JPH0239730Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention brings a workpiece such as a power tool into contact with an abrasive tool such as an abrasive belt at a constant contact pressure, and the workpiece to be polished is continuously machined. Concerning a constant pressure self-copying type polishing machine.

[Conventional technology]

For example, among work tools, parts such as spanners and pliers are formed by forging, so there are large variations in thickness, etc. Furthermore, since these parts are generally heat treated, they may warp or bend, resulting in dimensional variations. It is necessary to perform polishing treatment to cope with such variations and to finish the surface to a predetermined level. Many prototype polishing machines have been manufactured, but most have been abandoned due to their inability to accommodate variations in component dimensions. That is, with conventional polishing machines, it has not been possible to continuously polish workpieces having variations with a constant contact pressure.

As a means to solve these problems, Japanese Utility Model Publication No. 46-23668 proposes that an operating rod is attached horizontally to the support member of the polishing machine, a motor mounting plate is attached to one end of the operating lever, and a motor mounting plate is attached to one end of the operating lever. One end of the wire is fixed to each end, a metal fitting is separately attached to the main body, a weight whose position can be adjusted is provided on one arm of the metal fitting, and the other end of the wire is fixed to the end of the other arm of the metal fitting, and the operating rod is A polishing pressure adjusting device has been proposed in which a prevention rod for restricting rotation is provided within the rotation range.

[The problem that the idea aims to solve]

In the prior art, the polishing head is balanced with the weight via a plurality of pulleys, so
There was a problem that the copying operation was not smooth and precise polishing was not possible. Furthermore, in the prior art, the parts of the workpiece that do not need to be polished are manually polished, so there is a problem in that the work efficiency is low.

[Means to solve the problem]

The present invention includes a guide installed upright on a base, a pulley having a small-diameter part and a large-diameter part rotatably provided on the upper part of an upright rod behind the guide, and a pulley that is provided so as to be movable up and down along the guide. A polishing head including a motor-driven polishing tool and connected to the small diameter portion via a first wire, and a second polishing head connected to the large diameter portion.
a weight connected via a wire rod, an endless conveyor horizontally installed in front of the base, a workpiece conveyance table fixed to the endless conveyor at predetermined intervals, and a workpiece conveyor fixed to the conveyor table fixed to the The polishing apparatus includes a guide member that protrudes in correspondence with a portion of the workpiece that does not require polishing, and a roller that is attached to the polishing head and is slidable on the guide member.

[Effect]

With the above configuration, the polishing head and the weight are almost directly connected through the small diameter part and the large diameter part of the pulley, so that the copying operation can be performed smoothly. Further, when the roller is guided by the guide member, the abrasive part can be automatically separated from the workpiece.

〔Example〕

Next, embodiments of the present invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 3, a polishing head 2 equipped with an abrasive belt 1 is moved by a weight 3.
An endless conveyor 7 is fitted with a conveyor table 15 which is slidably installed on a guide pole 5 which is a guide installed upright on a base 4, and which is balanced so that the load is applied to the sides, and a conveyor table 15 is equipped with a mounting jig 6 for the workpiece a. It is provided below the polishing belt 1.

More specifically, the polishing head 2 is provided with a power pulley 8a connected to a motor 8, a guide pulley 9, and an elastic contact pulley 10 below the pulleys 8a, 9. , 10 are provided with a polishing helt 1. A bush 11 is provided at the center of the polishing head 2 and a guide hole is formed therein, and the polishing head 2 is slidably provided on a guide pole 5 erected on a base 4. Also base 4
A pulley 1 is attached to the upper end of the standing rod 12 provided at the rear of the
3 is pivoted, and the small diameter portion 13a of this pulley 13
and the polishing head 2 are connected by a first wire rod 14a, and a weight 3 is connected to the large diameter portion 13b of the pulley 13 via a second wire rod 14b. A small portion 13a and a large diameter portion 13b are provided to balance the weight 3 and the weight required for polishing.

Further, on the endless conveyor 7, transport tables 15 for the workpieces a are arranged at predetermined intervals, and on the upper surface of the transport stand 15, a mounting jig 6 for fixing the workpieces a is provided. Reference numeral 19 in the drawing is a relief device for the part of the polishing head 2 that does not need to be polished when polishing a product that has a part that does not need to be polished. A plate cam 1, which is a guide member, is placed near the polishing head 2 of the mounting jig 6.
9a, and a roller 1 that engages with the plate cam 19a near the endless conveyor 7 of the polishing head 2.
9b. Reference numeral 20 designates a stopper for limiting the downward movement of the polishing head 2, which is provided with a threaded rod 20 and a nut 20b at the bottom of the polishing head 2, while a restraining surface 20c is provided on the base 4.

Next, the transport table 15 and the mounting jig 6 for fixing the workpiece a will be described in detail. The one in FIG. 4 equalizes the wear of the abrasive belt 1, and the workpieces a on the conveyor table 15 arranged on the endless conveyor 7.
A mounting jig 6 for fixing the transport table 15 is provided so as to be offset in the width direction from the center of the conveyor table 15 in stages. The one in Figure 5 prevents the area near the boundary from being polished due to a difference in level when a pair of work tools such as pliers are combined.
A notch 16a is formed inside one side of the conveyance table 15, and a pin 16b is provided in the longitudinal direction inside the notch 16a.
A vertically arranged block 16 is provided with a pair of pin-like positioning pins 17 on the left and right sides near the other side,
A positioning pin 17a is also provided at the pivot hole position of the workpiece a, which is the pliers. The one shown in FIG. 6 is for a double-ended spanner, and has pins 18 erected on both sides of the conveyor table 15, with which the double-ended openings of the spanner, which is the workpiece a, engage.

Then, as shown in FIG. 5, a pair of plier parts, which is the workpiece a, is placed. In this case, the tip of the pliers part is held in the notch 16a so as to sandwich the pin 16b, the pivot hole of the pliers part is inserted into the pin 17a, and the handle part of the pliers part is further sandwiched and fixed between the positioning parts 17.
The workpiece a is thus fixed on the conveyor table 15, and the endless conveyor 7 is started. In this case, it is not necessary to use the block 16, and the positioning 17,
Only 17a may be used.

Next, by driving the motor 8 of the polishing head 2, the polishing helper 1 is started, and the contact pulley 10 contacts the workpiece a via the polishing head 1, following the surface of the workpiece a.

Workpiece a and contact pulley 10 in this case
Since the contact pressure p is balanced around the pulley 13, the following equation is obtained.

Wl + pAl = WL p = 1/Al (WL - wl) where w is the total weight of the head 2 l is the length of the arm between the center of gravity of the head 2 and the small diameter part 13a p is the contact pressure between the endless conveyor 7 and the workpiece a A is the endless Contact area between the conveyor 7 and workpiece a W is the weight of the weight 3 L is the length of the arm between the weight 3 and the large diameter portion 13b Therefore, if the above (WL-wl) is made positive and the value is decreased, contact will occur. The pressure p can be adjusted to a small value.

In addition, for the parts of workpiece a that do not require polishing, the roller 19b contacts the plate cam 19a set higher than workpiece a, and prevents the roller 19b from descending below the height of the plate cam 19a, so that workpiece a cannot be polished. Not done. Furthermore, the lower end of the threaded rod 20a hits the restraining surface 20c to prevent it from falling.

As described above, in the embodiment described above, the polishing head 2 is connected to the small diameter portion 13a of the pulley 13 via the first wire 14a, and the polishing head 2 is connected to the large diameter portion 13b via the second wire 14b. By connecting the weight 3, the weight 3 can be directly connected to the polishing head 2, that is, play in the connection between the two can be eliminated, smoothing the tracing operation, and precise polishing work can be performed. Further, the conveyor table 15 is provided with a plate cam 19a serving as a guide member corresponding to the portion of the workpiece a that does not require polishing, and the polishing head 2 is provided with a roller 19b that is slidable on the plate cam 19a. Then,
The polishing head 1 automatically avoids parts of the workpiece that do not require polishing, allowing efficient polishing work.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, the number of heads may be increased to perform polishing from rough machining to finishing machining by setting workpiece a at one time. It goes without saying that various modifications, such as, are included within the scope of the gist of the present invention.

[Effect of idea]

This invention connects the polishing head and the weight through the small diameter part and large diameter part of the pulley, making it possible to perform smooth copying operation and precise polishing. In addition, the polishing head is provided with a roller that slides on the guide member so that the polishing head automatically avoids the portions that do not require polishing, so that work efficiency can be greatly improved.

[Brief explanation of the drawing]

Figure 1A is an overall front view, Figure 1B is a side view of the same,
Figure 2 is a sectional view of the main parts, Figure 3 is a sectional view of the plate cam, Figure 4 is the arrangement of the conveyor table, Figure 5 is a plan view of the pliers attachment jig, and Figure 6 is the wrench attachment jig. FIG. 1... Polishing belt (polishing tool), 2... Polishing head, 3... Weight, 4... Base, 5... Guide pole (guide), 7... Endless conveyor, 8... Motor, 12... Standing rod, 13...Pulley, 1
3a...small diameter part, 13b...large diameter part, 14a...
First wire rod, 14b...Second wire rod, 15...Transportation table, 19a...Plate cam (guiding member), 19b...
...roller, a...workpiece.

Claims (1)

[Scope of utility model registration request] A guide installed upright on the base, a pulley having a small diameter part and a large diameter part rotatably installed on the upper part of an upright rod installed behind the guide, and a motor installed along the guide to be able to move up and down. a polishing head including a driving polishing tool and connected to the small-diameter portion via a first wire; a weight connected to the large-diameter portion via a second wire; and a weight installed horizontally in front of the base. an endless conveyor, a workpiece conveyance table fixed to the endless conveyor at predetermined intervals, a guide member fixed to the conveyance table and protruding in correspondence with a portion of the workpiece that does not require polishing; 1. A constant pressure self-copying type polishing machine, comprising a roller attached to a polishing head and slidable on the guide member.