JP4833013B2 - Extension protection device and installation structure of the extension protection device - Google Patents

Description

  The present invention relates to an expansion / contraction protection device and an installation structure of the expansion / contraction protection device, and more specifically, used to protect machine movable parts that are components of machine tools, industrial machines, and the like from moisture, oil, facets, dust, and the like. The present invention relates to an expansion / contraction protection device and an installation structure of the expansion / contraction protection device.

  In many machine tools and industrial machines, a rectilinear drive system that linearly drives in the X-axis direction and / or the Y-axis direction and further in the Z-axis direction is often used as a component. For example, in a machine tool, a machining head having a cutting tool for cutting a workpiece, a nozzle for irradiating a laser beam, or the like is a constituent element, and these constituent elements are the X-axis direction and / or the Y-axis direction, and further Z Driven straight in the axial direction. By the way, on both the left and right sides and / or the top and bottom sides of such a machining head, expansion / contraction protection devices for protecting the straight drive system from moisture, oil, facets or dust used in machining by the machining head are arranged. . For example, the expansion / contraction protection device shown in FIG. 8 is installed in a machine movable unit (not shown).

  The expansion / contraction protection device 100 includes a bellows sheet 101 in which a plurality of peak portions 101a bent to the front side and valley portions 101b bent between the peak portions 101a are alternately formed, A plurality of slats 102 having a protective plate part 102b covering the front surface of the bellows sheet 101 and a mounting plate part 102a formed on the base end side, and fixed to the back surface 101c of the bellows sheet 101 and attached to the slats 102 The slat fixing plate 103 sandwiches a part of the bellows sheet 101 with the plate portion 102a. Further, the protection plate portion 102 b of the slat 102 extends from the front side of the slat fixing plate 103 through the front surface of the next layer slat fixing plate 103.

  Then, the interval between the slat fixing plates 103 is lowered from the extended state shown in FIG. 8A to the shortened state shown in FIG. 8B by lowering the uppermost slat fixing plate 103 (not shown). The peak portions 101a and valley portions 101b of the bellows sheet 101 are narrowed, and the overall length of the expansion / contraction protection device 100 is shortened. Further, by raising the interval between the slat fixing plates 103 from the extended state shown in FIG. 8 (b) to the uppermost slat fixing plate 103 (not shown) to the extended state shown in FIG. 8 (a), The peak portion 101a and the valley portion 101b of the bellows sheet 101 are widened, and the entire length of the expansion / contraction protection device 100 is extended.

  However, in the expansion / contraction protection device 100 according to the prior art, a portion (clamping portion) of the bellows sheet 101 sandwiched between the mounting plate portion 102a constituting the slat 102 and the slat fixing plate 103 is shown in FIG. Thus, since it is in the vicinity of each mountain portion 101a, the valley portion 101b of the bellows sheet 101 protrudes to the back side from the slat fixing plate 103, particularly in the state where the overall length shown in FIG. The amount of protrusion is maximized. However, since the components of the rectilinear drive system are accommodated on the back side of the slat fixing plate 103, when the valley 101b of the bellows sheet 101 protrudes as described above, the valley 101b of the bellows sheet 101 is projected. May interfere with the components of the rectilinear drive system, and the degree of freedom in designing the back side of the expansion / contraction protection device is greatly restricted, and the capacity of the rectilinear drive system must be increased more than necessary. It was.

  Therefore, the present invention has been proposed to solve the problems of the above-described conventional expansion / contraction protection device, and the bellows sheet and the slat are fixed in any case where the expansion / contraction protection device expands / contracts. An object of the present invention is to provide an expansion / contraction protection device and an installation structure thereof in which a bellows sheet or the like does not protrude on the back surface of the slat fixing plate, and the accommodation volume on the back surface side of the linear drive system can be increased.

To achieve the above object, telescopic protection device according to the first invention (the invention according to claim 1) includes a sheet member crest and valleys are alternately formed, the upper xylene over preparative member A plurality of protective plates that cover the front and a mounting plate formed on the base end side of the protective plate, and are fixed at equal intervals from one end of the sheet member to the other. and slats, and a slat fixing plate for clamping a portion of said sheet member together with the fixed comprising a rear with mounting plate portion constituting the respective slat of the sheet member, said slats fixed plate and the mounting plate The portion formed by sandwiching the sheet member by the portion is in the vicinity of each valley portion, and when the sheet member is contracted, each mountain portion formed on the sheet member causes each slat to Between the protective plate and the protective plate Those characterized by comprising configured to dynamic.

  In the first invention, the sheet member is sandwiched between the slat fixing plate and the mounting plate portion that constitutes the slat. When the reduction operation is performed through the portion, each mountain portion is bent and moved between the front side, that is, between the protection plate portion and the protection plate portion of the slat, while the valley portion is on the back side of the sheet member. Do not move. Therefore, according to the expansion / contraction protection device according to the present invention, the degree of freedom in designing the mechanical device can be increased without impairing the space on the back side of the expansion / contraction protection device.

  The expansion / contraction protection device extends and contracts in the vertical direction when protecting the front surface of the linear drive system in which the machine movable unit moves up and down, but protects the upper surface or side surface of the linear drive system in which the machine movable unit moves horizontally. As in the case of doing so, it may expand and contract in the horizontal direction.

  The second invention (the invention according to claim 2) is characterized in that the sheet member is stitched on both sides of the top of the mountain portion.

  In the second aspect of the invention, even when the expansion / contraction operation of the expansion / contraction protection device is repeated for a long period of time, or when liquid or the like adheres to the sheet member, the above-mentioned sewing is always performed when the expansion / contraction protection device is reduced. The sheet member is bent to the front side of the sheet member and is not bent at an irregular portion.

  A third invention (invention according to claim 3) relates to the installation structure of the expansion / contraction protection device, and one end of the expansion / contraction protection device according to the first or second invention is provided in the machine movable part. It is fixed and the other end is a free end, and when the machine movable part moves in a direction in which the expansion / contraction protection device contracts, the other end side of the expansion / contraction protection device is guided to the back side. The other end side guide member is provided.

  In this third invention, when the machine movable part moves to the other end side of the expansion / contraction protection device, the other end side of the expansion / contraction protection device is guided to the back side of the expansion / contraction protection device by the other end side guide member, It is not reduced in the moving direction of the machine movable part. Therefore, according to the third aspect of the present invention, the moving range of the machine movable portion can be made longer than the installation structure of the type of expansion / contraction protection device that is reduced on the other end side of the expansion / contraction protection device. In other words, according to the present invention, the expansion / contraction protection device at the time of reduction does not restrict the movable range of the machine movable part, and as a result, the machine tool and the industrial machine including the machine movable part are made compact. It becomes possible.

  The distance by which the other end side of the expansion / contraction protection device is guided by the other end side guide member to the back side of the expansion / contraction protection device can be freely designed according to the structure of the machine or device in which the expansion / contraction protection device is installed. The distance does not necessarily have to be the length when the expansion / contraction protection device is extended, and may be, for example, a distance that is half the length when the expansion / contraction protection device is extended. When such a distance is set, the expansion / contraction protection device is reduced within the length of the other end side guide member, and most of the reduced expansion / contraction protection device moves to the back side, It will not be visible from the front side.

  Moreover, the installation structure of the expansion / contraction protection device according to the fourth invention (invention according to claim 4) is such that both ends of each slat constituting the expansion / contraction protection device according to claim 1 or 2 are formed of the sheet member. Projecting from both ends, both ends of each slat fixing plate projecting from both ends of the sheet member, and located slightly on the center side of the slats from both ends of the slats, constituting each slat A gap is formed between the protective plate portion to be projected and the projecting portion of the slat fixing plate, and when the expansion / contraction protection device moves in accordance with the movement of the machine movable portion, the clearance of the slat fixing plate is formed in the gap. A slat guide member for guiding both sides is arranged.

  In the fourth aspect of the invention, when the expansion / contraction protection device moves along with the movement of the machine movable part, since it is guided by the slat guide member, even if the machine movable part moves at high speed, The expansion / contraction protection device can be moved in a stable state without any irregular operation.

  In the first aspect of the invention, the sheet member is sandwiched between the slat fixing plate and the mounting plate part that constitutes the slat, and is near the troughs, so that the sheet member passes through the crests and troughs. When the reduction operation is performed, each peak portion is bent and moved between the front side, that is, between the protection plate portion and the protection plate portion of the slat, while the trough portion does not move to the back side of the sheet member. In addition, it is possible to increase the degree of freedom in designing the mechanical device without affecting the space on the back side of the expansion / contraction protection device, and it is possible to reduce the size of the mechanical element accommodating portion on the back side of the expansion / contraction protection device.

  In the second invention, since the sheet member is stitched on both sides of the top of the mountain portion, when the expansion / contraction operation of the expansion / contraction protection device is repeated for a long period of time, or liquid adheres to the sheet member. Even in this case, when the expansion / contraction protection device is reduced, it is always bent to the front side of the sheet member via the stitched portion, and is not bent at an irregular portion.

  In the third invention, when the machine movable portion moves to the other end side of the expansion / contraction protection device, the other end side of the expansion / contraction protection device is guided to the back side of the expansion / contraction protection device by the other end side guide member. Since it is not reduced in the moving direction of the machine movable part, the movement end position of the machine movable part to the other end side of the expansion / contraction protection device is not limited.

  In the fourth aspect of the invention, when the expansion / contraction protection device moves along with the movement of the machine movable part, it is guided by the slat guide member, so even if the machine movable part moves at a high speed, The protective device can be moved in a stable state without any irregular operation, and the speed of the mechanical device can be increased.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. As shown in FIG. 3, the expansion / contraction protection device 1 according to this embodiment is formed on a sheet member 5, a protection plate portion 6b that covers the front surface 5a of the sheet member 5, and a proximal end side of the protection plate portion 6b. And a plurality of slats 6 fixed to the front surface 5a of the sheet member 5 from the one end 5c to the other end 5d shown in FIG. And a slat fixing plate 7 that sandwiches the fixing portion of the sheet member 5 with the mounting plate portion 6a of each slat 6.

  First, the shape of each element provided in the expansion / contraction protection device 1 will be described. The sheet member 5 is made of a composite sheet material made of an oil-resistant, flame-retardant, and soft synthetic resin material, and a plurality of peaks 5e are formed on the left front surface 5a shown in FIG. 3 from one end 5c shown in FIG. It is formed at equal intervals over the other end 5d, and stitched portions 5g on both sides of the peak portion 5e at the top shown in FIG. 3 are stitched. These stitching portions 5g are sewn over the entire width from the left end 5h to the right end 5j of the sheet member 5 shown in FIG. 1, and are formed at equal intervals from one end 5c to the other end 5d. Further, in this sheet member 5, rivet holes (reference numerals are omitted) through which rivets 8 described later are inserted correspond to the rivets 8, 8, 8, 8 shown in FIG. 1 between the left end 5h and the right end 5j. It is formed in each place.

  The plurality of slats 6 covering the front surface 5a of the sheet member 5 are made of thin plate-like stainless steel, and the mounting plate portion 6a having a horizontal cross section in FIG. The protective plate 6b is bent substantially downwardly at an angle that is slightly more open and the lower end is slightly bent to the back side, and is formed in a substantially hanging shape. One protective plate portion 6b of these slats 6 has a width extending from the left end 6c and the right end 6d protruding from the left end 5h and the right end 5j of the sheet member 5 shown in FIG.

  The other mounting plate portion 6a has a width cut more than that of the protective plate portion 6b, and has the same width as the left end 5h and the right end 5j of the sheet member 5, from the cut left end 6e shown in FIG. 6 to the cut right end 6f. It is formed over. Further, rivet holes (reference numerals are omitted) through which rivets 8 to be described later are inserted in the mounting plate portions 6a of these slats 6 are shown in FIG. 1 between the cut left end 6e and the cut right end 6f shown in FIG. , 8, 8, and 8 respectively.

  The plurality of slat fixing plates 7 fixed to the back surface 5b of the sheet member 5 are each formed in a rectangular shape as shown in FIG. It protrudes and is formed from the left end 7a to the right end 7b shown in FIG. 6 which is slightly on the center side of the slat 6 rather than the left end 6c and the right end 6d of the protection plate portion 6b of the slat 6 shown in FIG. In these slat fixing plates 7, rivet holes 7c through which rivets 8 described later are inserted are formed at four positions corresponding to the rivets 8, 8, 8, 8 shown in FIG. 1 between the left end 7a and the right end 7b. Yes.

  Next, an embodiment according to the expansion / contraction protection device 1 constituted by these elements will be described. On the back surface 5b of the sheet member 5 shown in FIG. 3, the slat fixing plates 7 are arranged at equal intervals from one end 5c to the other end 5d of the sheet member 5 shown in FIG. 1 or FIG. The attachment plate portion 6a of the slat 6 is in contact with the front surface 5a of the sheet member 5 at these contact portions so as to sandwich the sheet member 5, and is tightened by the four rivets 8. The contact portions of the sheet member 5 are sandwiched by the attachment, and the attachment plate portion 6a of the slat 6 is fixed to the slat fixing plate 7, respectively. In addition, the fastening of each element by the four rivets 8 can be fastened by, for example, a screw member or the like.

  One protective plate portion 6b of the slat 6 is formed from the left end 6c protruding from the left end 5h and the right end 5j of the sheet member 5 shown in FIG. 1 to the right end 6d, and the other mounting plate portion 6a is The width is the same as that of the left end 5h and the right end 5j of the sheet member 5 cut from the protective plate 6b, and is formed from the cut left end 6e to the cut right end 6f shown in FIG. Further, the slat fixing plate 7 protrudes from the left end 5h and the right end 5j of the seat member 5 shown in FIG. 1 respectively, and is slightly more slat than the left end 6c and the right end 6d of the protection plate portion 6b of the slat 6 shown in FIG. 6 are formed from the left end 7a to the right end 7b shown in FIG. Since a gap is formed between the protective plate 6b of the slat 6 shown in FIG. 6 and one side surface 7d of the slat fixing plate 7, a linear guide 15a or a curved guide of the guide plate 15 described later is formed in this gap. By inserting the portion 15c, the expansion / contraction protection device 1 is guided so as to move straight up or down.

  As described above, the expansion / contraction protection device 1 to which each element is fixed by fastening the four rivets 8 is a slat fixing plate fixed to the back surface 5b of the sheet member 5 in the extended state shown in FIG. 7 has a substantially horizontal posture with one side 7d on the front side and the other side 7e on the back side, and the lower surface of the upper slat fixing plate 7 and the upper surface of the lower slat fixing plate 7 face each other at a predetermined interval. Arranged hierarchically. This is because the other side surface 7e of the lower slat fixing plate 7 is caused by the tension of the sheet member 5 extended from one side surface 7d of the upper slat fixing plate 7 to the other side surface 7e of the lower slat fixing plate 7. The protective plate portion 6b of the slat 6 has a lower end portion that extends downward from the mounting plate portion 6a of the lower slat 6, and the lower end or lower end portion of the lower slat 6 is the lower portion of the lower plate. Since it is formed so as to contact the front surface of the protection plate portion 6b of the slat 6, the slat fixing plate 7 is maintained in a substantially horizontal posture with almost no displacement in the vertical direction. The front surface 5a of the sheet member 5 is covered with the slats 6 that are in contact with each other and superpose.

  Further, in the extended state shown in FIG. 3, the expansion / contraction protection device 1 is formed with valleys 5f between the peaks 5e and 5e of the sheet member 5, and the peaks 5e and valleys 5f are defined as follows. It is formed alternately. Then, when the expansion / contraction protection device 1 is reduced by the movement of the machine movable portion (not shown) from this extended state, the distance between the slat fixing plate 7 and the slat fixing plate 7 is reduced as shown in FIG. The peak portion 5e of the sheet member 5 moves flexibly between the front side, that is, between the protection plate portion 6b and the protection plate portion 6b of the slat 6, while the trough portion 5f is formed on the back side of the sheet member 5 (slats). It does not move to the rear side of the other side surface 7e of the fixing plate 7. When the expansion / contraction protection device 1 is further reduced from this state, the peak portion 5e of the sheet member 5 is accommodated between the protection plate portion 6b and the protection plate portion 6b of the slat 6, as shown in FIG. On the other hand, the valley 5f does not move to the back side of the sheet member 5.

  Next, functions and effects of the above-described expansion / contraction protection device 1 will be described. As shown in FIG. 3, the sheet member 5 is sandwiched between the slat fixing plate 7 and the mounting plate portion 6a constituting the slat 6, and is located near each valley portion 5f. When the reduction operation is performed through the portion 5e and the valley portion 5f, the stitched mountain portion 5e is bent and moved between the front side, that is, between the protection plate portion 6b and the protection plate portion 6b of the slat 6. On the other hand, the valley portion 5 f does not move to the back surface 5 b side of the sheet member 5. Therefore, according to the expansion / contraction protection device 1 according to the present invention, the space on the back surface 5b side of the expansion / contraction protection device 1 is not affected, and the degree of freedom in designing the mechanical device can be increased.

  Further, in the extended state shown in FIG. 3, the upper layer slat fixing plate 7, the lower layer slat fixing plate 7, and the extended sheet member 5 form a Z-shape so that the slat can be obtained by lever action. The front surface of the slat 6 of the next layer can be pressed by the lower end portion of the 6 to improve confidentiality. That is, the side surface 7d side of each slat fixing plate 7 serves as a fulcrum for lever action, and a load due to the tension of the sheet member 5 is applied upward to the force point on the other side surface 7e of the slat fixing plate 7, and the reaction force is applied to the slat It acts on the action point of the front end of the mounting plate portion 6a of the slat 6 fixed to the fixed plate 7, and by this reaction force, the lower side of the protective plate portion 6b of the slat 6 presses the front surface of the slat 6 of the next layer.

  Next, an embodiment according to the installation structure of the expansion / contraction protection device will be described. FIG. 7 is a cross-sectional view showing an example installed on the main spindle movable part of the machine tool, and the main spindle head 4 is moved up and down by a vertical drive means (not shown). A tool holder 12 for mounting a processing tool is rotatably mounted on the front surface of the bearing body 11 of the spindle head 4, and a first expansion / contraction protection device 2 to be described later is installed on the upper surface via a fixed base 13. The second expansion / contraction protection device 3 is installed on the lower surface. In addition, since each component of these 1st expansion-contraction protection apparatus 2 and the 2nd expansion-contraction protection apparatus 3 is the same structure as the expansion-contraction protection apparatus 1 mentioned above, detailed description of each element is abbreviate | omitted and the same This will be described with reference numerals.

  First, in the first expansion / contraction protection device 2 installed above the spindle head 4, the uppermost end slat fixing plate 7 is attached to a frame body portion of a machine tool (not shown) near the rising end where the spindle head 4 rises. The lowermost slat fixing plate 7 is fixed to a front end of the sheet member 5 extended from the lowermost slat fixing plate 7 with a mounting plate 14 having substantially the same length as the slat fixing plate 7 (see FIG. 2), the mounting plate 14 is fixed to the fixing base 13 by fastening with a screw member (not shown).

  In addition, two guide plates 15 are suspended downward from the left and right (the front and back direction in FIG. 7) of the first expansion / contraction protection device 2 on the left and right, which are the slat guide members of the present invention. The straight guide portions 15a of the guide plates 15 and 15 are inserted into a gap formed between the protective plate portion 6b of the slat 6 shown in FIG. 6 and one side surface 7d of the slat fixing plate 7, and this gap will be described later. By inserting the straight guide 15a of the guide plate 15 to be guided, the first expansion / contraction protection device 2 is guided so as to move straight up and down. The fixing portions 15b of the guide plates 15 and 15 are fixed to a frame body portion of a machine tool (not shown).

  Next, as shown in FIG. 7, the second expansion / contraction protection device 3 installed above the spindle head 4 has the uppermost slat fixing plate 7 fixed to a mounting plate 17 (see FIGS. 2 and 6). The mounting plate 17 is fixed to the lower surface of the bearing body 11 by fastening with a screw member (not shown), and the lower end portion is stored on a storage receiving member 19 described later. The rear end portion of the storage receiving member 19 is attached to the lower surface side of the partition plate 18 installed below the spindle head 4, and between the illustrated left side of the partition plate 18 and the illustrated left side of the storage receiving member 19. In addition, an opening (reference numeral is omitted) into which components such as the respective sheet members 5, slats 6, and slat fixing plates 7 of the second expansion / contraction protection device 3 can be inserted is formed. The surface is formed into a curved surface.

  Further, a bent guide portion (the other end side guide member of the present invention) 15c starting from a position substantially the same height as the partition plate 18 is formed at the lower end portion of the guide plate 15 that is continuous with the straight guide portion 15a. The curved surface of the advance guide portion 15 c is parallel to the inner peripheral curved surface of the storage receiving member 19, and the rear end portion thereof is fixed to the partition plate 18 together with the storage receiving member 19.

  Then, when the spindle head 4 is lowered, the first expansion / contraction protection device 2 causes the protection plate portion 6b of the slat 6 and one side surface of the slat fixation plate 7 shown in FIG. Guided by the straight guide portion 15a of the guide plate 15 inserted in a gap formed between the guide plate 7d and the guide plate 15 descends. At the same time, the second expansion / contraction protection device 3 is guided and lowered by the rectilinear guide portion 15a of the guide plate 15 while the interval between the slat fixing plates 7 is sequentially reduced. When the lower end side bending guide portion 15c is reached, the lower end side of the second expansion / contraction protection device 3 is bent from the opening between the partition plate 18 and the storage receiving member 19 to the inside thereof. Guided by the guide portion 15c and the storage receiving member 19 are sequentially stored on the back side.

  When the spindle head 4 is lifted, the first expansion / contraction protection device 2 is lifted while being guided by the rectilinear guide portion 15a of the guide plate 15 while the interval between the slat fixing plates 7 is sequentially reduced. At the same time, the second expansion / contraction protection device 3 is guided and raised by the straight guide portion 15a or the curved guide portion 15c of the guide plate 15 while the interval between the slat fixing plates 7 is sequentially enlarged. At the same time, the second expansion / contraction protection device 3 at the lower end reaches the linear guide portion 15a from the curved guide portion 15c of the guide plate 15 and rises sequentially.

  It should be noted that the guide plate 15 constituting the installation structure of the expansion / contraction protection device described above is a surface that guides the expansion / contraction protection device 3 and / or a surface that the storage receiving member 19 guides / supports the expansion / contraction protection device 3 to the back side, or these The slat fixing plate 7 or the front surface of the slat 6 that is in sliding contact with the surface of the slat is subjected to a surface treatment that reduces the sliding contact resistance between the slat fixing plate 7 and the guide plate 15 or the sliding contact resistance between the slat 6 and the storage receiving member 19. May be. For example, Teflon (Ei Dupont Dou Nemour, It is also possible to use a coating with a registered trademark of And Company. By applying such a surface treatment to each of the above surfaces, a large tensile force or sliding friction that repeatedly acts on the sheet member 5 (particularly, the portion where the slat fixing plate 7 is fixed) when the machine movable part moves at high speed. It is possible to effectively suppress cutting by force or generation of a large sliding contact sound.

  Next, the operation and effect relating to the installation structure of the expansion / contraction protection device described above will be described. When the first and second expansion / contraction protection devices 2 and 3 move along with the movement of the spindle head 4, they are guided by the straight guide part 15a or the curved guide part 15c of the guide plate 15 which is a slat guide member. Therefore, even when the spindle head 4 moves at a high speed, each of the expansion / contraction protection devices 2 and 3 can be moved in a stable state without any irregular operation.

  When the spindle head 4 moves to the lower end side of the second expansion / contraction protection device 3, the lower end side of the second expansion / contraction protection device 3 is moved to the second expansion / contraction protection device by the curved guide portion 15 c of the guide plate 15. 3 and is not reduced in the moving direction of the spindle head 4. Therefore, the moving range of the spindle head 4 can be made longer than the installation structure of the extension protection device of the type reduced at the lower end side of the second extension protection device 3.

  In the embodiment of the expansion / contraction protection device according to the present invention, the movement direction of the expansion / contraction protection device and the machine movable part in which the expansion / contraction protection device is installed is configured to move up and down. It can also be configured for horizontal movement. Further, in the embodiment related to the installation structure of the expansion / contraction protection device, the guide portion of the guide plate which is the slat guide member is configured by the straight guide portion and the new song guide portion. A configuration consisting of only parts is also possible.

It is a front view which shows the whole expansion-contraction protection apparatus which concerns on embodiment of this invention. It is a right view of FIG. FIG. 3 is a partially enlarged view of FIG. 2, showing an extended state of the expansion / contraction protection device. The form in the middle of the expansion-contraction protection apparatus shown in FIG. 3 shrinking is shown. The expansion-contraction protection apparatus shown in FIG. 4 shows the form which further reduced. FIG. 2 is a top view of FIG. 1. It is sectional drawing which shows embodiment in the main-axis movable part of a machine tool. It is sectional drawing of the expansion-contraction protection apparatus which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Expansion / contraction protection apparatus 5 Sheet member 5a Front surface 5b Back surface 5c One end 5d Other end 5e Mountain part 5f Valley part 5g Sewing part 6 Slat 6a Mounting plate part 6b Protection plate part 7 Slat fixing plate 15 Guide plate 15 Straight guide part 15c Curved guide Part 19 Storage receiving member

Claims (4)

Sheet members in which peaks and valleys are alternately formed ;
A protective plate which covers the front of the upper xylene over preparative member, it and a mounting plate portion formed on the base end side of the protective plate, or the like over from one end to the other end of the sheet member A plurality of slats fixed at intervals;
A slat fixing plate that is fixed to the back surface of the sheet member and holds a part of the sheet member together with a mounting plate portion that constitutes each slat;
With
Site made by sandwiching the sheet member by the above slats fixed plate and the mounting plate portion, as well as a vicinity of the respective valley, when the sheet member is operated shrinking, formed in the sheet member An expansion / contraction protection device, wherein each mountain portion is configured to move between a protection plate portion and a protection plate portion constituting each of the slats .   The expansion / contraction protection device according to claim 1, wherein the sheet member is stitched on both sides of the top of the peak.   One end of the expansion / contraction protection device according to claim 1 or 2 is fixed to the machine movable part, and the other end is a free end, and the machine movement part reduces the expansion / contraction protection apparatus. A structure for installing an expansion / contraction protection device, comprising an other end side guide member that guides the other end side of the expansion / contraction protection device to the back side when moved in a direction. Both ends of each slat constituting the expansion / contraction protection device according to claim 1 or 2 protrude from both ends of the sheet member, and both ends of each slat fixing plate protrude from both ends of the sheet member. And a gap is formed between the protective plate portion constituting each of the slats and the protruding portion of the slat fixing plate.
An installation structure for an expansion / contraction protection device, characterized in that a slat guide member that guides both sides of the slat fixing plate when the expansion / contraction protection device moves in accordance with the movement of the machine movable portion is disposed in the gap. .