JPS58192624A - Hoop wrench - Google Patents

Abstract

PURPOSE:To raise the work efficiency of a hoop wrench, by operating a bending arm of a winding hoop by a piston rod by oil pressure, when the winding hoop is wound round a main hoop by the hoop wrench in case of reinforced concrete construction. CONSTITUTION:The end part of a winding hoop H to be wound to a main hoop S is placed at a prescribed position so as to fall at a right angle with the main hoop S. A main hoop receiving face 45a of a hoop wrench is made to press- contact with the main hoop S, and the winding hoop H is placed against the main hoop receiving face 45a by an arm 41. Subsequently, a cam 16 is rotated by driving a motor 11, by which a piston 17 is made to perform a reciprocating motion, oil in an oil tank 14 is compressed and pressurized oil is obtained. The pressurized oil goes into a cylinder chamber 20, moves a piston rod 38 to the left, the arm 41 approaches a main hoop receiving part 45, the end part of the winding hoop H is bent like H'' and it is wound around the main hoop S. In this way, the winding hoop can be wound around the main hoop by simple handling and with high work efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hoop wrench used for bending the ends of hoops and stirrups in reinforced concrete construction. .

Technical background of CR Ming and its problems] In general, in reinforced concrete construction, building columns,
In order to construct beams, the strength of beams and beams is improved by combining a large number of reinforcing bars into a network and burying them in concrete columns or frames.

The method of constructing reinforcing bars is to combine horizontal reinforcing bars (or multiple main reinforcing bars placed horizontally and parallelly) into a band shape with the ends bent at almost right angles, and Attachment is accomplished by fixing by further bending (usually about 135°).

This work of bending the end of the winding bar and wrapping it around the main bar is usually done using a hoop wrench, but the conventional hoop wrench is a hydraulic cylinder. x) yo7F acid red curling muscle N[lII&ll°7- The structure is such that the arm is attached to the arm and the arm is swung by supplying pressure oil to a hydraulic cylinder to perform the bending action. The pressure oil supplied to this hydraulic cylinder is supplied through a hydraulic hose from a separate oil supply unit including an oil storage tank and a pump, and is returned to the separate tank through the hydraulic hose again.

In construction halls, etc., where work is carried out at relatively high positions or where workers frequently move around, the connected hydraulic hoses may get in the way, or it may be difficult to find a place to place a separate lubrication unit. There is a problem.

Additionally, when supplying pressure oil to a hydraulic cylinder, an air hole must be provided in the tank to prevent a vacuum from forming inside the tank. This may cause malfunctions such as Additionally, remote control of the separately installed refueling unit requires a remote control switch and special wiring. Further, after the bending operation is performed, the pressure oil in the hydraulic cylinder must be drained and the piston lid must be moved back, but this operation is complicated because a manual pressure reducing valve is used.

Additionally, if the diameter of the main reinforcement or the bending angle of the first reinforcement changes, the amount of swing of the arm must be adjusted, but this adjustment is similar to adjusting the piston stroke of the hydraulic cylinder. This makes the structure complex and operation difficult.

[Purpose of the invention]

The present invention has been made in consideration of these points.
The purpose is to provide a hoop wrench that is easy to handle and has good work efficiency.

[Summary of the invention]

The hoop wrench of the present invention includes an oil tank for storing oil in the casing body of the hoop wrench, pressurized oil is fed to a cylinder chamber by an oil pump mechanism disposed in the casing body, and a piston is placed in contact with the cylinder chamber. The folding arm is operated by moving the lid forward and backward. (9) In the hoop wrench according to the present invention, the spool valve mechanism is folded inwards so that the piston lid can be automatically returned. Further, in the hoop wrench according to the present invention, the main reinforcement support can adjust the mounting position of the member, so that even if the main reinforcement diameter or the first reinforcement bending angle changes fc, it can be easily adjusted.

[Invention 0 Example] The implementation of the present invention will be described below with reference to the drawings.

@Figure 1 is the information number r side view of the hoop wrench according to the present invention, and the second figure is
The figure shows the tip of the hoop wrench according to the present invention as seen from the direction of the arrow in FIG. 1. In the figure, reference numeral 11 denotes an electric motor, which is attached to the casing body 13 with the motor shaft 12 inserted into the casing body 13. An oil tank 14 in which oil is stored is provided inside the casing body 13, and a pump *mI5 for pumping the oil in this #JIIIIJ is also provided. The pump II oval 15 includes a cam portion 16 formed at the tip of the motor shaft 12, a piston 17 that is reciprocated by the cam portion 16 via a second dollar bearing, and is arranged in an oil passage. Unlike the on-off valve 18, the on-off valve 18 normally closes off the oil passage by means of a spring 19.

A cylinder chamber 2o is formed approximately in the center of the casing body 13, and this cylinder 1120 and the oil tank 14 are connected to a vertical wall 2o.
It is divided by 1. A plurality of pump mechanisms 15 (for example, three) are arranged, and except for one pump mechanism 15 (indicated in the upper position in FIG. 1), the other pump mechanisms 15m (indicated by a chain line downward in FIG. 1) are connected to each other. An oil supply path ρ for feeding pressure oil passes through the vertical wall 21 to the cylinder '1120.
It is connected to. The cylinder weight and the oil tank 14 are communicated through a communication passage 4 provided through the vertical wall, and a spool valve mechanism is disposed in the middle of the communication passage.

The spool valve 11 functions to open and close the communication passage 4, and is formed vertically with 9 cylindrical cylinders.

Inside this cylindrical cylinder b, nine spools and a spool 26 are disposed so as to be slidable in the axial direction with a minute gap (for example, a diameter gap of 0.1 mm) between them and the inner wall of the cylindrical cylinder.
C) Consisting of nine springs n disposed within a cylindrical cylinder δ so as to abut against the tip ζ.

There is. The cylindrical cylinder 5 is located at the front position, and the cylinder 1[2
There is a forming field nine valve seats in the middle of the communication passageway that communicates between 0 and the oil tank mechanism 4, and a passageway 4 that communicates with pump machine #I15, one of the plurality of pump mechanisms, is opened at the rear. ing. Furthermore, a valve body is formed at the tip of the spool 26 to open and close the valve seat 4 in the cylindrical cylinder 5. When the pump mechanism 15 is not operating, the spool 26 is pushed up by a spring n until its rear end contacts the stopper 31. An oil return passage 32 is formed in the vertical wall 21 to communicate with the oil tank 14 and the front end of the cylinder (the end opposite to the vertical wall 21). , an air bag section is arranged and branched into 9 pressure buffers &34. Pressure buffer electric control is hoop wrench handle 3
It is formed within 5. In addition, a release hole communicating with the pressure buffer chamber is bored at an appropriate position closer to the front end than the center of the cylinder load.

A piston 7 flange 37 is disposed within the cylinder so as to be slidable in the axial direction, and four pistons F38 are joined to the back surface of the piston 7 flange 37. Casing body 13 that seals the piston rod opening and cylinder load
It penetrates the front part 13m and protrudes out of the casing body,
A semicircular recess #139 is formed at its tip. The back side of the piston 7 flange 37 and the front part 1 of the casing body 13
A piston 7-lunge return spring is disposed between the piston and the piston.

At the tip of the front portion 13a of the casing body 13, the center portion of a single-stripe bending arm 41 is swingably supported on a shaft 42 rotated in a direction perpendicular to the axis of the piston rod. This bending arm 41 has a tip K
A presser pawl 43 is formed to bend the I# thread H, and a connecting pin 44 is attached to the rear end of the piston, which is rotatably inserted into the groove 39 at the tip of the four piston wings. Casing body 1
At the tip of the front part 13a of the arm 41, a spring guard part 45 is also attached at a position facing the arm 41. As shown in FIG. 2, the main reinforcement support portions 45 are arranged in pairs on the left and right with the arm 41 open, and the main reinforcement support portions 45 facing the arm 41 have a surface 45. The main bar receiver part 6 is the winding bar H
When the main reinforcement S is wrapped around the main reinforcement S, the main reinforcement S is received), and is fixed to both sides of the front part 13m of the casing body 13 by bolts. As shown in FIGS. 3 and 4, on both sides of the front part 13 & of the casing body 13, anti-slip members 47 are fixed, each having a large number of longitudinal grooves. A large number of vertical grooves that engage with this vertical groove are also formed on the mounting surface, and by these engaging with each other, the attachment of the main reinforcement receiver to the section 45 is reinforced, and a large pressing force is applied to the main reinforcement receiver. Even when acting on the surface 45m, the main bar receiver 45 is prevented from moving.

In addition, the bolt insertion hole of the main bar receiver section 45 has been made longer, so it can be done by loosening the bolt 46 and adjusting the mounting position of the main bar receiver section 6 by moving it closer or closer to the arm 41. It is being done.

Next, the operation of this embodiment having such a configuration will be explained.

12iii8 (S
is placed so that it abuts at a predetermined position from the perpendicular direction of the main reinforcement S, and the main reinforcement support of the hoop wrench is placed so that it is in contact with the main reinforcement S at a predetermined position from the perpendicular direction. 4
1 is placed between the main bar H and the surface 4Sa (see Fig. 1). After setting the hoop wrench to the main reinforcement S and the rumble H in this manner, the switch 11 & of the electric motor 11 of the hoop wrench is turned on. Due to the drive of the electric motor 11), the motor shaft is driven to rotate, and the cam 1
Rotates for 64 hours. This causes the piston 17 to reciprocate, sucking and compressing the oil in the oil tank 14 to generate pressure oil. The nine pressure oil generated by the pump mechanism 15 is applied to the spring 1
9, the on-off valve is pushed up, and the valve is pumped through passage 4 to the spool valve mechanism, and at the same time, it is pumped to the other pump mechanism 15.
The pressure oil generated by m passes through the oil supply path 4! 20. Pressure oil is fed to the spool valve mechanism from the rear of the cylindrical cylinder δ, and pushes the spool A forward against the spring n. As the spool moves forward, the valve body (9) at the tip moves into the cylindrical cylinder 250.
The valve seat is inserted and engaged to close the opening of the valve seat. As a result, the communication passage connecting the oil tank [4 and the cylinder load] is blocked and closed. Subsequently, the pressure oil pumped into the cylindrical cylinder 25 from the pump mechanism 15 flows through the gap between the spool and the inner diameter of the cylindrical cylinder 5, and is returned to the oil tank 14 through the communication passage. As a result, the spool valve mechanism maintains the communication field between the oil tank 14 and the cylinder chamber 2o in a blocked state.

The pressure oil fed into the cylinder chamber 20 acts on the 7 flange surfaces of the piston 7 langes r, and moves the piston flange 37 and the piston rod 38 to the left in FIG. 1 against the return spring force. As a result, the connecting pin 44 at the rear end of the arm 41 is pushed to the left in FIG.
3, the main reinforcement bridge swings toward the portion 45. As the arm 41 swings, the end of the ringer H is bent as shown by the symbol -j'tH' in FIG. 1, and is wrapped around the main yBJS.

This bending is done to prevent the arm 41 from swinging too much during work and to prevent the ringer H from wrapping around the piston flange 3 more than necessary.
7 passes through that position of the release hole, the pressure oil inside the cylinder is transferred to the release hole 3b, the pressure buffer chamber A, and the oil tank 1.
4 and stops further advancement of the piston 7 flange 37 and piston rod 38.

When the piston rod stops moving forward and the winding operation by the arm 41 is completed, the switch 11a is turned off and the operation of the electric motor 11 is stopped. As a result, the supply of pressure oil from the pump mechanism 15 is stopped, and the spool 26 of the spool valve mechanism is pushed back to the rear by the spring n, and the engagement between the valve element and the valve seat is released. The electroformed cylinder and the oil tank 14 are communicated again through a communication passage, the pressure oil in the cylinder is returned to the oil tank 14, and the piston crank a is pushed back to the right in FIG. 1 by the return spring. As a result, the tip of the arm 41 is swung leftward in FIG. 1, the presser claw C at the tip is separated from the ringer H, and the hoop wrench is removed from the location where the main bar 8 and the ringer H are assembled.

When the diameter of the main reinforcement S and the 1st ring change and the folding seam angle is changed and adjusted, the mounting position of the main reinforcement support part 6 needs to be moved and adjusted. This is done by loosening the main bar receivers 45 attached to both sides Kf1 of the front part 131 of the casing body 13, and moving the main bar receivers 45 in the front-rear direction by taking advantage of the longer length. be able to. When the main reinforcement supports are moved to a predetermined position and intersected, and the bolts are tightened, the multiple vertical grooves on the mounting surface engage with each other, and the mounting and fixation are firmly established.

FIG. 5 is a sectional view of a main part showing another embodiment of the present invention.

In this embodiment, the spool valve mechanism 50 includes a cylindrical cylinder 51, a spool 52 that slides in the axial force direction inside the cylindrical cylinder 51, and a spool 52 disposed in the cylindrical cylinder 51 in front of the spool so as to come into contact with the tip of the spool 52. However, the gap between the spool 52 and the inner diameter of the cylindrical cylinder 51 is not as large as in the ninth embodiment shown in the first factor, and the spool 52K is An elongated through hole 54 is formed in the. Further, the plate end of the spool 52 is made one step ag from near the center, and a perpendicular hole 55 communicating with the through hole 54 is bored therein.

A communication passage 56a communicating with the cylinder chamber 20 is opened near the center of the cylindrical cylinder 51, and a communication passage 56t communicating with the oil tank 14 is opened at the steering force position of the cylindrical cylinder 51. Further, an oil supply passage 29 is opened at the rear of the cylindrical cylinder 51 and communicates with one of the pump mechanisms 15 of the plurality of pump mechanisms. The rest of the structure is the same as that of the embodiment shown in FIG. 1, and therefore is indicated by the same reference numerals.

According to this embodiment, the pressure oil generated by the operation of the pump mechanism 15 is sent through the passage 29 to the rear of the cylindrical cylinder 51 and advances the spool 52 against the spring 53. As the spool 52 advances, the υ communication path 56
& is closed by the outer circumferential wall of the spool 52, and communication between the cylinder 'di' and the oil tank 14 is cut off. Subsequently, the pressure oil pumped from the pump mechanism 15 enters the through hole 54 through the hole 55, and enters the communication hole 5 in front of the cylindrical cylinder.
6b to the oil tank 14, the spool 52 is in a state that blocks the communication path 561! wo can be maintained. This causes the cylinder i! from the other pump mechanism 15a! The pressure oil forced into the cylinder acts on the screw flange 37, and similarly to the ninth embodiment described above, the piston rod is moved to the left in FIG. 5, causing the arm to perform a bending action.

When the electric motor is switched off to stop the operation of the pump mechanism 15, the spool 52 is pushed back rearward again by the action of the spring s3, opening the communication path 56a. This connects the cylinder weight and the oil tank 14,
The pressure oil in the cylinder is returned to the oil tank 14, and the p-piston flange is moved to the right in FIG. 5 by the release of the return spring.

〔Effect of the invention〕

As explained above, according to the present invention, the oil tank and the pump mechanism for operating the piston are built into the casing body of the hoop wrench, so there is no need for a separate oil supply unit as in the conventional case. 2. Easy to handle and can improve work efficiency. In addition, a spool valve mechanism is installed between the cylinder chamber and the oil tank.

Automatically shuts off the communication path between the cylinder chamber and oil tank.
Since it is designed so that it can be opened, the swinging of the arm for bending the first bar is automatically performed by simply turning on and off the switch of the electric motor. (9) The main reinforcement support is attached so that its parts can be adjusted and moved, so even if the diameter of the single-turn main reinforcement changes, it can be easily adjusted. Furthermore, the main reinforcement supports have many longitudinal grooves formed on the mounting surface of the parts and are designed to engage with each other, so even if a large load is applied to the main reinforcement supports, the main reinforcement supports will not be affected by the parts. IIa will not occur. In front, a release hole is set at a desired position in the cylinder chamber to allow pressure oil to escape, so the swinging of the arm automatically stops at a predetermined position, preventing excessive vibration. be done.

As described above, according to the present invention, the hoop wrench can be easily handled and work efficiency can be improved.

[Brief explanation of the drawing]

Fig. 1 is a top view of the hoop wrench according to the present invention, Fig. 2 is a view showing the tip of the hoop wrench as seen from the direction of the arrow IN1, and Fig. 3 is the top view of the hoop wrench. Viewed from the direction of El arrow B, the main bar receiver is a partial side view showing the installation state, No. 411 is a side view taken along line 3 - ■, and Fig. 5 is a main part showing another embodiment of the present invention. FIG. 11-electric motor, 14-oil tank, 15, 15 a-=
Pump mechanism, additional cylinder chamber, 22, 29...oil passage, n/series passage, 6-cylindrical cylinder, additional spool, I...spring, 4--valve Seat, valve body, release hole, 37...
Piston 7 lange, A. Piston rod, cut/return spring, 41. Arm, 43. Holder claw, 45. Main reinforcement support, 46. Bolt, 47. Anti-slip member, rug. ...Long hole, Seki--Spool valve mechanism, 51--Cylindrical cylinder, 52-Spool, 53--Spool, 54-
Through hole, 56a, 56b continuous passage. Applicant's agent: Inomata Kiyomi 2゛Courage 5 Rouman 3゛

Claims (1)

[Claims] 1. An oil tank is provided inside, and a plurality of oil tanks are arranged in the casing body and the tray casing body, and a pump mechanism for pumping the oil stored in the oil tank and the pump formed in the glue casing body; A piston 7 flange is disposed slidably in the axial force direction in the cylinder chamber to which pressure oil is supplied from the mechanism and the first cylinder chamber, and a piston rod is connected to the back surface of the piston 7. It is arranged in the middle of a passage which is arranged in the main body and communicates between the nine-piston, seven-lunge return spring, the first cylinder chamber and the oil tank, and is operated by pressure oil pumped from one of the plurality of pump mechanisms. A spool ff mechanism that closes the communication passage and a winding that is swingably supported on the front part of the glue casing body, a presser claw is formed at the tip, and a rear end is pivotally connected to the tip of the piston base. The arm for reinforcing tensioning is attached to the front part of the casing main body in a relationship facing the arm, and the main reinforcing bar has a surface. A hoop wrench for wrapping strings. The two-spool valve mechanism has a valve seat formed in the middle of a passage that communicates between the cylinder chamber and the oil tank at the front, and a passage that communicates with one of the plurality of pump mechanisms at the rear. A cylindrical cylinder and a multi-tip valve body that engages with the valve seat are formed, and the valve body is disposed within the cylindrical cylinder so as to be slidable in the axial direction with a small gap between it and the inner wall of the cylindrical cylinder. 2. The hoop wrench according to claim 1, further comprising a spool with a cylindrical shape and a spring 1 disposed between the valve seat and the tip of the spool. 3. The spool valve mechanism is formed in the middle of a passage that communicates between the cylinder chamber and the oil tank, and is connected in the direction of the glue axis to a cylindrical cylinder that has a passage that communicates with one of the plurality of pump mechanisms at the rear. A spool having an elongated through hole and sliding in the axial direction within the cylindrical cylinder to connect and open a passage communicating between the cylinder chamber and the oil tank; The hoop wrench according to claim 1y4, further comprising a spring polisher disposed within the cylindrical cylinder. 4. Hoop wrench of Patent No. 117 No. 1 Kiei, characterized in that the main bar support member is attached at the v4 node hJwhi. 5. The main reinforcement support member is attached to the casing body with a 7-inch bolt, and the mounting surface is provided with an uneven part for preventing slippage.Claim 4IJl Hoop wrench as described.