JPH079577U - Crimping machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pressure welding machine in which a movable chuck member can be moved in the width direction of a guide slit without rattling. [Structure] Anti-rattle means 120a, 12 for preventing rattling of movable chuck member 105 in the guide slit width direction.
0b, 105A, 200, 201 having a pressure welding machine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pressure welding machine used for joining rod-shaped metals such as reinforcing bars used in concrete structures.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, a pressure welding machine for connecting and joining a plurality of rod-shaped metals such as reinforcing bars used for concrete structures and connecting their end faces to each other has been well known (Jikken 2-8627, etc.).

5 to 7, reference numeral 101 indicates a conventional pressure welding machine. The pressure welding machine 101 includes a pressure welding machine main body 102 formed of a tubular body having a guide slit 102a at one end, a slider 103 slidably inserted in the pressure welding machine main body 102, and a pressure welding machine main body 102. A movable chuck in which a fixed chuck 104 fixed to the other end of the slider and a base 105a are fixed to one end of the slider 103, an intermediate portion 105b is fitted in the guide slit 102a, and a movable chuck 105c is provided at the tip. A member 105, a connecting portion 107 connected to the hydraulic device 106, and an extensible spring 109 provided inside the press-contacting machine main body 102 for returning the slider 103 to a desired position. Has been done.

The movable chuck member 105 has its base portion 105 a fixed to the slider 103 with its intermediate portion 105 b fitted in the guide slit 102 a of the press-contact machine body 102, and is movable to the outer end portion. A chuck 105c is provided. The movable chuck member 105 is configured to move in the axial direction of the press-contacting machine main body 102 with the intermediate portion 105b fitted in the guide slit 102a.

The fixed chuck 104 and the movable chuck 105c have the same structure except that the mounting positions thereof are different. Therefore, the structure of the movable chuck 105c will be described as a representative. The chuck comprises a reinforcing bar holding reference portion 111 forming a U-shaped recess 110 and a facing portion 113 into which a fixing screw 112 is screwed. A positioning groove 114 for positioning the reinforcing bar material is formed on the inner side surface of the reinforcing bar holding reference portion 111.

The pressure welding machine configured as described above is used for pressure welding fixation of vertically extending reinforcing bars called column reinforcing bars, and for pressure welding fixing of horizontally extending reinforcing bars called beam reinforcing bars.

FIG. 7 shows a state in which the column muscles are pressed and fixed. First, the fixed chuck 104 is caused to hold an end portion of one rebar material 118b. Next, the movable chuck 105c is caused to hold the end of the other reinforcing bar 119b. Then, with the end surface of the second reinforcing bar material 119b abutting on the end surface of the first reinforcing bar material 118b, the hydraulic device 106 is operated while heating the joint portion of the two reinforcing bar materials with the burner device 120, The moving element 103 is pushed to press the reinforcing bar material 119b against the reinforcing bar material 118b to press and fix the reinforcing bar material 119b to the reinforcing bar material 118b. In FIG. 7, reference numeral 121 denotes a bulge, which is commonly referred to as a bump, formed by press-contacting the reinforcing bar material 118a with the reinforcing bar material 119a, and 118c and 119c respectively denote unpressurized reinforcing bar materials.

[0008]

[Problems to be solved by the device]

 In the conventional pressure welding machine, the intermediate portion 105b of the movable chuck member 105 can be moved with a certain gap between the intermediate portion 105b and the guide slit 102a. Therefore, with the end of the first reinforcing bar 118b joined to the end of the second reinforcing bar 119b, the burner device 120 heats the joint between the two reinforcing bars to create the hydraulic device 106. When moving the movable chuck member 105 in the direction of the arrow by sliding the slider 103 inside the press-contact machine main body 102, the intermediate portion 105c moves to the left and right inside the guide slit 102a. It moves while swinging in the (circumferential direction of the press-contacting machine main body 102), and the amount of deviation that the movable chuck 105c swings to the left and right becomes large. That is, the end of the first rebar material 118b is held by the fixed chuck 104, and the end of the second rebar material 119b is held by the movable chuck 105c, respectively, and the second rebar material 119b is slid. Since the movable chuck 105c is held by the movable chuck 105c which is separated from the axis of the moving element 103 by the length of the intermediate portion 105b, the rattling between the slit of the slider 103 and the movable chuck 105c is increased. It will appear big. Therefore, when the end surface of the second reinforcing bar 119b is brought into contact with the end surface of the first reinforcing bar 118b, there is a problem in that the axes of the two reinforcing bars are joined to each other in a state where they are largely displaced from each other.

[0009]

[Means for Solving the Problems]

 This invention is a press-contacting machine for abutting the end faces of a pair of first and second rebar members to press and fix the two rebar members together, which is composed of a tubular body and has an axial guide slit at one end thereof. A press-contacting machine main body that is bored, and a fixed chuck that holds the end of the first reinforcing bar that is provided at the other end of the press-connecting machine main body in the same direction as the guide slit. A slider slidably fitted inside the hollow body, and a base portion fixed to the slider, an intermediate portion fits in the guide slit, and a tip end of the second rebar member A movable chuck member provided with a movable chuck for holding the portion, and by moving the movable chuck member in a direction in which the end face of the second reinforcing bar comes into contact with the end face of the first reinforcing bar, The end surface of the second reinforcing bar is brought into contact with and pressure-contacted with the end surface of the first reinforcing bar, In the end surface of the welding machine to be joined to an end face of the first reinforcing bar, in welding machine, characterized in that it has a backlash preventing means for preventing rattling of the slit width direction of the upper Symbol movable chuck member.

[0010]

[Action]

 Since this invention has the rattling prevention means for preventing rattling of the movable chuck member in the slit width direction, the swing of the movable chuck member is prevented.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1 to 3, the same components as those of the conventional configuration described with reference to FIGS. 5 to 7 are designated by the same reference numerals and the description thereof will be omitted.

A pair of guide members 120a and 120b are provided on both sides of the guide slit 102a of the press-contact machine body 102 so as to sandwich the guide slit 102a. The gap B between the guide members 120a, 120b is set to be narrower than the gap A in the width direction of the guide slit 120a, and when the intermediate portion 105b of the movable chuck member 105 moves through the guide slit 102a, the guide members 120a, 120b. The guide slit 102a of the intermediate portion 105 is prevented from rattling in the width direction. A guide hole 105A is formed in the intermediate portion 105b of the movable chuck member 105 in parallel with the axis of the slider 103. A coupling support unit composed of a bolt 200 and a nut 201 is inserted into both the guide members 120a and 120b while sandwiching the intermediate portion 105b of the movable chuck member 105 between the guide members 120a and 120b. The movable chuck member 105 is guided and moved by both guide members 120a and 120b, and the two reinforcing bars are joined and fixed in a state in which their axes coincide with each other.

As shown in FIG. 3, if a pair of guide members 220a and 220b are provided long in the axial direction of the slider 103 so as to cover the guide hole 105A, dust and the like will enter the guide hole 105A. Can be prevented, and the movement of the movable chuck member 105 is not hindered.

Another embodiment of the present invention will be described with reference to FIG. In FIG. 4, the same components as those of the conventional configuration described with reference to FIGS. 5 to 7 are designated by the same reference numerals and the description thereof will be omitted.

On the back side of the movable chuck member 105 of the press-contacting machine main body 102, a guide hole 300 is formed in parallel with the axis of the slider 103. A piece member 301 provided so as to project from the peripheral surface of the slider 103 is fitted into the guide hole 300. By moving the piece member 301 while being guided by the edge of the guide hole 300, the movable chuck member 105 moves without rattling in the width direction of the proposed slit, and the axes of the two reinforcing bars are aligned with each other. It will be fixed in the joined state.

[0016]

[Effect of device]

 Since the present invention has the rattling prevention means for preventing the movable chuck member from swinging in the slit width direction, it is possible to join both the reinforcing bars to be joined with their axes aligned.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a pressure welding machine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a partial perspective view of a pressure welding machine showing a modified embodiment of the present invention.

FIG. 4 is a partial perspective view of a pressure welding machine according to another embodiment of the present invention.

FIG. 5 is a perspective view of a conventional pressure welding machine.

FIG. 6 is a partially cutaway front view of a conventional pressure welding machine.

FIG. 7 is a perspective view showing a state in which a columnar bar is pressure-contacted and fixed using a conventional pressure-contacting machine.

[Explanation of symbols]

102 main body of pressure welding machine 102a guide slit 104 fixed chuck 103 slider 105 movable chuck member 120a, 120b, 220a, 220b guide member 105A guide hole 200 bolt 201 nut 301 piece member 300 guide hole

Claims (4)

[Scope of utility model registration request] 1. A pressure welding machine which presses and fixes both end faces of a pair of first and second reinforcing bars by pressing them together, and is composed of a cylindrical body, and has an axial guide slit at one end thereof. A perforated press-contacting machine main body, a fixed chuck that holds the end portion of the first reinforcing bar provided at the other end of the press-contacting machine main body in the same direction as the guide slit, and the hollow body. A slider slidably fitted inside, and a base portion fixed to the slider, an intermediate portion fitted to the guide slit, and an end portion of the second rebar member held at the tip. And a movable chuck member provided with a movable chuck for moving the movable chuck member in a direction in which the end surface of the second reinforcing bar comes into contact with the end surface of the first reinforcing bar.
In the pressure welding machine for contacting and pressing the end surface of the first reinforcing bar material to the end surface of the first reinforcing bar material, and joining the end surface of the second reinforcing bar material to the end surface of the first reinforcing bar material, the slit width of the movable chuck member A pressure welding machine having a rattling prevention means for preventing rattling in a direction. 2. The guide means is fixed to the movable chuck, and is provided on a piece member projecting outward from the peripheral surface of the movable chuck and on the outer periphery of the press-contacting machine main body. 2. A guide hole which is fitted to each other and guides the piece member to move in a direction in which the end surface of the second reinforcing member comes into contact with the end surface of the first reinforcing member. The pressure welding machine described. 3. The guide means is fixed to the press-contacting machine main body, and sandwiches and guides the intermediate portion of the movable chuck in a direction in which the end surface of the second reinforcing bar contacts the end surface of the first reinforcing bar. The crimping machine according to claim 1, wherein the crimping machine comprises a pair of guide members. 4. The guide means is fixed to the press-contacting machine main body, and sandwiches and guides the intermediate portion of the movable chuck in a direction in which the end surface of the second reinforcing bar contacts the end surface of the first reinforcing bar. A pair of guide members, a guide hole that is provided in the intermediate portion, and that guides the intermediate portion to move in a direction in which the end surface of the second reinforcing bar member contacts the end surface of the first reinforcing bar member, The pressure welding machine according to claim 1, wherein the pressure welding machine is configured by a connecting member that connects the guide members in a state where the intermediate portion is held inside the guide members.