL method is prepared by preparing an anchor head having a plurality of PC cable insertion holes at predetermined locations on a disc, and inserting the PC cable into each insertion hole of the anchor head. Insert the wedge member into the PC cable in advance to position (temporarily fix) it, and then attach the wedge member to the anchor recess of the anchor head with a predetermined tension applied to the PC cable by the center hole type jack device. The PC cable is fixed by inserting the wedge member into the PC cable or the like located in the center because the gap between the PC cables is narrow and the anchor head is positioned in the fixing recess (temporary). Since the setting including the stop) is complicated, there is a problem that the fixing work of the PC cable cannot be performed smoothly. Was there.

[0004]

[Means for Solving the Problems]

 In view of this, in this invention, an operating cylinder set to have a diameter slightly larger than the diameter of the PC cable is connected to the end of the holding cylinder dimensioned so as to surround the head side portion of the wedge member, and the holding cylinder is connected. It is intended to facilitate the setting work of the wedge member by using an insertion jig formed by forming a stepped portion that contacts the head portion of the wedge member inside.

In this case, by disposing the magnet on the stepped portion formed on the holding cylinder, it is possible to suitably prevent the wedge member from falling off when the wedge member is inserted into the PC cable.

[0006]

[Work]

 According to the present invention, the wedge member and the operating cylinder are inserted into the PC cable with the head side portion of the wedge member attached to the holding cylinder, and the operating cylinder is gripped to retain the wedge member as it is in the wedge fixing recess of the anchor head. The wedge member is set by sliding it up to.

[0007]

【Example】

 A preferred embodiment of the insertion jig according to the present invention will be described below in detail with reference to the accompanying drawings.

Referring to FIG. 1, an insertion jig 10 according to the present invention includes a holding cylinder 16 that surrounds and holds a head side portion (maximum diameter portion) of a wedge member 14 having a diametrical groove 12. The operating cylinder 20 having a predetermined length slightly larger than the diameter of the PC cable 18 is connected to the end side of the holding cylinder 16, and the operating cylinder 20 is further provided inside the holding cylinder 16. A step portion 22 is formed by the tip of the step and a magnet 24 is arranged on the step portion 22.

The magnet 24 disposed on the step portion 22 is for preventing the wedge member 14 held by the holding cylinder 16 from falling off during setting work.

Next, the procedure for setting the wedge member 14 using the insertion jig 10 according to the present invention having the above-described structure will be described.

That is, FIG. 2A shows that after the concrete 26 is hardened, the end form is removed, and the not-shown ends of the many PC cables 18 inserted through the casting support plate 28 and the sheath member 30 are already fixed. It is in a state of being. Reference numeral 32 is a spiral reinforcing bar for reinforcing the fixing portion.

In this state, first, the anchor head 34 is suspended and held by an appropriate suspending means, and the tip end portion of each PC cable 18 is guided by an appropriate cylindrical body 19 such as a gas pipe to guide the anchor head 34. Insert into the PC cable insertion hole 36. Then, the anchor head 34 is slid rightward in FIG. 2A along the PC cable 18 and brought into contact with the casting pressure plate 28 (shown by a broken line).

Next, the tubular body 19 is removed and the wedge member 14 is inserted into each PC cable 18. At this time, the wedge member 14 inserted into the PC cable 18 located at the center is As shown in FIG. 1, the wedge member 14 is attached to the holding cylinder 16 of the insertion jig 10, and the head side portion is previously attracted to the magnet 24 arranged on the step portion 22. If the operating cylinder 20 is inserted into the PC cable 18 as it is, and the operating cylinder 20 is gripped, the wedge member 14 is moved and pushed into the wedge fixing recess 34a of the anchor head 34, setting including temporary fixing is performed. Good (see Figure 2b).

It should be noted that the setting of the wedge member 14 on the PC cable 18 located at the peripheral portion may be performed in the conventional manner. However, when the PC cable 18 has several tens, the insertion jig according to the present invention may be used. By using the tool, the wedge member 14 can be set easily and efficiently.

When the setting of each wedge member 14 is completed in this way, the wedge member 14 is firmly attached to the anchor head 34 with a predetermined tension applied to the PC cable by using the center hole type jack device. By fixing and removing the jack device and then removing the excess portion of the PC cable, it is possible to add a predetermined press stress to the concrete.

[0016]

[Effect of the device]

 As described above, according to the jig for inserting a wedge member according to the present invention, even if the PC cable is located at the center of the anchor head and has a narrow gap between adjacent PC cables, The setting including the insertion of the wedge member and the positioning of the anchor head in the fixing recess can be easily and quickly performed, and therefore, the fixing work of the PC cable can be smoothly carried out. Effect is extremely large.

Also, regarding the procedure for setting the wedge member to the PC cable using this insertion jig, the heavy anchor head is suspended and held by an appropriate suspending means, and the tip of each PC cable is suspended. Since the tubular body is used as a guide and is inserted into the PC cable insertion hole of the anchor head and is slid, the work can be facilitated.

The preferred embodiment of the wedge member inserting jig according to the present invention has been described above. However, the present invention is not limited to this embodiment, and various modifications can be made without departing from the spirit of the present invention. Of course, modifications can be made.

[Brief description of drawings]

FIG. 1 is a partially omitted cross-sectional explanatory view showing a relationship between a wedge member insertion jig according to a preferred embodiment of the present invention and a wedge member.

2A and 2B are explanatory views of a setting procedure of a wedge member on a PC cable, wherein a is an explanatory view when inserting an anchor head into a PC cable, and b is a jig for inserting the wedge member shown in FIG. It is explanatory drawing at the time of setting a wedge member using it.

[Explanation of symbols]

10 Insertion jig, 12 Split groove, 1
4 wedge members, 16 holding cylinders, 18 PC cables, 1
9 cylinders, 20 operation cylinders, 22 steps, 2
4 magnets, 26 concrete, 28 casting bearing plates,
30 sheath member, 32 spiral reinforcing bar, 34 anchor head,

Claims (2)

[Scope of utility model registration request] 1. A jig for inserting a wedge member used for fixing an end portion of a PC cable, which is strained after hardening of concrete, on an anchor head into the PC cable, the head side of the wedge member. A step in which a holding cylinder that surrounds the portion is provided, and an operating cylinder set to have a diameter slightly larger than the diameter of the PC steel material is connected to the end of the holding cylinder, and the wedge cylinder head is abutted inside the holding cylinder A jig for inserting a wedge member into a PC cable, characterized by forming a portion. 2. The jig for inserting a wedge member into a PC cable according to claim 1, wherein a magnet is arranged on a step formed on the holding cylinder.